Parts | Days | Selection | Search | Downloads | Help
Q: Quantenoptik und Photonik
Q 41: Quanteneffekte IV
Q 41.3: Talk
Wednesday, March 15, 2006, 11:10–11:25, HII
Decoherence and Classical Dynamics in Markovian Quantum Open Systems — •Olivier Brodier1 and A. M. Ozorio de Almeida2 — 1M.P.I.P.K.S. Nothnitzer Str. 38 D-01187 DRESDEN GERMANY — 2C.B.P.F. Rua Xavier Sigaud, 150 22290-180 RIO DE JANEIRO BRASIL
We derive a semiclassical propagator for the characteristic function, that is the Fourier transform of the Weyl representation of the density operator, for a general Markovian open quantum system with linear coupling to environment.
The theory describes quantitatively how decoherence time strongly depends on local phase space structure of the system.
The case of a quadratic Hamiltonian is calculated exactly. The general case is treated semiclassically in a doubled phase space.