【摘要】 考虑非相互作用的两量子比特系统各自与独立的1/f热库相互作用,采用量子负值度作为量子关联度量,研究了两量子比特间的量子关联动力学。研究表明,量子负值度在某些初始贝尔对角态下会出现突然跃迁甚至双重突然跃迁的现象。当热库的温度增加,会加速突然跃迁的进程。因此,考虑通过动力学解耦脉冲来延缓突然跃迁甚至维持稳定的量子关联。更多还原

【Abstract】 Noninteracting two-qubit system coupled to independent 1/fheat reservoirs are considered and the negativity of quantumness is used to investigate the dynamics of quantum correlation for the two-qubit system.The phenomenon of sudden transition or even double sudden transition exists for the negativity of quantumness when the two-qubit system is initially prepared in certain Bell diagonal state and the transition process is accelerated by increasing the temperature of the reservoir.The dynamical decoupling pulses are used to delay the sudden transition or even maintain stationary quantum correlation.更多还原