Unruh effect in quantum information beyond the single-mode approximation
We address the validity of the single-mode approximation that is commonly invoked in the analysis of entanglement in noninertial frames and in other relativistic quantum-information scenarios. We show that the single-mode approximation is not valid for arbitrary states, finding corrections to previo...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2010 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:dnet:digitalcsic_::e12aa505eaf7bb2fbd82503ca8a445b8 |
| Acceso en línea: | http://hdl.handle.net/10261/93123 |
| Access Level: | acceso abierto |
| Palabra clave: | Open systems [PACS] Decoherence [PACS] Entanglement measures, witnesses, and other characterizations quantum statistical methods [PACS] Quantum fields in curved spacetime |
| Sumario: | We address the validity of the single-mode approximation that is commonly invoked in the analysis of entanglement in noninertial frames and in other relativistic quantum-information scenarios. We show that the single-mode approximation is not valid for arbitrary states, finding corrections to previous studies beyond such approximations in the bosonic and fermionic cases. We also exhibit a class of wave packets for which the single-mode approximation is justified subject to the peaking constraints set by an appropriate Fourier transform. © 2010 The American Physical Society. |
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