On Tue, Jul 6, 2021, 10:15 PM Bruce Kellett <[email protected]> wrote:
> On Wed, Jul 7, 2021 at 11:50 AM Jason Resch <[email protected]> wrote: > >> On Tue, Jul 6, 2021, 9:39 PM Bruce Kellett <[email protected]> wrote: >> >>> On Wed, Jul 7, 2021 at 11:29 AM Jason Resch <[email protected]> >>> wrote: >>> >>>> On Tue, Jul 6, 2021, 4:07 PM 'Brent Meeker' via Everything List < >>>> [email protected]> wrote: >>>> >>>>> On 7/6/2021 10:34 AM, Jason Resch wrote: >>>>> >>>>> On Tue, Jul 6, 2021 at 12:27 PM 'Brent Meeker' via Everything List < >>>>> [email protected]> wrote: >>>>> >>>>>> And you're never going to find a being that behaves intelligently >>>>>> based on information that can be quantum erased. >>>>>> >>>>> You need only a quantum computer with enough qubits. >>>>> >>>>> Can you prove that? How does this quantum intelligence ever arrive at >>>>> a definite decision? >>>>> >>>> >>>> Prove? No. But I think I can justify it: >>>> >>>> 1. Quantum computers are Turing equivalent, they can compute anything a >>>> classical computer can. >>>> >>>> 2. Human brains are believed to operate according to physical laws, all >>>> known of which are computable. >>>> >>>> 3. Humans are conscious. >>>> >>>> 4. By any of: Chalmers's principle of "Organizational invariance", or >>>> "multiple realizability", or the "Generalized Anti-Zombie Principle", or >>>> the "computational theory of mind", a functionally equivalent computation >>>> to that of a conscious human brain will be equivalently conscious to that >>>> brain. >>>> >>>> 5. Quantum computers are reversible. >>>> >>>> By 1 & 2, a quantum computer can simulate a human brain. By 3 & 4, such >>>> an emulation will be conscious. By 5 any computation performed by a quantum >>>> computer can be quantum erased by reversing the circuit back to its >>>> starting state. >>>> >>>> It reaches a definite decision by virtue of completing its processing >>>> before ultimately being reversed. This prevents an outside observer from >>>> learning the decision, but it's made nonetheless during the course of the >>>> processing. >>>> >>> >>> How do you know that it has reached a definite decision? Without having >>> it print out some irreversible record? If it prints out a >>> (pseudo-)classical record, the initial state is not recoverable. >>> >>> Bruce >>> >> >> By either: >> >> 1. Analyzing the circuit >> 2. Having the circuit do something useful and verifiable (as in my >> factoring example) >> 3. Having the circuit output that it did observe a definite value but >> without reporting which value it observed (as in Deutsch's original example) >> > > > All of these involve decoherence. > #1. Is just looking at the program and verifying if the quantum computer runs it, it will reach a particular state in the course of it's operation, in the same way we might looks at the experimental setup of a quantum eraser setup and conclude when the photon is in this position in the apparatus that it will be in a particular state, even if that state is ultimately erased from our view later. You have to show that you can decohere part of your QC without decohering > the rest. I wish you luck! > #2. This is done by Shor's algorithm, which erases parts of the computation so other parts can successfully interfere to give the desired answer. Shor's algorithm has been implemented and run. #3. Would be another example of #2, reversing (and erasing) a prior measurement of a qubit put in a superposition after storing a bit indication that the qubit was a 0 or 1 (but not saying which). I believe Deutsch describes this experiment in his seminal paper that defined the universal quantum computer in 1985. Jason > Bruce > > -- > 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 to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/CAFxXSLQizo0ubknrt%2Bjk9grjmCoaMMQ8DScwE9KcS%2BmHVoszaQ%40mail.gmail.com > <https://groups.google.com/d/msgid/everything-list/CAFxXSLQizo0ubknrt%2Bjk9grjmCoaMMQ8DScwE9KcS%2BmHVoszaQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- 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 to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CA%2BBCJUih%2B56zCGiyxB9NkYE1a3ELdc07PSzeQYX__OeBV76tsg%40mail.gmail.com.
