Robust entanglement preparation against noise by controlling spatial indistinguishability
| Autor: | Farzam Nosrati, Giuseppe Compagno, Alessia Castellini, Rosario Lo Franco |
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| Přispěvatelé: | Farzam Nosrati, Alessia Castellini, Giuseppe Compagno, Rosario Lo Franco |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Computer Networks and Communications
Computer science Initialization FOS: Physical sciences Context (language use) Quantum entanglement Noise (electronics) Measure (mathematics) lcsh:QA75.5-76.95 Settore FIS/03 - Fisica Della Materia Entanglement Computer Science (miscellaneous) Statistical physics Quantum Quantum Physics Quantum resources Statistical and Nonlinear Physics lcsh:QC1-999 Quantum technology Computational Theory and Mathematics Qubit Open quantum system lcsh:Electronic computers. Computer science Quantum Physics (quant-ph) lcsh:Physics Quantum indistinguishability |
| Zdroj: | npj Quantum Information, Vol 6, Iss 1, Pp 1-7 (2020) |
| Popis: | Initialization of composite quantum systems into highly entangled states is usually a must to allow their use for quantum technologies. However, the presence of unavoidable noise in the preparation stage makes the system state mixed, thus limiting the possibility of achieving this goal. Here we address this problem in the context of identical particle systems. We define the entanglement of formation for an arbitrary state of two identical qubits within the operational framework of spatially localized operations and classical communication (sLOCC). We then introduce an entropic measure of spatial indistinguishability under sLOCC as an information resource. We show that spatial indistinguishability, even partial, may shield entanglement from noise, guaranteeing Bell inequality violations. These results prove the fundamental role of particle identity as a control for efficient noise-protected entanglement generation. 11 pages, 7 figures. Improved version. To appear on npj Quantum Information |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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