Demonstration of Einstein–Podolsky–Rosen steering with enhanced subchannel discrimination
| Autor: | Kai Sun, Ya Xiao, Yu-Chun Wu, Xiao-Ye Xu, Xiang-Jun Ye, Guang-Can Guo, Chuan-Feng Li, Jin-Shi Xu, Jing-Ling Chen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Computer Networks and Communications
Computer science FOS: Physical sciences Quantum channel Quantum entanglement 01 natural sciences lcsh:QA75.5-76.95 010305 fluids & plasmas symbols.namesake Quantum nonlocality 0103 physical sciences Computer Science (miscellaneous) EPR paradox Quantum information 010306 general physics Quantum Computer Science::Information Theory Quantum optics Quantum Physics Statistical and Nonlinear Physics Quantum evolution lcsh:QC1-999 Computer Science::Performance Computational Theory and Mathematics symbols lcsh:Electronic computers. Computer science Quantum Physics (quant-ph) Algorithm lcsh:Physics Optics (physics.optics) Physics - Optics |
| Zdroj: | npj Quantum Information, Vol 4, Iss 1, Pp 1-7 (2018) |
| ISSN: | 2056-6387 |
| DOI: | 10.1038/s41534-018-0067-1 |
| Popis: | Einstein-Podolsky-Rosen (EPR) steering describes a quantum nonlocal phenomenon in which one party can nonlocally affect the other's state through local measurements. It reveals an additional concept of quantum nonlocality, which stands between quantum entanglement and Bell nonlocality. Recently, a quantum information task named as subchannel discrimination (SD) provides a necessary and sufficient characterization of EPR steering. The success probability of SD using steerable states is higher than using any unsteerable states, even when they are entangled. However, the detailed construction of such subchannels and the experimental realization of the corresponding task are still technologically challenging. In this work, we designed a feasible collection of subchannels for a quantum channel and experimentally demonstrated the corresponding SD task where the probabilities of correct discrimination are clearly enhanced by exploiting steerable states. Our results provide a concrete example to operationally demonstrate EPR steering and shine a new light on the potential application of EPR steering. 16 pages, 8 figures, appendix included |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|