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.
Kappa vacua: Infinite number of new vacua in two-dimensional quantum field theory
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We uncover an infinite number of vacua in two-dimensional quantum field theory, the Klein-Gordon field for simplicity, by conceiving a new mode that is classified by a real positive parameter $\kappa$. We show each mode has a distinct vacuum, say $\kappa$-vacuum. This new mode is a generalization of the Unruh-Minkowski mode. Moreover, the Minkowski and Rindler vacua are special cases of the $\kappa$-vacuum for $\kappa = 1$ and $\kappa \rightarrow \infty$, respectively.
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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.