Abstract
For a pure non-markovian dephasing model we derive analytic expressions of coherent information, quantum discord, and entanglement. We find that for the cases of the initial Werner states, the dynamical behavior of coherent information is similar to that of quantum discord but different from that of entanglement. Coherent information, as well as quantum discord, can reveal the quantum correlations in some mixed-states, in which the entanglement is zero.
| Original language | English |
|---|---|
| Pages (from-to) | 589-594 |
| Number of pages | 6 |
| Journal | Communications in Theoretical Physics |
| Volume | 57 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 2012 |
Keywords
- coherent information
- entanglement
- quantum discord