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- Title
Multipartite quantum and classical correlations in symmetric n-qubit mixed states.
- Authors
Giorgi, Gian; Campbell, Steve
- Abstract
We discuss how to calculate genuine multipartite quantum and classical correlations in symmetric, spatially invariant, mixed n-qubit density matrices. We show that the existence of symmetries greatly reduces the amount of free parameters to be optimized in order to find the optimal measurement that minimizes the conditional entropy in the discord calculation. We apply this approach to the states exhibited dynamically during a thermodynamic protocol to extract maximum work. We also apply the symmetry criterion to a wide class of physically relevant cases of spatially homogeneous noise over multipartite entangled states. Exploiting symmetries we are able to calculate the non-local and genuine quantum features of these states and note some interesting properties.
- Subjects
QUANTUM entanglement; DENSITY matrices; QUBITS; MIXED state (Superconductors); STATISTICAL correlation
- Publication
Quantum Information Processing, 2016, Vol 15, Issue 11, p4599
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-016-1421-x