Realization of Arbitrary Positive-Operator-Value Measurement of Single Atomic Qubit via Cavity QED |
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| Authors: | HAN Yang WU Wei WU Chun-Wang DAI Hong-Yi LI Cheng-Zu |
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| Affiliation: | Department of Physics, National University of Defense Technology, Changsha 410073 |
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| Abstract: | Positive-operator-value measurement (POVM) is the most general class of quantum measurement. We propose a scheme to deterministically implement arbitrary POVMs of single atomic qubit via cavity QED catalysed by only one ancilla atomic qubit. By appropriately entangling two atomic qubits and sequentially measuring the ancilla qubit, any POVM can be implemented step by step. As an application of our scheme, the realization of a specific POVM for optimal unambiguous discrimination (OUD) between two nonorthogonal states is given. |
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| Keywords: | 03 67 -a 42 50 Dv |
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