Volume 77, Number 5, March 2007
Article Number 50007
Number of page(s) 5
Section General
Published online 22 February 2007
EPL, 77 (2007) 50007
DOI: 10.1209/0295-5075/77/50007

Monitoring approach to open quantum dynamics using scattering theory

K. Hornberger

Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universitat München - Theresienstraße 37, 80333 Munich, Germany

received 11 December 2006; accepted in final form 16 January 2007; published March 2007
published online 22 February 2007

It is shown how S-matrix theory and the concept of continuous quantum measurements can be combined to yield Markovian master equations which describe the environmental interaction non-perturbatively. The method is then applied to obtain the master equation for the effects of a gas on the internal dynamics of an immobile complex quantum system, such as a trapped molecule, in terms of the exact multi-channel scattering amplitudes.

03.65.Yz - Decoherence; open systems; quantum statistical methods.
03.65.Nk - Scattering theory.
34.10.+x - General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.).

© Europhysics Letters Association 2007