Quantum nonlocality without entanglement and state discrimination measures
Fuente:
arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866918070051667968 |
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| author | Murshid, Shayeef Gupta, Tathagata Russo, Vincent Bandyopadhyay, Somshubhro |
| author_facet | Murshid, Shayeef Gupta, Tathagata Russo, Vincent Bandyopadhyay, Somshubhro |
| contents | An ensemble of product states is said to exhibit "quantum nonlocality without entanglement" if the states cannot be optimally discriminated by local operations and classical communication (LOCC). We show that this property can depend on the measure of state discrimination. We present a family of ensembles, each consisting of six linearly independent, equally probable product states for which LOCC fails to achieve optimal minimum-error discrimination but succeeds in achieving optimal unambiguous discrimination. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_20560 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum nonlocality without entanglement and state discrimination measures Murshid, Shayeef Gupta, Tathagata Russo, Vincent Bandyopadhyay, Somshubhro Quantum Physics An ensemble of product states is said to exhibit "quantum nonlocality without entanglement" if the states cannot be optimally discriminated by local operations and classical communication (LOCC). We show that this property can depend on the measure of state discrimination. We present a family of ensembles, each consisting of six linearly independent, equally probable product states for which LOCC fails to achieve optimal minimum-error discrimination but succeeds in achieving optimal unambiguous discrimination. |
| title | Quantum nonlocality without entanglement and state discrimination measures |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2506.20560 |