TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.6.2.025
TI  - The resistance of quantum entanglement to temperature in the Kugel-Khomskii model
PY  - 2023/04/04
UR  - https://scipost.org/SciPostPhysCore.6.2.025
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 6
IS  - 2
SP  - 025
A1  - Valiulin, Valerii E.
AU  - Mikheyenkov, Andrey V.
AU  - Chtchelkatchev, Nikolai M.
AU  - Kugel, Kliment I.
AB  - The Kugel-Khomskii model with entangled spin and orbital degrees of freedom is a good testing ground for many important features in quantum information processing, such as robust gaps in the entanglement spectra. Here, we demonstrate that the entanglement can be also robust under effect of temperature within a wide range of parameters. It is shown, in particular, that the temperature dependence of entanglement often exhibits a nonmonotonic behavior. Namely, there turn out to be ranges of the model parameters, where entanglement is absent at zero temperature, but then, with an increase in temperature, it appears, passes through a maximum, and again vanishes.
ER  -

@Article{10.21468/SciPostPhysCore.6.2.025,
	title={{The resistance of quantum entanglement to temperature in the Kugel-Khomskii model}},
	author={Valerii E. Valiulin and Andrey V. Mikheyenkov and Nikolay M. Chtchelkatchev and Kliment I. Kugel},
	journal={SciPost Phys. Core},
	volume={6},
	pages={025},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.6.2.025},
	url={https://scipost.org/10.21468/SciPostPhysCore.6.2.025},
}