Quantum Filtering of Optical Coherent States
Quantum Physics
2009-11-13 v3
Abstract
We propose and experimentally demonstrate non-destructive and noiseless removal (filtering) of vacuum states from an arbitrary set of coherent states of continuous variable systems. Errors i.e. vacuum states in the quantum information are diagnosed through a weak measurement, and on that basis, probabilistically filtered out. We consider three different filters based on on/off detection phase stabilized and phase randomized homodyne detection. We find that on/off etection, optimal in the ideal theoretical setting, is superior to the homodyne strategy in a practical setting.
Cite
@article{arxiv.0704.1918,
title = {Quantum Filtering of Optical Coherent States},
author = {C. Wittmann and D. Elser and U. L. Andersen and R. Filip and P. Marek and G. Leuchs},
journal= {arXiv preprint arXiv:0704.1918},
year = {2009}
}
Comments
6 pages, 5 figures