Unruh's detector in the presence of Lorentz symmetry breaking

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dc.creatorRashidi, R.
dc.creatorKhosravi, N.
dc.creatorKhajeh, E.
dc.creatorSalehi, H.
dc.date2007-06-19
dc.date2007-09-05
dc.date.accessioned2026-07-07T13:09:33Z
dc.date.available2026-07-07T13:09:33Z
dc.descriptionWe investigate the quantum field theory of a Lorentz non-invariant model with a massive nonlinear dispersion relation in Minkowski space. The model involves some non-causal signals in the form of wave packets propagating with super-luminal group velocities. To avoid the problems with causality we characterize the causal sector of the theory by a cutoff condition excluding all super-luminal group velocities. It is argued that in the causal theory satisfying the energy positivity condition an Unruh's detector moving with a constant velocity with respect to the preferred frame does not detect any particle. But in a causal theory violating energy positivity, detection of a field quanta occurs. We comment on the origin of this particle creation.
dc.descriptionreplace with published version
dc.identifierhttps://arxiv.org/abs/0706.2767
dc.identifierhttp://arxiv.org/abs/0706.2767
dc.identifierAstrophys.Space Sci.310:333-337,2007
dc.identifierdoi:10.1007/s10509-007-9554-0
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228771
dc.subjectHigh Energy Physics - Theory
dc.titleUnruh's detector in the presence of Lorentz symmetry breaking
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