Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 798-805 |
| Number of pages | 8 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 57 |
| Issue number | 2 |
| Publication status | Published - Feb 1998 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
Cite this
Quantum dissipation and decay in a medium. / Joichi, I.; Matsumoto, Sh; Yoshimura, Motohiko.
In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 57, No. 2, 02.1998, p. 798-805.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Quantum dissipation and decay in a medium
AU - Joichi, I.
AU - Matsumoto, Sh
AU - Yoshimura, Motohiko
PY - 1998/2
Y1 - 1998/2
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.
UR - http://www.scopus.com/inward/record.url?scp=0001528017&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0001528017&partnerID=8YFLogxK
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 -