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Classical and quantum field theory in a box with moving boundaries: A numerical study of the Dynamical Casimir Effect

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arxiv 2404.06166 v2 pith:NW6ERFSP submitted 2024-04-09 quant-ph gr-qchep-th

classification quant-phgr-qchep-th
keywords fieldtheoryquantumboundariesboundarycasimirclassicaldimensions
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We present a detailed description of a quantum scalar field theory within a flat spacetime confined to a cavity with perfectly reflecting moving boundaries. Moreover, we establish an equivalence between this time-dependent setting and a field theory on an acoustic metric with static Dirichlet boundary conditions. We discuss the classical and quantum aspects of the theory from the latter perspective, accompanied by the introduction of novel numerical techniques designed for the (nonperturbative) computation of particle production attributed to the Dynamical Casimir effect, applicable to arbitrary boundary trajectories. As an illustrative example of these methodologies, we compute the particle production for a massless field in 1+1 dimensions. Notably, our approaches readily extend to encompass scenarios involving massive fields and higher dimensions

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Robustness of analogue Hawking radiation in cavities with moving boundaries

    quant-ph 2025-07 conditional novelty 6.0 of 10

    Thermal Hawking-like radiation in moving-mirror cavities is robust only for selected expanding configurations and low frequencies; all other configurations tested show non-thermal spectra.

  2. Particles in finite volumes and a toy model of decaying neutrons

    hep-ph 2025-04 reject novelty 4.0 of 10

    A toy scalar model of neutron decay suggests finite-volume effects and initial neutron-daughter correlations can shift the predicted neutron lifetime to about 887 seconds, but the agreement is obtained by tuning a parameter.

  3. Analogue gravity with Bose-Einstein condensates

    gr-qc 2025-12 conditional novelty 2.0 of 10

    Phonons in a Bose–Einstein condensate behave as a massless scalar field on an acoustic spacetime; these notes derive that mapping in detail and apply it to superradiance and analogue Hawking radiation.

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