Moderate acceleration of an Unruh-DeWitt detector in a cylindrical cavity suppresses decoherence more effectively than the inertial case by smearing resonant modes and replacing off-resonant decay with oscillations.
How often does the Unruh-DeWitt detector click? Regularisation by a spatial profile
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abstract
We analyse within first-order perturbation theory the instantaneous transition rate of an accelerated Unruh-DeWitt particle detector whose coupling to a massless scalar field on four-dimensional Minkowski space is regularised by a spatial profile. For the Lorentzian profile introduced by Schlicht, the zero size limit is computed explicitly and expressed as a manifestly finite integral formula that no longer involves regulators or limits. The same transition rate is obtained for an arbitrary profile of compact support under a modified definition of spatial smearing. Consequences for the asymptotic behaviour of the transition rate are discussed. A number of stationary and nonstationary trajectories are analysed, recovering in particular the Planckian spectrum for uniform acceleration.
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The paper organizes important open questions in quantum gravity and quantum information into four themes without presenting new results or derivations.
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Cavity-controlled Inhibition of Decoherence in Accelerated Quantum Detectors
Moderate acceleration of an Unruh-DeWitt detector in a cylindrical cavity suppresses decoherence more effectively than the inertial case by smearing resonant modes and replacing off-resonant decay with oscillations.
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Rethinking quantum information in gravity and fields
The paper organizes important open questions in quantum gravity and quantum information into four themes without presenting new results or derivations.