Quantum Langevin theory for two coupled phase-conjugated electromagnetic waves
Quantum Langevin theory for two coupled phase-conjugated electromagnetic waves
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两个耦合相位共轭电磁波的量子朗之万理论
DOI：
10.1103/physreva.107.053703
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发表时间：
2023
影响因子：
2.9
通讯作者：
Du, Shengwang
中科院分区：
文献类型：
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作者：
Jiang, Yue;Mei, Yefeng;Du, Shengwang
给出了具有线性损耗（增益）和复非线性耦合系数的两个耦合相位共轭电磁场的量子朗之万方程的宏观唯象公式。从耦合矩阵中得到宏观唯象公式，以保持场的对易关系和关联，而不需要知道光-物质相互作用的微观细节和内部原子结构.为了验证这个唯象公式，我们以双四能级原子系统中的自发四波混频为例，数值验证了我们的宏观唯象结果与微观Heisenberg-Langevin理论的结果是一致的.我们发现，一个复值的非线性耦合系数可以导致噪声，即使没有线性增益或损失。最后，我们应用量子Langevin方程研究了纠缠光子对（双光子）产生过程中的线性增益和损耗、复相位失配以及复非线性耦合系数对时间量子关联的影响。
We provide a general macroscopic phenomenological formula of quantum Langevin equations for two coupled phase-conjugated electromagnetic fields with linear loss (gain) and complex nonlinear coupling coefficient. The macroscopic phenomenological formula is obtained from the coupling matrix to preserve the field commutation relations and correlations, which does not require knowing the microscopic details of light-matter interaction and internal atomic structures. To validate this phenomenological formula, we take spontaneous four-wave mixing in a double-four-level atomic system as an example to numerically confirm that our macroscopic phenomenological result is consistent with that obtained from the microscopic Heisenberg-Langevin theory. We find that a complex-valued nonlinear coupling coefficient can lead to noises even without linear gain or loss. Finally, we apply the quantum Langevin equations to study the effects of linear gain and loss, complex phase mismatching, as well as complex nonlinear coupling coefficient in entangled photon pair (biphoton) generation, particularly to their temporal quantum correlations.
DOI：
--
发表时间：
2006
期刊：
--
影响因子：
--
作者：
Iroon Polytechniou-
通讯作者：
Iroon Polytechniou-
量子态中低于阈值的光参量振荡器的光谱特性的非线性功率依赖性
影响因子：
3.3
作者：
G. Shafiee;D. Strekalov;A. Otterpohl;F. Sedlmeir;G. Schunk;U. Vogl;H. Schwefel;G. Leuchs;C. Marquardt
通讯作者：
C. Marquardt
冷原子中具有可调阈值的无镜光学参量振荡。
影响因子：
8.6
作者：
Yefeng Mei;Xianxin Guo;Luwei Zhao;Shengwang Du
通讯作者：
Shengwang Du