Lowering Helstrom Bound with non-standard coherent states
| Autor: | Curado, Evaldo M. F., Faci, Sofiane, Gazeau, Jean-Pierre, Noguera, Diego |
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| Rok vydání: | 2020 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/JOSAB.428637 |
| Popis: | In quantum information processing, {using a receiver device to differentiate between two nonorthogonal states leads to a quantum error probability. The minimum possible error is} known as the Helstrom bound. In this work we study and compare quantum limits for states which generalize the Glauber-Sudarshan coherent states, like non-linear, Perelomov, Barut-Girardello, and (modified) Susskind-Glogower coherent states. For some of these, we show that the Helstrom bound can be significantly lowered and even vanish in specific regimes. Comment: 31 pages, 25 figures |
| Databáze: | arXiv |
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