Quantum master equation for collisional dynamics of massive particles with internal degrees of freedom
Abstract
We address the microscopic derivation of a quantum master equation in Lindblad form for the dynamics of a massive test particle with internal degrees of freedom, interacting through collisions with a background ideal gas. When either internal or centerofmass degrees of freedom can be treated classically, previously established equations are obtained as special cases. If in an interferometric setup the internal degrees of freedom are not detected at the output, the equation can be recast in the form of a generalized Lindblad structure, which describes nonMarkovian effects. The effect of internal degrees of freedom on centerofmass decoherence is considered in this framework.
 Publication:

Physical Review A
 Pub Date:
 October 2010
 DOI:
 10.1103/PhysRevA.82.042111
 arXiv:
 arXiv:1003.0998
 Bibcode:
 2010PhRvA..82d2111S
 Keywords:

 03.65.Yz;
 05.20.Dd;
 03.75.b;
 03.65.Ta;
 Decoherence;
 open systems;
 quantum statistical methods;
 Kinetic theory;
 Matter waves;
 Foundations of quantum mechanics;
 measurement theory;
 Quantum Physics
 EPrint:
 18 pages, 2 figures