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arXiv 0705.3568quant-ph
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非均匀外磁场作用下非线性耦合二夸克系统的热纠缠

Thermal entanglement in a two-qutrit system with nonlinear coupling under nonuniform external magnetic field

Iman Sargolzahi, Sayyed Yahya Mirafzali, Mohsen Sarbishaei

摘要:

研究了非均匀磁场作用下具有非线性耦合的2-qutrit自旋链的热纠缠。任意(有限维)m体系统的热纠缠在某个有限阈值温度T_s处消失。研究了该二组元系统的T_s随系统参数(非线性耦合和磁场)的变化规律。此外,我们还比较了该系统的I-并发性的两个下界,并研究了其密集编码容量随系统参数的变化。

英文摘要:

We study the thermal entanglement of a 2-qutrit spin chain with nonlinear coupling in the presence of nonuniform magnetic field. Thermal entanglement of an arbitrary (finite dimensional) m-partite system vanishes at some finite threshold temperature T_s. We investigate the dependence of T_s on the system's parameters, i.e. the nonlinear coupling and the magnetic field, for this 2-qutrit system. In addition, we compare two lower bounds of I-concurrence for this system and also study its dense coding capacity as a function of system's parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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