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Abstract
In an initially uncorrelated mixed separable bi-partite system, quantum correlations can emerge under the action of a local measurement or local noise [1]. We analyse this counter-intuitive phenomenon using quantum discord as a quantifier. We then relate changes in quantum discord to system-environment correlations between the system in a mixed state and some purifying environmental mode using the Koashi-Winter inequality. On this basis, we suggest an interpretation of discord as a byproduct of transferring entanglement and correlations around the different subsystems of a global pure state.
Original language | English |
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Article number | 014040 |
Number of pages | 3 |
Journal | Physica Scripta |
Volume | T160 |
DOIs | |
Publication status | Published - Apr 2014 |
Keywords
- discord
- entanglement
- non-classical
- correlations
- tripartite Gaussian states
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Dive into the research topics of 'Quantum discord from system-environment correlations'. Together they form a unique fingerprint.Projects
- 1 Finished
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QUEST: The Quest for Ultimate Electromagnetics using Spatial Transformations (QUEST)
Korolkova, N. (PI) & Leonhardt, U. (CoI)
1/07/11 → 30/06/16
Project: Standard