The Quantum Trajectory Approach to Problems in Quantum Optics

提出了一种利用量子轨迹方法研究开放量子系统向环境发射光子的新方法。这些轨迹集合的平均值再现了传统量子力学的结果。该方法的优点是可以模拟实时信号，为量子测量问题提供了新的思路。轨迹方法的另一个优点是它是一种基于波函数的方法，避免了传统密度矩阵技术的问题。该方法将应用于空腔量子电动力学和原子与非经典光的相互作用问题。最终的希望是光学量子测量的自洽理论。

A new approach to the physics of open quantum systems emitting photons to the environment is developed using a quantum trajectories method. The averages from this ensemble of trajectories reproduce the results of conventional quantum mechanics. The approach has the advantage that it can simulate real time signals and throws new light on the problems of quantum measurement. Another strength of the trajectory approach is that it is a wavefunction based method, which avoids the problems of the more traditional density matrix techniques. The method will be applied to problems in cavity quantum electrodynamics and the interaction of atoms with nonclassical light. The ultimate hope is a self- consistent theory of quantum measurements in optics.