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Computable measure of entanglement

2002; American Physical Society; Volume: 65; Issue: 3 Linguagem: Inglês

10.1103/physreva.65.032314

1538-4446

Guifré Vidal, Reinhard F. Werner,

Quantum Mechanics and Applications

We present a measure of entanglement that can be computed effectively for any mixed state of an arbitrary bipartite system. We show that it does not increase under local manipulations of the system, and use it to obtain a bound on the teleportation capacity and on the distillable entanglement of mixed states.