Determination of the maximum Global Quantum Discord via measurements of excitations in a cavity QED network
arXiv:1401.2934 · doi:10.1088/0953-4075/47/9/095501
Abstract
Multipartite Quantum Correlations is one of the most relevant indicator of the quantumness of a system in many body systems. This remarkable feature is in general difficult to characterize and the known definitions are hard to measure. Besides the efforts dedicated to solve this problem, the question of which is the best approach remains open. In this work, we study the Global Quantum Discord, GQD, as a bipartite and multipartite measure. We also check the limits of this definitions and present an experimental scheme to determine the maximum of the GQD via the measurements of the system's excitations, during the time evolution of the present system.
References in corpus (10)
- Quantum discord and the power of one qubit
- An Elementary Quantum Network of Single Atoms in Optical Cavities
- Photon blockade induced Mott transitions and XY spin models in coupled cavity arrays
- Quantum Many-Body Phenomena in Coupled Cavity Arrays
- Distributed quantum computation via optical fibres
- Conservation law for distributed entanglement of formation and quantum discord
- Experimental realization of a quantum phase transition of polaritonic excitations
- Global quantum correlations in finite-size spin chains
- Estimating entanglement monotones with a generalization of the Wootters formula
- Monogamy of Quantum Discord by Multipartite Correlations