Entanglement in a two-qubit Heisenberg XXZ chain with different Dzyaloshinskii-Moriya couplings and an inhomogeneous magnetic field
| Autor: | Meng Qin, Yan-Biao Li, Shang-Jin Lin, Wei Liu, Zhong Bai |
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| Rok vydání: | 2010 |
| Předmět: |
Thermal entanglement
Physics Nuclear and High Energy Physics Condensed matter physics Astronomy and Astrophysics Concurrence Quantum Physics Quantum entanglement Magnetic field Chain (algebraic topology) Qubit Quantum mechanics Condensed Matter::Strongly Correlated Electrons Thermal state Ground state Instrumentation |
| Zdroj: | Chinese Physics C. 34:1693-1695 |
| ISSN: | 1674-1137 |
| DOI: | 10.1088/1674-1137/34/11/004 |
| Popis: | Ground state entanglement and thermal entanglement of a two-qubit Heisenberg XXZ chain in the presence of the different Dzyaloshinski-Moriya interaction and inhomogeneous magnetic field are investigated. By the concept of concurrence, we find that the inhomogeneity of the magnetic field may make entanglement last for a long time and the critical temperature is dependent on Jz and b. The entanglement can be increased by increasing the temperature in some cases. We also find that the x-component parameter Dx has a higher critical temperature and more entanglement for a certain condition than the z-component parameter Dz. |
| Databáze: | OpenAIRE |
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