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- W4362470505 abstract "Several approaches to quantum gravity suggest violations of Lorentz symmetry as low-energy signatures. This article uses a concrete Lorentz-violating quantum field theory to study different inertial vacua. We show that they are unitarily inequivalent and that the vacuum in one inertial frame appears, in a different inertial frame, to be populated with particles of arbitrarily high momenta. At first sight, this poses a critical challenge to the physical validity of Lorentz-violating theories, since we do not witness vacuum excitations by changing inertial frames. Nevertheless, we demonstrate that inertial Unruh-De Witt detectors are insensitive to these effects. We also discuss the Hadamard condition for this Lorentz-violating theory." @default.
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- W4362470505 date "2023-06-01" @default.
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- W4362470505 title "Are inertial vacua equivalent in Lorentz-violating theories? Does it matter?" @default.
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- W4362470505 doi "https://doi.org/10.1016/j.aop.2023.169303" @default.
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