Distillation of free entanglement from bound entangled states using weak measurements
arXiv:1309.2968 · doi:10.1103/PhysRevA.88.062320
Abstract
We propose a scheme for distillation of free bipartite entanglement from bipartite bound-entangled states. The crucial element of our scheme is an ancillary system that is coupled to the initial bound-entangled state via appropriate weak measurements. We show that in this protocol free entanglement can be always generated with nonzero probability by using a single copy of the bound-entangled state. We also derive a lower bound on the entanglement cost of the protocol, and conclude that, on average, applying weaker measurements results in relatively higher values of free entanglement as well as lower costs.
6 pages, 6 figures
References in corpus (16)
- Quantum Phase Transitions and Bipartite Entanglement
- Monogamy Inequality in terms of Negativity for Three-Qubit States
- All non-classical correlations can be activated into distillable entanglement
- Experimental multiparticle entanglement dynamics induced by decoherence
- All entangled states are useful for channel discrimination
- Balance between information gain and reversibility in weak measurement
- Quantum nonlocality does not imply entanglement distillability
- Experimental bound entanglement in a four-photon state
- Preparing the bound instance of quantum entanglement
- Complementarity Reveals Bound Entanglement of Two Twisted Photons
- Bound entanglement in the XY model
- Experimental Activation of Bound Entanglement
- Local Indistinguishability and Possibility of Hiding cbits in Activable Bound Entangled States
- Bound entanglement helps to reduce communication complexity
- Arboreal Bound Entanglement
- Creating multiphoton-polarization bound-entangled states