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RESEARCH PRODUCT
Dynamics of quantum discord of two coupled spin-1/2’s subjected to time-dependent magnetic fields
Tatiana MihaescuIulia GhiuRoberto GrimaudoAurelian IsarAntonino Messinasubject
010302 applied physicsPhysicsBell stateQuantum discordTime evolutionGeneral Physics and Astronomy02 engineering and technologyQuantum entanglement021001 nanoscience & nanotechnology01 natural sciencesAction (physics)lcsh:QC1-999Magnetic fieldQuantum Discord Concurrence Interacting QubitsQuantum mechanics0103 physical sciences0210 nano-technologyQuantumlcsh:PhysicsSpin-½description
Abstract We describe the dynamics of quantum discord of two interacting spin-1/2’s subjected to controllable time-dependent magnetic fields. The exact time evolution of discord is given for various input mixed states consisting of classical mixtures of two Bell states. The quantum discord manifests a complex oscillatory behaviour in time and is compared with that of quantum entanglement, measured by concurrence. The interplay of the action of the time-dependent magnetic fields and the spin-coupling mechanism in the occurrence and evolution of quantum correlations is examined in detail.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-06-01 | Results in Physics |