### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, December 5, 2018 at 9:46:08 PM UTC, Bruce wrote: > > On Wed, Dec 5, 2018 at 11:01 PM > wrote: > >> On Wednesday, December 5, 2018 at 5:39:43 AM UTC, Bruce wrote: >>> >>> On Wed, Dec 5, 2018 at 3:53 PM Philip Thrift wrote: >>> On Tuesday, December 4, 2018 at 10:28:39 PM UTC-6,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wed, Dec 5, 2018 at 11:01 PM wrote: > On Wednesday, December 5, 2018 at 5:39:43 AM UTC, Bruce wrote: >> >> On Wed, Dec 5, 2018 at 3:53 PM Philip Thrift wrote: >> >>> On Tuesday, December 4, 2018 at 10:28:39 PM UTC-6, Philip Thrift wrote: On Tuesday, December 4, 2018 at 3:45:32 PM

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, December 5, 2018 at 5:39:43 AM UTC, Bruce wrote: > > On Wed, Dec 5, 2018 at 3:53 PM Philip Thrift > wrote: > >> On Tuesday, December 4, 2018 at 10:28:39 PM UTC-6, Philip Thrift wrote: >>> >>> On Tuesday, December 4, 2018 at 3:45:32 PM UTC-6, Bruce wrote: On Wed, Dec 5,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, December 5, 2018 at 1:55:22 AM UTC-6, Bruce wrote: > > On Wed, Dec 5, 2018 at 6:08 PM Philip Thrift > wrote: > >> >>> As has been pointed out, path integrals are a calculational tool, not an >>> interpretation. >>> >> >> >> Oh,* that* again. It's like Groundhog Day (the movie).

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wed, Dec 5, 2018 at 6:08 PM Philip Thrift wrote: > On Wednesday, December 5, 2018 at 12:53:45 AM UTC-6, Bruce wrote: >> >> On Wed, Dec 5, 2018 at 5:43 PM Philip Thrift wrote: >> >>> On Wednesday, December 5, 2018 at 12:28:19 AM UTC-6, Bruce wrote: On Wed, Dec 5, 2018 at 5:19 PM

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, December 5, 2018 at 12:53:45 AM UTC-6, Bruce wrote: > > On Wed, Dec 5, 2018 at 5:43 PM Philip Thrift > wrote: > >> On Wednesday, December 5, 2018 at 12:28:19 AM UTC-6, Bruce wrote: >>> >>> On Wed, Dec 5, 2018 at 5:19 PM Philip Thrift wrote: >>> On Wednesday, December 5, 2018

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wed, Dec 5, 2018 at 5:43 PM Philip Thrift wrote: > On Wednesday, December 5, 2018 at 12:28:19 AM UTC-6, Bruce wrote: >> >> On Wed, Dec 5, 2018 at 5:19 PM Philip Thrift wrote: >> >>> On Wednesday, December 5, 2018 at 12:00:18 AM UTC-6, Bruce wrote: On Wed, Dec 5, 2018 at 4:51 PM

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, December 5, 2018 at 12:28:19 AM UTC-6, Bruce wrote: > > On Wed, Dec 5, 2018 at 5:19 PM Philip Thrift > wrote: > >> On Wednesday, December 5, 2018 at 12:00:18 AM UTC-6, Bruce wrote: >>> >>> On Wed, Dec 5, 2018 at 4:51 PM Philip Thrift wrote: >>> On Tuesday, December 4, 2018

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wed, Dec 5, 2018 at 5:19 PM Philip Thrift wrote: > On Wednesday, December 5, 2018 at 12:00:18 AM UTC-6, Bruce wrote: >> >> On Wed, Dec 5, 2018 at 4:51 PM Philip Thrift wrote: >> >>> On Tuesday, December 4, 2018 at 11:39:43 PM UTC-6, Bruce wrote: On Wed, Dec 5, 2018 at 3:53 PM

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, December 5, 2018 at 12:00:18 AM UTC-6, Bruce wrote: > > On Wed, Dec 5, 2018 at 4:51 PM Philip Thrift > wrote: > >> On Tuesday, December 4, 2018 at 11:39:43 PM UTC-6, Bruce wrote: >>> >>> On Wed, Dec 5, 2018 at 3:53 PM Philip Thrift wrote: >>> On Tuesday, December 4, 2018 at

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wed, Dec 5, 2018 at 4:51 PM Philip Thrift wrote: > On Tuesday, December 4, 2018 at 11:39:43 PM UTC-6, Bruce wrote: >> >> On Wed, Dec 5, 2018 at 3:53 PM Philip Thrift wrote: >> >>> On Tuesday, December 4, 2018 at 10:28:39 PM UTC-6, Philip Thrift wrote: On Tuesday, December 4, 2018

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, December 4, 2018 at 11:39:43 PM UTC-6, Bruce wrote: > > On Wed, Dec 5, 2018 at 3:53 PM Philip Thrift > wrote: > >> On Tuesday, December 4, 2018 at 10:28:39 PM UTC-6, Philip Thrift wrote: >>> >>> On Tuesday, December 4, 2018 at 3:45:32 PM UTC-6, Bruce wrote: On Wed, Dec 5,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wed, Dec 5, 2018 at 3:53 PM Philip Thrift wrote: > On Tuesday, December 4, 2018 at 10:28:39 PM UTC-6, Philip Thrift wrote: >> >> On Tuesday, December 4, 2018 at 3:45:32 PM UTC-6, Bruce wrote: >>> >>> On Wed, Dec 5, 2018 at 6:58 AM Philip Thrift wrote: >>> On Tuesday, December 4,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, December 4, 2018 at 10:28:39 PM UTC-6, Philip Thrift wrote: > > > > On Tuesday, December 4, 2018 at 3:45:32 PM UTC-6, Bruce wrote: >> >> On Wed, Dec 5, 2018 at 6:58 AM Philip Thrift wrote: >> >>> >>> On Tuesday, December 4, 2018 at 1:53:15 PM UTC-6, Brent wrote: On

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, December 4, 2018 at 3:45:32 PM UTC-6, Bruce wrote: > > On Wed, Dec 5, 2018 at 6:58 AM Philip Thrift > wrote: > >> >> On Tuesday, December 4, 2018 at 1:53:15 PM UTC-6, Brent wrote: >>> >>> >>> On 12/4/2018 12:25 AM, Philip Thrift wrote: >>> >>> >>> 1. Histories originate at an

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wed, Dec 5, 2018 at 6:58 AM Philip Thrift wrote: > > On Tuesday, December 4, 2018 at 1:53:15 PM UTC-6, Brent wrote: >> >> >> On 12/4/2018 12:25 AM, Philip Thrift wrote: >> >> >> 1. Histories originate at an emitter e and end at screen locations s on a >> screen S. >> 2. At each s there is a

### Re: Measuring a system in a superposition of states vs in a mixed state

On 12/4/2018 3:05 AM, Bruno Marchal wrote: … where Omnès added “time to be irrational” ... 1. Histories originate at an emitter e and end at screen locations s on a screen S. 2. At each s there is a history bundle histories(s). A weight w(s) is computed from the bundle by summing the

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, December 4, 2018 at 1:53:15 PM UTC-6, Brent wrote: > > > > On 12/4/2018 12:25 AM, Philip Thrift wrote: > > > > On Monday, December 3, 2018 at 9:00:26 PM UTC-6, Brent wrote: >> >> >> >> On 12/3/2018 8:50 AM, Bruno Marchal wrote: >> >> >> On 3 Dec 2018, at 10:35, Philip Thrift wrote:

### Re: Measuring a system in a superposition of states vs in a mixed state

On 12/4/2018 12:25 AM, Philip Thrift wrote: On Monday, December 3, 2018 at 9:00:26 PM UTC-6, Brent wrote: On 12/3/2018 8:50 AM, Bruno Marchal wrote: On 3 Dec 2018, at 10:35, Philip Thrift > wrote: On Sunday, December 2, 2018 at 8:17:54 PM UTC-6, Brent wrote:

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 4 Dec 2018, at 09:25, Philip Thrift wrote: > > > > On Monday, December 3, 2018 at 9:00:26 PM UTC-6, Brent wrote: > > > On 12/3/2018 8:50 AM, Bruno Marchal wrote: >> >>> On 3 Dec 2018, at 10:35, Philip Thrift > >>> wrote: >>> >>> >>> >>> On Sunday, December 2, 2018 at 8:17:54 PM

### Re: Measuring a system in a superposition of states vs in a mixed state

On Monday, December 3, 2018 at 9:00:26 PM UTC-6, Brent wrote: > > > > On 12/3/2018 8:50 AM, Bruno Marchal wrote: > > > On 3 Dec 2018, at 10:35, Philip Thrift > > wrote: > > > > On Sunday, December 2, 2018 at 8:17:54 PM UTC-6, Brent wrote: >> >> >> >> On 12/2/2018 5:14 PM, Philip Thrift wrote:

### Re: Measuring a system in a superposition of states vs in a mixed state

On 12/3/2018 8:50 AM, Bruno Marchal wrote: On 3 Dec 2018, at 10:35, Philip Thrift > wrote: On Sunday, December 2, 2018 at 8:17:54 PM UTC-6, Brent wrote: On 12/2/2018 5:14 PM, Philip Thrift wrote: On Sunday, December 2, 2018 at 4:25:04 PM UTC-6,

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 3 Dec 2018, at 10:35, Philip Thrift wrote: > > > > On Sunday, December 2, 2018 at 8:17:54 PM UTC-6, Brent wrote: > > > On 12/2/2018 5:14 PM, Philip Thrift wrote: >> >> >> On Sunday, December 2, 2018 at 4:25:04 PM UTC-6, Brent wrote: >> >> >> On 12/2/2018 11:42 AM, Philip Thrift

### Re: Measuring a system in a superposition of states vs in a mixed state

On Sunday, December 2, 2018 at 8:17:54 PM UTC-6, Brent wrote: > > > > On 12/2/2018 5:14 PM, Philip Thrift wrote: > > > > On Sunday, December 2, 2018 at 4:25:04 PM UTC-6, Brent wrote: >> >> >> >> On 12/2/2018 11:42 AM, Philip Thrift wrote: >> >> >> >> On Sunday, December 2, 2018 at 8:13:48 AM

### Re: Measuring a system in a superposition of states vs in a mixed state

On 12/2/2018 5:14 PM, Philip Thrift wrote: On Sunday, December 2, 2018 at 4:25:04 PM UTC-6, Brent wrote: On 12/2/2018 11:42 AM, Philip Thrift wrote: On Sunday, December 2, 2018 at 8:13:48 AM UTC-6, agrays...@gmail.com wrote: * * *Obviously, from a

### Re: Measuring a system in a superposition of states vs in a mixed state

On Sunday, December 2, 2018 at 4:25:04 PM UTC-6, Brent wrote: > > > > On 12/2/2018 11:42 AM, Philip Thrift wrote: > > > > On Sunday, December 2, 2018 at 8:13:48 AM UTC-6, agrays...@gmail.com > wrote: >> >> >> *Obviously, from a one-world perspective, only one history survives for a >> single

### Re: Measuring a system in a superposition of states vs in a mixed state

On 12/2/2018 11:42 AM, Philip Thrift wrote: On Sunday, December 2, 2018 at 8:13:48 AM UTC-6, agrays...@gmail.com wrote: * * *Obviously, from a one-world perspective, only one history survives for a single trial. But to even grossly approach anything describable as

### Re: Measuring a system in a superposition of states vs in a mixed state

On Sunday, December 2, 2018 at 8:13:48 AM UTC-6, agrays...@gmail.com wrote: > > > *Obviously, from a one-world perspective, only one history survives for a > single trial. But to even grossly approach anything describable as > "Darwinian", you have to identify characteristics of histories

### Re: Measuring a system in a superposition of states vs in a mixed state

On Sunday, December 2, 2018 at 1:27:05 PM UTC, Bruno Marchal wrote: > > > On 1 Dec 2018, at 17:12, agrays...@gmail.com wrote: > > > > On Friday, November 30, 2018 at 8:53:43 AM UTC, Bruno Marchal wrote: >> >> >> On 27 Nov 2018, at 22:55, agrays...@gmail.com wrote: >> >> >> >> On Tuesday,

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 1 Dec 2018, at 17:12, agrayson2...@gmail.com wrote: > > > > On Friday, November 30, 2018 at 8:53:43 AM UTC, Bruno Marchal wrote: > >> On 27 Nov 2018, at 22:55, agrays...@gmail.com wrote: >> >> >> >> On Tuesday, November 27, 2018 at 8:43:55 PM UTC, Philip Thrift wrote: >> >> >> On

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 30 Nov 2018, at 12:29, agrayson2...@gmail.com wrote: > > > > On Friday, November 30, 2018 at 9:03:51 AM UTC, Bruno Marchal wrote: > >> On 28 Nov 2018, at 15:02, agrays...@gmail.com wrote: >> >> >> >> On Wednesday, November 28, 2018 at 1:41:03 PM UTC, Bruno Marchal wrote: >> >>> On

### Re: Measuring a system in a superposition of states vs in a mixed state

On Saturday, December 1, 2018 at 10:12:53 AM UTC-6, agrays...@gmail.com wrote: > > > > On Friday, November 30, 2018 at 8:53:43 AM UTC, Bruno Marchal wrote: >> >> >> >> I think that the comparison with Darwin makes sense, and in both case, >> there are many “fittest” entities. >> > > > *IMO,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Friday, November 30, 2018 at 8:53:43 AM UTC, Bruno Marchal wrote: > > > On 27 Nov 2018, at 22:55, agrays...@gmail.com wrote: > > > > On Tuesday, November 27, 2018 at 8:43:55 PM UTC, Philip Thrift wrote: >> >> >> >> On Tuesday, November 27, 2018 at 2:05:04 PM UTC-6, agrays...@gmail.com >>

### Re: Measuring a system in a superposition of states vs in a mixed state

On Friday, November 30, 2018 at 9:03:51 AM UTC, Bruno Marchal wrote: > > > On 28 Nov 2018, at 15:02, agrays...@gmail.com wrote: > > > > On Wednesday, November 28, 2018 at 1:41:03 PM UTC, Bruno Marchal wrote: >> >> >> On 26 Nov 2018, at 22:43, agrays...@gmail.com wrote: >> >> >> >> On Monday,

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 28 Nov 2018, at 16:37, agrayson2...@gmail.com wrote: > > > > On Wednesday, November 28, 2018 at 1:46:28 PM UTC, Bruno Marchal wrote: > >> On 26 Nov 2018, at 22:49, agrays...@gmail.com wrote: >> >> >> >> On Monday, November 26, 2018 at 9:43:14 PM UTC, agrays...@gmail.com >>

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 28 Nov 2018, at 15:02, agrayson2...@gmail.com wrote: > > > > On Wednesday, November 28, 2018 at 1:41:03 PM UTC, Bruno Marchal wrote: > >> On 26 Nov 2018, at 22:43, agrays...@gmail.com wrote: >> >> >> >> On Monday, November 26, 2018 at 4:41:42 PM UTC, agrays...@gmail.com >>

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 27 Nov 2018, at 22:55, agrayson2...@gmail.com wrote: > > > > On Tuesday, November 27, 2018 at 8:43:55 PM UTC, Philip Thrift wrote: > > > On Tuesday, November 27, 2018 at 2:05:04 PM UTC-6, agrays...@gmail.com <> > wrote: > > > On Tuesday, November 27, 2018 at 6:49:51 PM UTC, Philip

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, November 28, 2018 at 7:41:03 AM UTC-6, Bruno Marchal wrote: > > > You can derive Schroedinger's equation (even Dirac’s equation) from > Feynman’s formulation. This should be intuitively obvious if you read > Feynman popular book on the Nature of Light. The waves are there. But

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 27 Nov 2018, at 10:27, Philip Thrift wrote: > > > > On Monday, November 26, 2018 at 3:43:14 PM UTC-6, agrays...@gmail.com wrote: > > I checked the postulates in Feynman's Sums Over Histories (in link provided > by Phil) and I see nothing related to waves, as expected, and thus nothing

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, November 28, 2018 at 1:46:28 PM UTC, Bruno Marchal wrote: > > > On 26 Nov 2018, at 22:49, agrays...@gmail.com wrote: > > > > On Monday, November 26, 2018 at 9:43:14 PM UTC, agrays...@gmail.com wrote: >> >> >> >> On Monday, November 26, 2018 at 4:41:42 PM UTC, agrays...@gmail.com

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, November 28, 2018 at 1:41:03 PM UTC, Bruno Marchal wrote: > > > On 26 Nov 2018, at 22:43, agrays...@gmail.com wrote: > > > > On Monday, November 26, 2018 at 4:41:42 PM UTC, agrays...@gmail.com wrote: >> >> >> >> On Monday, November 26, 2018 at 12:01:05 PM UTC, Bruno Marchal wrote:

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 26 Nov 2018, at 22:49, agrayson2...@gmail.com wrote: > > > > On Monday, November 26, 2018 at 9:43:14 PM UTC, agrays...@gmail.com wrote: > > > On Monday, November 26, 2018 at 4:41:42 PM UTC, agrays...@gmail.com <> wrote: > > > On Monday, November 26, 2018 at 12:01:05 PM UTC, Bruno

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 26 Nov 2018, at 22:43, agrayson2...@gmail.com wrote: > > > > On Monday, November 26, 2018 at 4:41:42 PM UTC, agrays...@gmail.com wrote: > > > On Monday, November 26, 2018 at 12:01:05 PM UTC, Bruno Marchal wrote: > >> On 23 Nov 2018, at 13:30, agrays...@gmail.com <> wrote: >> >> >>

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, November 28, 2018 at 8:13:21 AM UTC, Philip Thrift wrote: > > > > On Tuesday, November 27, 2018 at 6:07:41 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Tuesday, November 27, 2018 at 10:47:08 PM UTC, Philip Thrift wrote: >>> >>> >>> >>> On Tuesday, November 27, 2018 at

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 6:07:41 PM UTC-6, agrays...@gmail.com wrote: > > > > On Tuesday, November 27, 2018 at 10:47:08 PM UTC, Philip Thrift wrote: >> >> >> >> On Tuesday, November 27, 2018 at 3:55:16 PM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> >>> On Tuesday, November 27,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 10:47:08 PM UTC, Philip Thrift wrote: > > > > On Tuesday, November 27, 2018 at 3:55:16 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Tuesday, November 27, 2018 at 8:43:55 PM UTC, Philip Thrift wrote: >>> >>> >>> >>> On Tuesday, November 27, 2018 at

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 3:55:16 PM UTC-6, agrays...@gmail.com wrote: > > > > On Tuesday, November 27, 2018 at 8:43:55 PM UTC, Philip Thrift wrote: >> >> >> >> On Tuesday, November 27, 2018 at 2:05:04 PM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> >>> On Tuesday, November 27, 2018

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 2:56:36 PM UTC-6, Brent wrote: > > > > On 11/27/2018 12:43 PM, Philip Thrift wrote: > > > > On Tuesday, November 27, 2018 at 2:05:04 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Tuesday, November 27, 2018 at 6:49:51 PM UTC, Philip Thrift wrote: >>>

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 8:43:55 PM UTC, Philip Thrift wrote: > > > > On Tuesday, November 27, 2018 at 2:05:04 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Tuesday, November 27, 2018 at 6:49:51 PM UTC, Philip Thrift wrote: >>> >>> >>> >>> On Tuesday, November 27, 2018 at

### Re: Measuring a system in a superposition of states vs in a mixed state

On 11/27/2018 12:43 PM, Philip Thrift wrote: On Tuesday, November 27, 2018 at 2:05:04 PM UTC-6, agrays...@gmail.com wrote: On Tuesday, November 27, 2018 at 6:49:51 PM UTC, Philip Thrift wrote: On Tuesday, November 27, 2018 at 12:17:08 PM UTC-6, agrays...@gmail.com

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 2:05:04 PM UTC-6, agrays...@gmail.com wrote: > > > > On Tuesday, November 27, 2018 at 6:49:51 PM UTC, Philip Thrift wrote: >> >> >> >> On Tuesday, November 27, 2018 at 12:17:08 PM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> >>> On Tuesday, November 27,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 6:49:51 PM UTC, Philip Thrift wrote: > > > > On Tuesday, November 27, 2018 at 12:17:08 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Tuesday, November 27, 2018 at 6:00:50 PM UTC, Philip Thrift wrote: >>> >>> >>> >>> On Tuesday, November 27, 2018 at

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 12:17:08 PM UTC-6, agrays...@gmail.com wrote: > > > > On Tuesday, November 27, 2018 at 6:00:50 PM UTC, Philip Thrift wrote: >> >> >> >> On Tuesday, November 27, 2018 at 8:43:35 AM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> >>> On Tuesday, November 27,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 6:00:50 PM UTC, Philip Thrift wrote: > > > > On Tuesday, November 27, 2018 at 8:43:35 AM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Tuesday, November 27, 2018 at 9:27:46 AM UTC, Philip Thrift wrote: >>> >>> >>> >>> On Monday, November 26, 2018 at 3:43:14

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 8:43:35 AM UTC-6, agrays...@gmail.com wrote: > > > > On Tuesday, November 27, 2018 at 9:27:46 AM UTC, Philip Thrift wrote: >> >> >> >> On Monday, November 26, 2018 at 3:43:14 PM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> *I checked the postulates in

### Re: Measuring a system in a superposition of states vs in a mixed state

On Tuesday, November 27, 2018 at 9:27:46 AM UTC, Philip Thrift wrote: > > > > On Monday, November 26, 2018 at 3:43:14 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> *I checked the postulates in Feynman's Sums Over Histories (in link >> provided by Phil) and I see nothing related to waves, as

### Re: Measuring a system in a superposition of states vs in a mixed state

On Monday, November 26, 2018 at 3:43:14 PM UTC-6, agrays...@gmail.com wrote: > > > *I checked the postulates in Feynman's Sums Over Histories (in link > provided by Phil) and I see nothing related to waves, as expected, and thus > nothing about collapse of anything. I would suppose the same

### Re: Measuring a system in a superposition of states vs in a mixed state

On Monday, November 26, 2018 at 9:43:14 PM UTC, agrays...@gmail.com wrote: > > > > On Monday, November 26, 2018 at 4:41:42 PM UTC, agrays...@gmail.com wrote: >> >> >> >> On Monday, November 26, 2018 at 12:01:05 PM UTC, Bruno Marchal wrote: >>> >>> >>> On 23 Nov 2018, at 13:30,

### Re: Measuring a system in a superposition of states vs in a mixed state

On Monday, November 26, 2018 at 4:41:42 PM UTC, agrays...@gmail.com wrote: > > > > On Monday, November 26, 2018 at 12:01:05 PM UTC, Bruno Marchal wrote: >> >> >> On 23 Nov 2018, at 13:30, agrays...@gmail.com wrote: >> >> >> >> On Friday, November 23, 2018 at 11:29:14 AM UTC, Bruno Marchal wrote:

### Re: Measuring a system in a superposition of states vs in a mixed state

On Monday, November 26, 2018 at 12:01:05 PM UTC, Bruno Marchal wrote: > > > On 23 Nov 2018, at 13:30, agrays...@gmail.com wrote: > > > > On Friday, November 23, 2018 at 11:29:14 AM UTC, Bruno Marchal wrote: >> >> >> On 21 Nov 2018, at 18:03, agrays...@gmail.com wrote: >> >> >> >> On Monday,

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 23 Nov 2018, at 13:30, agrayson2...@gmail.com wrote: > > > > On Friday, November 23, 2018 at 11:29:14 AM UTC, Bruno Marchal wrote: > >> On 21 Nov 2018, at 18:03, agrays...@gmail.com wrote: >> >> >> >> On Monday, November 19, 2018 at 3:52:37 PM UTC, Bruno Marchal wrote: >> >>> On 18

### Re: Measuring a system in a superposition of states vs in a mixed state.

On Sat, Nov 24, 2018 at 8:08 AM wrote: *> Why do you make this gratuitous point. and on a regular basis, when you > habitually indicate which theories you like or don't like?* As I've said before I have no loyalty, if I find a idea doesn't fit the facts then regardless of my previous

### Re: Measuring a system in a superposition of states vs in a mixed state.

On Friday, November 23, 2018 at 5:29:05 PM UTC, John Clark wrote: > > > agrays...@gmail.com > > *>** So Feynman adds this additional hypothesis to QM. Is this kosher?* > > > It had better be kosher because it works! > > *> ** introducing an infinity of universes seems extraneous and confusing

### Re: Measuring a system in a superposition of states vs in a mixed state.

On Friday, November 23, 2018 at 5:29:05 PM UTC, John Clark wrote: > > > agrays...@gmail.com > > *>** So Feynman adds this additional hypothesis to QM. Is this kosher?* > > > It had better be kosher because it works! > > *> ** introducing an infinity of universes seems extraneous and confusing

### Re: Measuring a system in a superposition of states vs in a mixed state

On Friday, November 23, 2018 at 11:29:14 AM UTC, Bruno Marchal wrote: > > > On 21 Nov 2018, at 18:03, agrays...@gmail.com wrote: > > > > On Monday, November 19, 2018 at 3:52:37 PM UTC, Bruno Marchal wrote: >> >> >> On 18 Nov 2018, at 14:00, agrays...@gmail.com wrote: >> >> >> >> On Sunday,

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 21 Nov 2018, at 18:03, agrayson2...@gmail.com wrote: > > > > On Monday, November 19, 2018 at 3:52:37 PM UTC, Bruno Marchal wrote: > >> On 18 Nov 2018, at 14:00, agrays...@gmail.com wrote: >> >> >> >> On Sunday, November 18, 2018 at 12:19:20 PM UTC, Bruno Marchal wrote: >> >>> On 16

### Re: Measuring a system in a superposition of states vs in a mixed state

On Monday, November 19, 2018 at 3:52:37 PM UTC, Bruno Marchal wrote: > > > On 18 Nov 2018, at 14:00, agrays...@gmail.com wrote: > > > > On Sunday, November 18, 2018 at 12:19:20 PM UTC, Bruno Marchal wrote: >> >> >> On 16 Nov 2018, at 15:38, agrays...@gmail.com wrote: >> >> >> >> On Friday,

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 18 Nov 2018, at 14:00, agrayson2...@gmail.com wrote: > > > > On Sunday, November 18, 2018 at 12:19:20 PM UTC, Bruno Marchal wrote: > >> On 16 Nov 2018, at 15:38, agrays...@gmail.com wrote: >> >> >> >> On Friday, November 16, 2018 at 10:14:32 AM UTC, scerir wrote: >> >> >>> Il 16

### Re: Measuring a system in a superposition of states vs in a mixed state

On Sunday, November 18, 2018 at 3:20:47 PM UTC-6, agrays...@gmail.com wrote: > > > > On Sunday, November 18, 2018 at 9:14:25 PM UTC, Philip Thrift wrote: >> >> >> >> On Sunday, November 18, 2018 at 11:49:57 AM UTC-6, agrays...@gmail.com >> wrote: >>> >>> >>> *For the simple case of two

### Re: Measuring a system in a superposition of states vs in a mixed state

On Sunday, November 18, 2018 at 9:14:25 PM UTC, Philip Thrift wrote: > > > > On Sunday, November 18, 2018 at 11:49:57 AM UTC-6, agrays...@gmail.com > wrote: >> >> >> *For the simple case of two histories, presumably of particles, how does >> Feynman introduce interference? What's the

### Re: Measuring a system in a superposition of states vs in a mixed state

On Sunday, November 18, 2018 at 11:49:57 AM UTC-6, agrays...@gmail.com wrote: > > > *For the simple case of two histories, presumably of particles, how does > Feynman introduce interference? What's the conceptual framework for > interference among or between histories? TIA, AG * > >> >>

### Re: Measuring a system in a superposition of states vs in a mixed state

On Thursday, November 15, 2018 at 7:37:58 PM UTC, Brent wrote: > > > > On 11/14/2018 11:23 PM, Philip Thrift wrote: > > > > On Wednesday, November 14, 2018 at 6:55:36 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Wednesday, November 14, 2018 at 10:20:09 PM UTC, Pierz wrote: >>> >>>

### Re: Measuring a system in a superposition of states vs in a mixed state

On Sunday, November 18, 2018 at 12:19:20 PM UTC, Bruno Marchal wrote: > > > On 16 Nov 2018, at 15:38, agrays...@gmail.com wrote: > > > > On Friday, November 16, 2018 at 10:14:32 AM UTC, scerir wrote: >> >> >> Il 16 novembre 2018 alle 10.19 agrays...@gmail.com ha scritto: >> >> >> >> On

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 16 Nov 2018, at 15:38, agrayson2...@gmail.com wrote: > > > > On Friday, November 16, 2018 at 10:14:32 AM UTC, scerir wrote: > > >> Il 16 novembre 2018 alle 10.19 agrays...@gmail.com ha scritto: >> >> >> >> On Thursday, November 15, 2018 at 2:14:48 PM UTC, scerir wrote: >> >> >>>

### Re: Measuring a system in a superposition of states vs in a mixed state

On Saturday, November 17, 2018 at 4:39:08 PM UTC, agrays...@gmail.com wrote: > > > > On Saturday, November 17, 2018 at 4:22:35 PM UTC, agrays...@gmail.com > wrote: >> >> >> >> On Friday, November 16, 2018 at 4:39:42 PM UTC, scerir wrote: >>> >>> >>> Il 16 novembre 2018 alle 15.38

### Re: Measuring a system in a superposition of states vs in a mixed state

On Saturday, November 17, 2018 at 4:22:35 PM UTC, agrays...@gmail.com wrote: > > > > On Friday, November 16, 2018 at 4:39:42 PM UTC, scerir wrote: >> >> >> Il 16 novembre 2018 alle 15.38 agrays...@gmail.com ha scritto: >> >> >> >> On Friday, November 16, 2018 at 10:14:32 AM UTC, scerir wrote:

### Re: Measuring a system in a superposition of states vs in a mixed state

On Friday, November 16, 2018 at 4:39:42 PM UTC, scerir wrote: > > > Il 16 novembre 2018 alle 15.38 agrays...@gmail.com ha > scritto: > > > > On Friday, November 16, 2018 at 10:14:32 AM UTC, scerir wrote: > > > Il 16 novembre 2018 alle 10.19 agrays...@gmail.com ha scritto: > > > > On

### Re: Measuring a system in a superposition of states vs in a mixed state

> Il 16 novembre 2018 alle 18.20 agrayson2...@gmail.com ha scritto: > > > > On Friday, November 16, 2018 at 4:39:42 PM UTC, scerir wrote: > > > > > > > > > > > Il 16 novembre 2018 alle 15.38 agrays...@gmail.com ha > > scritto: > > > > > > > > > > > >

### Re: Measuring a system in a superposition of states vs in a mixed state

On Friday, November 16, 2018 at 4:39:42 PM UTC, scerir wrote: > > > Il 16 novembre 2018 alle 15.38 agrays...@gmail.com ha > scritto: > > > > On Friday, November 16, 2018 at 10:14:32 AM UTC, scerir wrote: > > > Il 16 novembre 2018 alle 10.19 agrays...@gmail.com ha scritto: > > > > On

### Re: Measuring a system in a superposition of states vs in a mixed state

> Il 16 novembre 2018 alle 15.38 agrayson2...@gmail.com ha scritto: > > > > On Friday, November 16, 2018 at 10:14:32 AM UTC, scerir wrote: > > > > > > > > > > > Il 16 novembre 2018 alle 10.19 agrays...@gmail.com ha > > scritto: > > > > > > > > > > > >

### Re: Measuring a system in a superposition of states vs in a mixed state

On Friday, November 16, 2018 at 10:14:32 AM UTC, scerir wrote: > > > Il 16 novembre 2018 alle 10.19 agrays...@gmail.com ha > scritto: > > > > On Thursday, November 15, 2018 at 2:14:48 PM UTC, scerir wrote: > > > Il 15 novembre 2018 alle 14.29 agrays...@gmail.com ha scritto: > > > > On

### Re: Measuring a system in a superposition of states vs in a mixed state

https://www.st-andrews.ac.uk/~www_pa/quvis/simulations_html5/sims/superposition/superposition-mixed-states.html -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email

### Re: Measuring a system in a superposition of states vs in a mixed state

> Il 16 novembre 2018 alle 10.19 agrayson2...@gmail.com ha scritto: > > > > On Thursday, November 15, 2018 at 2:14:48 PM UTC, scerir wrote: > > > > > > > > > > > Il 15 novembre 2018 alle 14.29 agrays...@gmail.com ha > > scritto: > > > > > > > > > > > >

### Re: Measuring a system in a superposition of states vs in a mixed state

On Thursday, November 15, 2018 at 2:14:48 PM UTC, scerir wrote: > > > Il 15 novembre 2018 alle 14.29 agrays...@gmail.com ha > scritto: > > > > On Thursday, November 15, 2018 at 8:04:53 AM UTC, scerir wrote: > > Imagine a spin-1/2 particle described by the state psi = sqrt(1/2) [(s+)_z > +

### Re: Measuring a system in a superposition of states vs in a mixed state

On Thursday, November 15, 2018 at 1:37:58 PM UTC-6, Brent wrote: > > > > On 11/14/2018 11:23 PM, Philip Thrift wrote: > > > > On Wednesday, November 14, 2018 at 6:55:36 PM UTC-6, agrays...@gmail.com > wrote: >> >> >> >> On Wednesday, November 14, 2018 at 10:20:09 PM UTC, Pierz wrote: >>> >>>

### Re: Measuring a system in a superposition of states vs in a mixed state

On 11/14/2018 11:23 PM, Philip Thrift wrote: On Wednesday, November 14, 2018 at 6:55:36 PM UTC-6, agrays...@gmail.com wrote: On Wednesday, November 14, 2018 at 10:20:09 PM UTC, Pierz wrote: Obviously you can't measure the particle simultaneously in the up and down

### Re: Measuring a system in a superposition of states vs in a mixed state

On Thursday, November 15, 2018 at 3:03:09 PM UTC, Bruno Marchal wrote: > > > On 15 Nov 2018, at 09:04, 'scerir' via Everything List < > everyth...@googlegroups.com > wrote: > > Imagine a spin-1/2 particle described by the state psi = sqrt(1/2) [(s+)_z > + (s-)_z] . > > If the x-component of

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 15 Nov 2018, at 09:04, 'scerir' via Everything List > wrote: > > Imagine a spin-1/2 particle described by the state psi = sqrt(1/2) [(s+)_z + > (s-)_z] . > > If the x-component of spin is measured by passing the spin-1/2 particle > through a Stern-Gerlach with its field oriented along

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 13 Nov 2018, at 19:38, agrayson2...@gmail.com wrote: > > > > On Monday, November 12, 2018 at 2:32:53 AM UTC, agrays...@gmail.com wrote: > > > On Sunday, November 11, 2018 at 5:43:00 PM UTC, agrays...@gmail.com <> wrote: > > > On Sunday, November 11, 2018 at 7:52:00 AM UTC, Bruno

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 12 Nov 2018, at 03:32, agrayson2...@gmail.com wrote: > > > > On Sunday, November 11, 2018 at 5:43:00 PM UTC, agrays...@gmail.com wrote: > > > On Sunday, November 11, 2018 at 7:52:00 AM UTC, Bruno Marchal wrote: > >> On 10 Nov 2018, at 01:27, agrays...@gmail.com <> wrote: >> >> >> >>

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 11 Nov 2018, at 18:43, agrayson2...@gmail.com wrote: > > > > On Sunday, November 11, 2018 at 7:52:00 AM UTC, Bruno Marchal wrote: > >> On 10 Nov 2018, at 01:27, agrays...@gmail.com wrote: >> >> >> >> On Friday, November 9, 2018 at 12:26:52 PM UTC, Bruno Marchal wrote: >> >>> On 8

### Re: Measuring a system in a superposition of states vs in a mixed state

> On 11 Nov 2018, at 10:56, agrayson2...@gmail.com wrote: > > > > On Sunday, November 11, 2018 at 7:52:00 AM UTC, Bruno Marchal wrote: > >> On 10 Nov 2018, at 01:27, agrays...@gmail.com wrote: >> >> >> >> On Friday, November 9, 2018 at 12:26:52 PM UTC, Bruno Marchal wrote: >> >>> On 8

### Re: Measuring a system in a superposition of states vs in a mixed state

> Il 15 novembre 2018 alle 14.29 agrayson2...@gmail.com ha scritto: > > > > On Thursday, November 15, 2018 at 8:04:53 AM UTC, scerir wrote: > > > > > > Imagine a spin-1/2 particle described by the state psi = sqrt(1/2) > > [(s+)_z + (s-)_z] . > > > > If the

### Re: Measuring a system in a superposition of states vs in a mixed state

On Thursday, November 15, 2018 at 8:04:53 AM UTC, scerir wrote: > > Imagine a spin-1/2 particle described by the state psi = sqrt(1/2) [(s+)_z > + (s-)_z] . > > If the x-component of spin is measured by passing the spin-1/2 particle > through a Stern-Gerlach with its field oriented along the

### Re: Measuring a system in a superposition of states vs in a mixed state

On Monday, October 29, 2018 at 10:22:02 AM UTC, Bruno Marchal wrote: > > > On 28 Oct 2018, at 13:21, agrays...@gmail.com wrote: > > > > On Sunday, October 28, 2018 at 9:27:56 AM UTC, Bruno Marchal wrote: >> >> >> On 25 Oct 2018, at 17:12, agrays...@gmail.com wrote: >> >> >> >> On Tuesday,

### Re: Measuring a system in a superposition of states vs in a mixed state

Imagine a spin-1/2 particle described by the state psi = sqrt(1/2) [(s+)_z + (s-)_z] . If the x-component of spin is measured by passing the spin-1/2 particle through a Stern-Gerlach with its field oriented along the x-axis, the particle will ALWAYS emerge 'up'.. In fact (s+)_z = sqrt(1/2)

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, November 14, 2018 at 6:55:36 PM UTC-6, agrays...@gmail.com wrote: > > > > On Wednesday, November 14, 2018 at 10:20:09 PM UTC, Pierz wrote: >> >> Obviously you can't measure the particle simultaneously in the up and >> down state. Nobody believes that. Nobody is arguing it. > > >

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, November 14, 2018 at 10:20:09 PM UTC, Pierz wrote: > > Obviously you can't measure the particle simultaneously in the up and down > state. Nobody believes that. Nobody is arguing it. *Haven't you ever heard of physicists, some prominent who write books about QM for the lay

### Re: Measuring a system in a superposition of states vs in a mixed state

On Wednesday, November 14, 2018 at 10:20:09 PM UTC, Pierz wrote: > > Obviously you can't measure the particle simultaneously in the up and down > state. Nobody believes that. Bruno does. Nobody is arguing it. Bruno argues it. Honestly it's hard to understand why you have such an agitated

### Re: Measuring a system in a superposition of states vs in a mixed state

Obviously you can't measure the particle simultaneously in the up and down state. Nobody believes that. Nobody is arguing it. Honestly it's hard to understand why you have such an agitated bee in your bonnet about superpositions. The mathematical expression of the photon polarised at 45