Publication details
Optimal unambiguous comparison of two unknown squeezed vacua
| Authors | |
|---|---|
| Year of publication | 2011 |
| Type | Article in Periodical |
| Magazine / Source | Physical Review A |
| MU Faculty or unit | |
| Citation | |
| Web | http://arxiv.org/abs/1010.2937 |
| Doi | http://dx.doi.org/10.1103/PhysRevA.83.012313 |
| Field | Theoretical physics |
| Keywords | Quantum information processing; squeezed vacuum states; comparison |
| Description | We propose a scheme for unambiguous state comparison (USC) of two unknown squeezed vacuum states of an electromagnetic field. Our setup is based on linear optical elements and photon-number detectors, and achieves optimal USC in an ideal case of unit quantum efficiency. In realistic conditions, i.e., for non-unit quantum efficiency of photodetectors, we evaluate the probability of getting an ambiguous result as well as the reliability of the scheme, thus showing its robustness in comparison to previous proposals. |
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