Two-mode squeezed states as Schrodinger-cat-like states
| Autor: | Oudot, E., Sekatski, P., Fröwis, F., Gisin, N., Sangouard, N. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | J. Opt. Soc. Am. B 32, 2190 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/JOSAB.32.002190 |
| Popis: | In recent years, there has been an increased interest in the generation of superposition of coherent states with opposite phases, the so-called photonic Schrodinger-cat states. These experiments are very challenging and so far, cats involving small photon numbers only have been implemented. Here, we propose to consider two-mode squeezed states as examples of a Schrodinger-cat-like state. In particular, we are interested in several criteria aiming to identify quantum states that are macroscopic superpositions in a more general sense. We show how these criteria can be extended to continuous variable entangled states. We apply them to various squeezed states, argue that two-mode squeezed vacuum states belong to a class of general Schrodinger-cat states and compare the size of states obtained in several experiments. Our results not only promote two-mode squeezed states for exploring quantum effects at the macroscopic level but also provide direct measures to evaluate their usefulness for quantum metrology. Comment: 5 pages + appendix, one figure |
| Databáze: | arXiv |
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