All Questions
Tagged with unruh-effect acceleration
10
questions
2
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54
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What if acceleration changes in the Unruh effect?
Based on the Unruh effect, when a observer accelerates then he will see a thermal bath. mathematically the vacuum state for a non-inertial observer is
$$|0\rangle=\text{cos}^{-1}(r)\sum_{n=0}^{\infty}\...
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1
vote
1
answer
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Unruh Radiation from hovering?
I know that masses on their own don't produce Unruh radiation outside of black holes which produce a similar effect known as Hawking radiation. However, what if some observer hovers above the Earth ...
- 1,534
4
votes
1
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456
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How to derive the Unruh effect (or the thermofield double state) from the path integral?
I have been reading about the path integral approach to deriving the thermofield double state for the Minkowski vacuum in terms of the Rindler states:
\begin{equation}
\left|0_{M}(t=0)\right\rangle=\...
- 841
2
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1
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Davies & Unruh: vacuum temperature is proportional to acceleration. But $T$ is not a vector
Davies and Unruh showed that vacuum temperature is given by acceleration:
$$T = \frac{\hbar a}{2 \pi k_\mathrm B c}.$$
But acceleration is a vector, temperature is not. If vacuum temperature produces ...
user85598
0
votes
1
answer
80
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What is the physical interpretation of negative Unruh temperature?
Actually the Unruh temperature is vectorial since it is proportional to acceleration but derived for only one space dimension so at least positive and negative. What can negative Unruh temperature ...
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16
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2
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Can Quantum Field Theory not handle accelerated frames of reference?
Since Quantum Field Theory can't handle gravity, and gravity is mathematically equivalent to acceleration (equivalence principle), does this mean Quantum Field theory can't handle accelerated frames ...
- 949
0
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1
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118
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Usage of Rindler coordinates in studying Unruh Effect
When studying the Unruh Effect, Rindler coordinates are being used for the observer with constant acceleration. I am confused as to why Rindler coordinates are used as I do not see the motivation for ...
user161157
3
votes
1
answer
278
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How can Unruh radiation ever be real?
It is speculated that Unruh radiation exists for accelerating observers in flat spacetime. A thermometer in the frame will point at a higher value than for someone in a stationary frame. In the ...
user303670
0
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1
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113
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What is the Unruh temperature for an observer at near the speed of light?
I have read about the Unruh effect where an accelerated observer would experience a radiation that a non accelerated observer wouldn't.
According to wikipedia the formula goes like this:
My question ...
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3
votes
1
answer
501
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Unruh effect and relative acceleration
This is how I understand the Unruh effect: if a person (say, Bob) is moving with acceleration $a$ in his spaceship, then he will see an apparent event horizon around him--that is, the vacuum will ...
- 2,665