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Kappa vacua: Enhancing the Unruh temperature
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abstract
We elaborate more on $\kappa$-mode, a mode that was found by a combination of Rindler modes in the right and left Rindler wedges with opposite sign norms. We find a relation between different kappa vacua, which is a generalization of the thermofield double state. However, a $\kappa$-vacuum can be written in terms of the Rindler vacuum as the thermofield double state, with a modified Unruh temperature of $T_{\kappa}=\frac{\hbar a}{2\pi c k_B}\,\kappa$. Consequently, when a uniformly accelerated observer with an acceleration $a$ is immersed in a $\kappa$-vacuum, they perceive a thermal bath. However, the temperature experienced by the observer is a modified Unruh temperature denoted as $T_{\kappa}$. Remarkably, the Unruh temperature can be enhanced by an arbitrary factor of $\kappa$.
Forward citations
Cited by 3 Pith papers
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Modulated Accelerating Mirrors as a Physical Realization of the Kappa-Gamma Vacuum
A modulated Carlitz-Willey mirror realizes the κγ vacuum on future null infinity: the trajectory sets the temperature, the boundary pump phase sets the squeeze angle.
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Kappa Plane Wave Modes and Continuous Squeezing in Quantum Field Theory
A one-parameter family of flat-spacetime vacua, built from Minkowski plane waves with exponential weights, is shown to be a continuous-mode squeezed vacuum with tanh r(ν) = e^(−πν/κ), reducing to the Minkowski vacuum as κ→0.
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A Tunable Unruh Effect: Accelerated Detectors in Kappa-Rindler Vacua
An accelerated detector in a kappa-deformed version of the Minkowski vacuum sees a perfect thermal bath at temperature T = κ times the standard Unruh temperature.
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