Completely positive maps within the framework of direct-sum decomposition of state space
| Autor: | Liu, Longjiang, Tong, D. M. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 90, 012305 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.90.012305 |
| Popis: | We investigate completely positive maps for an open system interacting with its environment. The families of the initial states for which the reduced dynamics can be described by a completely positive map are identified within the framework of direct-sum decomposition of state space. They includes not only separable states with vanishing or nonvanishing quantum discord but also entangled states. A general expression of the families as well as the Kraus operators for the completely positive maps are explicitly given. It significantly extends the previous results. Comment: 7 pages, no figure |
| Databáze: | arXiv |
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