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Quantum Physics

arXiv:0704.1918 (quant-ph)
[Submitted on 16 Apr 2007 (v1), last revised 29 Sep 2008 (this version, v3)]

Title:Quantum Filtering of Optical Coherent States

Authors:C. Wittmann, D. Elser, U. L. Andersen, R. Filip, P. Marek, G. Leuchs
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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.
Comments: 6 pages, 5 figures
Subjects: Quantum Physics (quant-ph)
Cite as: arXiv:0704.1918 [quant-ph]
  (or arXiv:0704.1918v3 [quant-ph] for this version)
  https://doi.org/10.48550/arXiv.0704.1918
Related DOI: https://doi.org/10.1103/PhysRevA.78.032315

Submission history

From: Christoffer Wittmann [view email]
[v1] Mon, 16 Apr 2007 15:55:42 UTC (64 KB)
[v2] Mon, 13 Aug 2007 16:41:28 UTC (64 KB)
[v3] Mon, 29 Sep 2008 13:53:29 UTC (334 KB)
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