Quantum State Reduction
Quantum State Reduction
复制标题
量子态约简
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
L. Hughston
中科院分区：
文献类型：
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作者：
D. Brody;L. Hughston
我们提出了一个能量驱动的随机主方程的密度矩阵作为量子态约化的动力学模型。相比之下，大多数以前的研究状态约简考虑随机扩展的薛定谔方程，并已引入了密度矩阵的期望随机纯投影算子与发展的状态向量。在计算出约化过程的性质后，我们构造了能量驱动随机主方程的一般解。该解是利用非线性滤波理论得到的，并且是一个完全正的随机映射的形式。
We propose an energy-driven stochastic master equation for the density matrix as a dynamical model for quantum state reduction. In contrast, most previous studies of state reduction have considered stochastic extensions of the Schrodinger equation, and have introduced the density matrix as the expectation of the random pure projection operator associated with the evolving state vector. After working out properties of the reduction process we construct a general solution to the energy-driven stochastic master equation. The solution is obtained by the use of nonlinear filtering theory and takes the form of a completely positive stochastic map.