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Q: Fachverband Quantenoptik und Photonik

Q 21: Quanteneffekte (Offene und Wenigteilchensysteme)

Q 21.3: Vortrag

Dienstag, 20. März 2007, 11:00–11:15, 5E

Application of the quantum jump approach to a spin-boson model — •Jens Timo Neumann¹, Gerhard C. Hegerfeldt¹, and Lawrence S. Schulman² — ¹Institut für Theoretische Physik, Univ. Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany — ²Physics Department, Clarkson University, Potsdam, NY 13699-5820, USA

The quantum jump approach has proved itself as a useful tool for the investigation of many quantum optical issues as, e.g., photon statistics, cooperative effects of atoms in a trap, or quantum optical models for arrival-time measurements for ultracold atoms. It treats the limit of continuous photon modes under the assumption that the Markov property holds. In this talk, the domain of applicability of the quantum jump approach is extended beyond quantum optics. In particular, we investigate the application of the quantum jump approach to a spin-boson model. We also investigate by means of numerical examples the validity of the quantum jump approach as a convenient and accurate approximation to situations where one actually has to deal with a number of discrete bath modes.

1. G. C. Hegerfeldt, J. T. Neumann, and L. S. Schulman, J. Phys. A 39, 14447 (2006)
2. G. C. Hegerfeldt, J. T. Neumann, and L. S. Schulman, quant-ph/0610041 (2006), to appear in Phys. Rev. A [scheduled: issue 1 of Phys. Rev. A 75 (2007)]