Open System Dynamics with Non-Markovian Quantum Trajectories

Walter T. Strunz, Lajos Diósi, and Nicolas Gisin
Phys. Rev. Lett. 82, 1801 – Published 1 March 1999
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Abstract

A non-Markovian stochastic Schrödinger equation for a quantum system coupled to an environment of harmonic oscillators is presented. The ensemble average recovers the reduced density matrix without approximation and hence it allows one to determine open system dynamics with strong and non-Markovian environmental effects in a very efficient way. We demonstrate the power of our approach with several illustrative examples. First, we discuss a measurement-type situation, then a two-state system strongly coupled to a non-Markovian environment, exhibiting decays and revivals. Further examples showing the remarkable features of our new approach to non-Markovian open system dynamics are discussed, for instance, the possibility to shift the “Heisenberg cut” between system and environment.

  • Received 24 March 1998

DOI:https://doi.org/10.1103/PhysRevLett.82.1801

©1999 American Physical Society

Authors & Affiliations

Walter T. Strunz1, Lajos Diósi2, and Nicolas Gisin3

  • 1Fachbereich Physik, Universität GH Essen, 45117 Essen, Germany
  • 2Research Institute for Particle and Nuclear Physics, 1525 Budapest 114, P.O. Box 49, Hungary
  • 3Group of Applied Physics, University of Geneva, 1211 Geneva 4, Switzerland

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Issue

Vol. 82, Iss. 9 — 1 March 1999

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