Thermal quantum discord and classical correlations in a two-qubit Ising model under a site-dependent magnetic field

Terzis, Andreas; Androvitsaneas, Petros; Paspalakis, Emmanuel

doi:10.1007/s11128-011-0345-8

Cited by 4 publications

(2 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[16] Quantum discord has shown its advantage in quantum information processing and quantum computation, thus an enormous amount of effort has been devoted to studying the quantum discord. [20][21][22][23][24][25][26][27][28][29] For practical significance, many researches have focused on the behaviors of quantum correlations at finite temperature. Thermal entanglement (TE) and thermal quantum discord (TQD) are two use-ful tools in characterizing quantum correlations of the system at finite temperature.…”

Section: Introductionmentioning

confidence: 99%

Thermal quantum correlations of a spin-1/2 Ising–Heisenberg diamond chain with Dzyaloshinskii–Moriya interaction

2018

View full text Add to dashboard Cite

We investigate the properties of thermal quantum correlations in an infinite spin-1/2 Ising-Heisenberg diamond chain with Dzyaloshinskii-Moriya (DM) interaction. The thermal quantum discord (TQD) and the thermal entanglement (TE) are discussed as two kinds of important methods to measure the quantum correlation, respectively. It is found that DM interaction plays an important role in the thermal quantum correlations of the system. It can enhance the thermal quantum correlations by increasing DM interaction. Furthermore, the thermal quantum correlations can be promoted by tuning the external magnetic field and the Heisenberg coupling parameter in the antiferromagnetic system. It is shown that the behaviors of TQD differ from those of TE. TQD is more robust against decoherence than TE. For the measurement of TQD, the "regrowth" phenomenon occurs in the ferromagnetic system. We also find that the anisotropy favors the thermal quantum correlations of the system with weak DM interaction.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermal quantum correlations of a spin-1/2 Ising–Heisenberg diamond chain with Dzyaloshinskii–Moriya interaction

2018

View full text Add to dashboard Cite

show abstract

“…In particular, quantum discord which historically is the first introduced measure for the nonclassicality based on the Openheim-Horodecki paradigm, has attracted much attention in recent years [13][14][15][16][17]. It is based on the difference between two quantum extensions of classically equivalent concepts namely the mutual information.…”

Section: Introductionmentioning

confidence: 99%

Quantum correlation evolution of GHZ and $$W$$ W states under noisy channels using ameliorated measurement-induced disturbance

Espoukeh

Pedram

2014

Quantum Inf Process

View full text Add to dashboard Cite

We study quantum correlation of Greenberger-Horne-Zeilinger (GHZ) and W states under various noisy channels using measurement-induced disturbance approach and its optimized version.Although these inequivalent maximal entangled states represent the same quantum correlation in the absence of noise, it is shown that the W state is more robust than the GHZ state through most noisy channels. Also, using measurement-induced disturbance measure, we obtain the analytical relations for the time evolution of quantum correlations in terms of the noisy parameter κ and remove its overestimating quantum correlations upon implementing the ameliorated measurement-induced disturbance.

show abstract

Relations between quantum correlations, purity and teleportation fidelity for the two-qubit Heisenberg XYZ system

Qin

2014

Quantum Inf Process

View full text Add to dashboard Cite

Thermal quantum discord and classical correlations in a two-qubit Ising model under a site-dependent magnetic field

Cited by 4 publications

References 41 publications

Thermal quantum correlations of a spin-1/2 Ising–Heisenberg diamond chain with Dzyaloshinskii–Moriya interaction

Thermal quantum correlations of a spin-1/2 Ising–Heisenberg diamond chain with Dzyaloshinskii–Moriya interaction

Quantum correlation evolution of GHZ and $$W$$ W states under noisy channels using ameliorated measurement-induced disturbance

Relations between quantum correlations, purity and teleportation fidelity for the two-qubit Heisenberg XYZ system

Contact Info

Product

Resources

About