Exact Green's functions for localized irreversible potentials
DOI:
https://doi.org/10.31349/RevMexFis.69.050401Keywords:
Point-like interactions, Maxwell's demon, Green's functionsAbstract
We study the quantum-mechanical problem of scattering caused by a localized obstacle that breaks spatial and temporal reversibility. Accordingly, we follow Maxwell's prescription to achieve a violation of the second law of thermodynamics by means of a momentum-dependent interaction in the Hamiltonian, resulting in what is known as Maxwell's demon. We obtain the energy-dependent Green's function analytically, as well as its meromorphic structure. The poles lead directly to the solution of the evolution problem, in the spirit of M. Moshinsky's work published in the 1950s. Symmetric initial conditions are evolved in this way, showing important differences between classical and wave-like irreversibility in terms of collapses and revivals of wave packets. Our setting can be generalized to other wave operators, e.g. electromagnetic cavities in a classical regime.
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Copyright (c) 2023 Jorge Israel Castro-Alatorre, David Condado, Emerson Sadurni
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