On the thermodynamics of moving bodies
We model the situation in which a photon detector moves with constant velocity in a Minkowski heat-bath by considering an Unruh-DeWitt detector, with variable energy gap ℏω, moving on a brane, at a non-zero (Unruh) temperature T due to acceleration in an orthogonal direction. We compute the angular...
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| Veröffentlicht in: | Journal of physics. Conference series 2010-04, Vol.222 (1), p.012040 |
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| creator | Russo, Jorge G Townsend, Paul K |
| description | We model the situation in which a photon detector moves with constant velocity in a Minkowski heat-bath by considering an Unruh-DeWitt detector, with variable energy gap ℏω, moving on a brane, at a non-zero (Unruh) temperature T due to acceleration in an orthogonal direction. We compute the angular response for a 2-brane. At low velocity we find agreement with the standard Doppler shift formula in the limit ℏω T in which the photon gas is classical; otherwise there is a discrepancy. At relativistic velocities our result disagrees with the standard formula even when ℏω T, and above a critical velocity there is no response from the detector within a 'backward' cone. We discuss potential implications for observations of the cosmic microwave background radiation. [Talk given by JGR at this 1st Mediterranean Conference in Classical and Quantum Gravity]. |
| doi_str_mv | 10.1088/1742-6596/222/1/012040 |
| format | Article |
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We compute the angular response for a 2-brane. At low velocity we find agreement with the standard Doppler shift formula in the limit ℏω T in which the photon gas is classical; otherwise there is a discrepancy. At relativistic velocities our result disagrees with the standard formula even when ℏω T, and above a critical velocity there is no response from the detector within a 'backward' cone. We discuss potential implications for observations of the cosmic microwave background radiation. 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| language | eng |
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| subjects | Acceleration Angular velocity Background radiation Big Bang theory Branes Cosmic microwave background Critical velocity Doppler effect Energy gap Photons Physics Quantum gravity Relativistic velocity Sensors |
| title | On the thermodynamics of moving bodies |
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