CAJ | 학술논문

研究强度相关耦合双Jaynes-Cummings模型中,两运动原子初始处于最大纠缠态、光场初始处于单模热态时,强度相关耦合、热光场平均光子数以及原子运动对两原子的纠缠和量子失谐的影响.结果表明:考虑强度相关耦合时,纠缠和量子失谐均出现周期性地消失和回复现象,并且,回复以后的纠缠和量子失谐能达到初始值.腔场温度的升高会加速纠缠和量子失谐的消失.此外,原子运动的场模结构参数对该模型中的纠缠和量子失谐影响很大,其值选择合适时,两个原子能够自始至终地保持纠缠或量子失谐状态.
연구강도상관우합쌍Jaynes-Cummings모형중,량운동원자초시처우최대규전태、광장초시처우단모열태시,강도상관우합、열광장평균광자수이급원자운동대량원자적규전화양자실해적영향.결과표명:고필강도상관우합시,규전화양자실해균출현주기성지소실화회복현상,병차,회복이후적규전화양자실해능체도초시치.강장온도적승고회가속규전화양자실해적소실.차외,원자운동적장모결구삼수대해모형중적규전화양자실해영향흔대,기치선택합괄시,량개원자능구자시지종지보지규전혹양자실해상태.
Considering a double J-C model with intensity-dependent coupling, we have studied the effects of the intensity-dependent cou-pling, the mean photon numbers and the atomic motion, on the entanglement and quantum discord between the two two-level atoms when the moving atoms are initially in a maximally entangled state and the fields are in the single-mode thermal fields. The results show that, the entanglement and quantum discord disappear and revive periodically, and can have up to their starting values after re-vival. A rise in cavity temperature accelerates the death of the entanglement and quantum discord. In addition, the field-mode structural parameter has a strong effect on the entanglement and quantum discord in the system. When the field-mode structural parameter takes a suitable value, the entanglement and quantum discord of the two atoms can be kept from start to finish.