原子与分子物理学报
原子與分子物理學報
원자여분자물이학보
CHINESE JOURNAL OF ATOMIC AND MOLECULAR PHYSICS
2014年
6期
959-963
,共5页
量子纠缠%双Jaynes-Cummings模型%线性调制
量子糾纏%雙Jaynes-Cummings模型%線性調製
양자규전%쌍Jaynes-Cummings모형%선성조제
Quantum entanglement%Double Jaynes-Cummings model%Linear modulation
考虑原子－光场耦合系数随时间变化的双Jaynes－Cummings模型组成的系统，研究两原子初始处于最大纠缠态时，耦合系数的线性调制对原子纠缠的影响。结果表明：初始纠缠保持时间的长短与耦合系数的线性调制密切相关。无论是单光子过程还是双光子过程，较耦合系数为常数的情形而言，耦合系数线性调制下的初始纠缠消失的时间被大大延迟，延迟时间的长短与耦合系数线性调制的参数选择密切相关，并且在双光子过程中延迟的时间更长。
攷慮原子－光場耦閤繫數隨時間變化的雙Jaynes－Cummings模型組成的繫統，研究兩原子初始處于最大糾纏態時，耦閤繫數的線性調製對原子糾纏的影響。結果錶明：初始糾纏保持時間的長短與耦閤繫數的線性調製密切相關。無論是單光子過程還是雙光子過程，較耦閤繫數為常數的情形而言，耦閤繫數線性調製下的初始糾纏消失的時間被大大延遲，延遲時間的長短與耦閤繫數線性調製的參數選擇密切相關，併且在雙光子過程中延遲的時間更長。
고필원자－광장우합계수수시간변화적쌍Jaynes－Cummings모형조성적계통，연구량원자초시처우최대규전태시，우합계수적선성조제대원자규전적영향。결과표명：초시규전보지시간적장단여우합계수적선성조제밀절상관。무론시단광자과정환시쌍광자과정，교우합계수위상수적정형이언，우합계수선성조제하적초시규전소실적시간피대대연지，연지시간적장단여우합계수선성조제적삼수선택밀절상관，병차재쌍광자과정중연지적시간경장。
Considering a double Jaynes-Cummings model with the time-dependent atom-field couplings, we have studied the effects of the linear modulation of the atom-field couplings on entanglement between two atoms when the two atoms are initially in an entangled state.The results show that the entanglement is very sensitive to the linear modulation of the atom-field coupling.Both for one-photon processes and for two-photon proces-ses, the disappearance of the initial entanglement is delayed due to the linear modulation as compared to the double standard Jaynes-Cummings model.The delayed time is longer for two-photon processes than that for one-photon processes, and long or short depending on the value of the parameters in the modulation function.
