Quantum Filtering of Optical Coherent States
| Autor: | Wittmann, C., Elser, D., Andersen, U. L., Filip, R., Marek, P., Leuchs, G. |
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| Rok vydání: | 2007 |
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| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.78.032315 |
| Popis: | 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. Comment: 6 pages, 5 figures |
| Databáze: | arXiv |
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