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A scheme of quantum state discrimination over specified states via weak-value measurement |
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| Authors: | Xi Chen Hong-Yi Dai Bo-Yang Liu Ming Zhang |
| Institution: | 1. College of Artificial Intelligence, National University of Defense Technology, Changsha, 410073, China;2. Department of Physics, National University of Defense Technology, Changsha, 410073, China;3. Interdisciplinary Center for Quantum Information, National University of Defense Technology, Changsha, 410073, China |
| Abstract: | The commonly adopted projective measurements are invalid in the specified task of quantum state discrimination when the discriminated states are superposition of planar-position basis states whose complex-number probability amplitudes have the same magnitude but different phases. Therefore we propose a corresponding scheme via weak-value measurement and examine the feasibility of this scheme. Furthermore, the role of the weak-value measurement in quantum state discrimination is analyzed and compared with one in quantum state tomography in this Letter. |
| Keywords: | Weak-value measurement Quantum state discrimination Quantum state tomography Planar laser-energy distribution |
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