Dynamics of quantum discord in the purification process
arXiv:1101.2568 · doi:10.1016/j.physa.2012.03.024
Abstract
We investigate the dynamics of quantum discord during the purification process. In the case of Werner states, it is shown that quantum discord is increased after a round of purification protocol. Furthermore, quantum mutual information and classical correlation is also increased during this process.Wealso give an analytic expression for a class of higher dimensional states which have additive quantum discord.
4 pages, 3 figures
References in corpus (15)
- Quantum discord and the power of one qubit
- Necessary and sufficient condition for non-zero quantum discord
- Sudden Death of Entanglement
- Robustness of quantum discord to sudden death
- Classical and quantum correlations under decoherence
- Interpreting quantum discord through quantum state merging
- Operational interpretations of quantum discord
- Vanishing quantum discord is necessary and sufficient for completely positive maps
- Linking Quantum Discord to Entanglement in a Measurement
- On the role of entanglement and correlations in mixed-state quantum computation
- All non-classical correlations can be activated into distillable entanglement
- Conservation law for distributed entanglement of formation and quantum discord
- Entanglement irreversibility from quantum discord and quantum deficit
- Detecting Multipartite Classical States and their Resemblances
- Locally Inaccessible Information as a Fundamental Ingredient to Quantum Information