A scheme of quantum state discrimination over specified states via weak-value measurement
| Autor: | Ming Zhang, Xi Chen, Hong-Yi Dai, Bo-Yang Liu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Basis (linear algebra) General Physics and Astronomy Magnitude (mathematics) Quantum tomography 01 natural sciences 010305 fluids & plasmas Task (project management) Superposition principle Amplitude Quantum state Scheme (mathematics) 0103 physical sciences Statistical physics 010306 general physics |
| Zdroj: | Physics Letters A. 382:942-948 |
| ISSN: | 0375-9601 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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