6533b7dafe1ef96bd126e1ab

RESEARCH PRODUCT

Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems

Iulia GhiuAurelian IsarRoberto GrimaudoTatiana MihaescuAntonino Messina

subject

quantum discordQuantum correlationQuantum dynamicsFOS: Physical sciencesGeneral Physics and Astronomylcsh:AstrophysicsQuantum entanglement01 natural sciencesArticle010305 fluids & plasmasQuantum mechanicslcsh:QB460-4660103 physical sciencesWerner statelcsh:Science010306 general physicsPhysicsQuantum discordQuantum PhysicsWerner stateTime evolutionConcurrenceQuantum Physicslcsh:QC1-999Qubitlcsh:Qsudden death of entanglementQuantum Physics (quant-ph)lcsh:Physics

description

We study and compare the time evolutions of concurrence and quantum discord in a driven system of two interacting qubits prepared in a generic Werner state. The corresponding quantum dynamics is exactly treated and manifests the appearance and disappearance of entanglement. Our analytical treatment transparently unveils the physical reasons for the occurrence of such a phenomenon, relating it to the dynamical invariance of the X structure of the initial state. The quantum correlations which asymptotically emerge in the system are investigated in detail in terms of the time evolution of the fidelity of the initial Werner state.

yearjournalcountryeditionlanguage
2020-10-08
10.3390/e22070785http://arxiv.org/abs/2010.03968