The resistance of quantum entanglement to temperature in the Kugel-Khomskii model
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 temperatu...
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| Format: | Article |
| Language: | English |
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SciPost
2023-04-01
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| Series: | SciPost Physics Core |
| Online Access: | https://scipost.org/SciPostPhysCore.6.2.025 |
| _version_ | 1797852505071157248 |
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| author | Valerii E. Valiulin, Andrey V. Mikheyenkov, Nikolay M. Chtchelkatchev, Kliment I. Kugel |
| author_facet | Valerii E. Valiulin, Andrey V. Mikheyenkov, Nikolay M. Chtchelkatchev, Kliment I. Kugel |
| author_sort | Valerii E. Valiulin, Andrey V. Mikheyenkov, Nikolay M. Chtchelkatchev, Kliment I. Kugel |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-09T19:34:21Z |
| format | Article |
| id | doaj.art-4c44f9a2649249268fda6ff920be808e |
| institution | Directory Open Access Journal |
| issn | 2666-9366 |
| language | English |
| last_indexed | 2024-04-09T19:34:21Z |
| publishDate | 2023-04-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics Core |
| spelling | doaj.art-4c44f9a2649249268fda6ff920be808e2023-04-04T14:47:50ZengSciPostSciPost Physics Core2666-93662023-04-016202510.21468/SciPostPhysCore.6.2.025The resistance of quantum entanglement to temperature in the Kugel-Khomskii modelValerii E. Valiulin, Andrey V. Mikheyenkov, Nikolay M. Chtchelkatchev, Kliment I. KugelThe 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.https://scipost.org/SciPostPhysCore.6.2.025 |
| spellingShingle | Valerii E. Valiulin, Andrey V. Mikheyenkov, Nikolay M. Chtchelkatchev, Kliment I. Kugel The resistance of quantum entanglement to temperature in the Kugel-Khomskii model SciPost Physics Core |
| title | The resistance of quantum entanglement to temperature in the Kugel-Khomskii model |
| title_full | The resistance of quantum entanglement to temperature in the Kugel-Khomskii model |
| title_fullStr | The resistance of quantum entanglement to temperature in the Kugel-Khomskii model |
| title_full_unstemmed | The resistance of quantum entanglement to temperature in the Kugel-Khomskii model |
| title_short | The resistance of quantum entanglement to temperature in the Kugel-Khomskii model |
| title_sort | resistance of quantum entanglement to temperature in the kugel khomskii model |
| url | https://scipost.org/SciPostPhysCore.6.2.025 |
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