Some features of the state-space trajectories followed by robust entangled four-qubit states during decoherence
In a recent work (Borras et al., Phys. Rev. A 79 (2009) 022108), we have determined, for various decoherence channels, four-qubit initial states exhibiting the most robust possible entanglement. Here, we explore some geometrical features of the trajectories in state space generated by the decoherenc...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2010 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/125543 |
| Acceso en línea: | http://hdl.handle.net/11336/125543 |
| Access Level: | acceso abierto |
| Palabra clave: | DECOHERENCE ENTANGLEMENT https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | In a recent work (Borras et al., Phys. Rev. A 79 (2009) 022108), we have determined, for various decoherence channels, four-qubit initial states exhibiting the most robust possible entanglement. Here, we explore some geometrical features of the trajectories in state space generated by the decoherence process, connecting the initially robust pure state with the completely decohered mixed state obtained at the end of the evolution. We characterize these trajectories by recourse to the distance between the concomitant time-dependent mixed state and different reference states. |
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