Quantum Trajectories for Realistic Detection
Abstract
Quantum trajectories describe the stochastic evolution of an open quantum system conditioned on continuous monitoring of its output, such as by an ideal photodetector. Here we derive (non-Markovian) quantum trajectories for realistic photodetection, including the effects of efficiency, dead time, bandwidth, electronic noise, and dark counts. We apply our theory to a realistic cavity QED scenario and investigate the impact of such detector imperfections on the conditional evolution of the system state. A practical theory of quantum trajectories with realistic detection will be essential for experimental and technological applications of quantum feedback in many areas.
Cite
@article{arxiv.quant-ph/0112129,
title = {Quantum Trajectories for Realistic Detection},
author = {P. Warszawski and H. M. Wiseman and H. Mabuchi},
journal= {arXiv preprint arXiv:quant-ph/0112129},
year = {2009}
}
Comments
5 pages, 4 figures (3 .eps included, 1 jpeg as an additional file). To be published in Phys. Rev. A