TY - JOUR
T1 - Quantum dissipation and decay in a medium
AU - Joichi, I.
AU - Matsumoto, Sh
AU - Yoshimura, M.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1998
Y1 - 1998
N2 - Quantum dissipation in a thermal environment is investigated, using the path-integral approach. The reduced density matrix of the harmonic oscillator system coupled to a thermal bath of oscillators is derived for an arbitrary spectrum of bath oscillators. Time evolution and the end point of the two-body decay of unstable particles are then elucidated: After early transient times unstable particles undergo the exponential decay, followed by the power-law decay and finally ending in a mixed state of residual particles containing contributions from both on and off the mass shell, whose abundance does not suffer from the Boltzmann suppression.
AB - Quantum dissipation in a thermal environment is investigated, using the path-integral approach. The reduced density matrix of the harmonic oscillator system coupled to a thermal bath of oscillators is derived for an arbitrary spectrum of bath oscillators. Time evolution and the end point of the two-body decay of unstable particles are then elucidated: After early transient times unstable particles undergo the exponential decay, followed by the power-law decay and finally ending in a mixed state of residual particles containing contributions from both on and off the mass shell, whose abundance does not suffer from the Boltzmann suppression.
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U2 - 10.1103/PhysRevA.57.798
DO - 10.1103/PhysRevA.57.798
M3 - Article
AN - SCOPUS:0001528017
VL - 57
SP - 798
EP - 805
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 2
ER -