On 8/30/2019 4:55 PM, Lawrence Crowell wrote:
On Friday, August 30, 2019 at 5:36:25 PM UTC-5, Brent wrote:
On 8/30/2019 1:03 PM, Lawrence Crowell wrote:
Virtual particles are not directly detectable. It is odd however
that an observer in an accelerated frame should in fact observe
them. Accelerated motion transforms virtual particles into a
black body spectrum of radiation with 1K for 10^{21}m/sec^2. This
is Unruh radiation that is related to Hawking radiation from a
black hole. A black hole has a set of Boulware vacua, where empty
space in one is equivalent to another with radiation. This is
odd, and a probe on an accelerated frame will record a
temperature, even if another observer on an inertial frame
witnesses no such radiation.
But the inertial observer can see the accelerated detector click
and the accelerated thermometer rise in temperature.
Brent
That should be the case. Ford, can't remember his first name, I think
says no.
I think Wald says that for the inertial observer it appears that the
accelerated detector/thermometer is interacting with the vacuum and
producing the particles around it that provide the clicks and temperature.
Brent
I got a bit of attention with a paper last decade I wrote where I
suggested how to measure this. If you propel a body at these extreme
accelerations and then catch it the body should have a higher
temperature. From an inertial frame perspective this added temperature
could be thought of the surface of the material, which has a sort of
quantum atmosphere, interacting with the vacuum in an asymmetric fashion.
LC
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