Geometric Discord of Non-X-Structured State under Decoherence Channels
| Autor: | Yu-Qi Fu, Hang Chen, Jian-Xing Fang |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Physics
Quantum discord Quantum decoherence Physics and Astronomy (miscellaneous) Quantitative Biology::Tissues and Organs General Mathematics Quantum mechanics Phase (waves) Quantitative Biology::Populations and Evolution State (functional analysis) Constant (mathematics) Quantitative Biology::Genomics Physics::Geophysics |
| Zdroj: | International Journal of Theoretical Physics. 53:2967-2979 |
| ISSN: | 1572-9575 0020-7748 |
| DOI: | 10.1007/s10773-014-2094-9 |
| Popis: | We investigate the level surfaces of geometric discord under some typical kinds of decoherence channels for a class of two-qubit states with the Bloch vectors $\overset {\rightharpoonup }{r}$ and $\overset {\rightharpoonup }{s}$ in z and x direction respectively. The surfaces of geometric discord are composed of three interaction ”cylinders” along three orthogonal directions of $\overset {\rightharpoonup }{c}_{1}$ , $\overset {\rightharpoonup }{c}_{2}$ and $\overset {\rightharpoonup }{c}_{3}$ . We study the different images corresponding to different values of geometric discord, the Bloch vectors as well as p. In the phase damping channel, the geometric discord keeps constant over a period of time, furthermore the geometric discord and the quantum discord have the same sudden change point for Non-X-structured state. |
| Databáze: | OpenAIRE |
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