Geometry of quantum states: New construction of positive maps
We provide a new class of positive maps in matrix algebras. The construction is based on the family of balls living in the space of density matrices of n-level quantum system. This class generalizes the celebrated Choi map and provide a wide family of entanglement witnesses which define a basic tool...
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| Veröffentlicht in: | Physics letters. A 2009-06, Vol.373 (27), p.2301-2305 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | We provide a new class of positive maps in matrix algebras. The construction is based on the family of balls living in the space of density matrices of
n-level quantum system. This class generalizes the celebrated Choi map and provide a wide family of entanglement witnesses which define a basic tool for analyzing quantum entanglement. |
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| ISSN: | 0375-9601 1873-2429 |
| DOI: | 10.1016/j.physleta.2009.04.068 |