Quasiequilibria in open quantum systems

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.032111· OSTI ID:21408370

Walls, Jamie D ^[1]

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1. Department of Chemistry, University of Miami, Coral Gables, Florida 33124 (United States)

In this work, the steady-state or quasiequilibrium resulting from periodically modulating the Liouvillian of an open quantum system, L-circumflex-circumflex(t), is investigated. It is shown that differences between the quasiequilibrium and the instantaneous equilibrium occur due to nonadiabatic contributions from the gauge field connecting the instantaneous eigenstates of L-circumflex-circumflex(t) to a fixed basis. These nonadiabatic contributions are shown to result in an additional rotation and/or depolarization for a single spin-1/2 in a time-dependent magnetic field and to affect the thermal mixing of two coupled spins interacting with a time-dependent magnetic field.

• OSTI ID: 21408370
• Journal Information: Physical Review. A, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevA.81.032111; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DEPOLARIZATION
EIGENSTATES
EQUILIBRIUM
MAGNETIC FIELDS
MIXING
PERIODICITY
ROTATION
SPIN
STEADY-STATE CONDITIONS
TIME DEPENDENCE
ANGULAR MOMENTUM
MOTION
PARTICLE PROPERTIES
VARIATIONS