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A Fluid Analog Model for Boundary Effects in Field Theory

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arxiv 0903.2694 v1 pith:T5PW3EJ7 submitted 2009-03-16 quant-ph hep-th

classification quant-phhep-th
keywords effectsfieldfluidtheoryanalogarguechangesdensity
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Quantum fluctuations in the density of a fluid with a linear phonon dispersion relation are studied. In particular, we treat the changes in these fluctuations due to non-classical states of phonons and to the presence of boundaries. These effects are analogous to similar effects in relativistic quantum field theory, and we argue that the case of the fluid is a useful analog model for effects in field theory. We further argue that the changes in the mean squared density are in principle observable by light scattering experiments.

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  1. Boundary effects in classical liquid density fluctuations at finite temperature

    cond-mat.stat-mech 2025-04 conditional novelty 5.0 of 10

    This paper derives exact finite-temperature expressions for density fluctuations, energy, free energy, and entropy of a phonon field confined between parallel plates with Dirichlet, Neumann, and mixed boundary conditi...

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