Evolution of entanglement for quantum mixed states
Abstract
A simple relation is introduced for concurrence to describe how much the entanglement of a bipartite system is at least left if either (or both) subsystem undergoes an arbitrary physical process. This provides a lower bound for concurrence of mixed states (pure states are included) in contrast to the upper bound given by Konrad [Nat. Phys. 4, 99 (2008)]. Our results are also suitable for general high-dimensional bipartite quantum systems.
- Publication:
-
Physical Review A
- Pub Date:
- December 2008
- DOI:
- 10.1103/PhysRevA.78.062330
- arXiv:
- arXiv:0812.3959
- Bibcode:
- 2008PhRvA..78f2330Y
- Keywords:
-
- 03.67.Mn;
- 42.50.-p;
- Entanglement production characterization and manipulation;
- Quantum optics;
- Quantum Physics
- E-Print:
- 6 pages and 1 figure