CAJ | 학술논문

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。
고필비상호작용적량양자비특계통각자여독립적1/f열고상호작용，채용양자부치도작위양자관련도량，연구료량양자비특간적양자관련동역학。연구표명，양자부치도재모사초시패이대각태하회출현돌연약천심지쌍중돌연약천적현상。당열고적온도증가，회가속돌연약천적진정。인차，고필통과동역학해우맥충래연완돌연약천심지유지은정적양자관련。
Noninteracting tw o‐qubit system coupled to independent 1/f heat 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 .