arXivDaily arXiv每日学术速递 周一至周五更新
arXiv quant-ph/0605022quant-ph
收藏

量子芝诺和反芝诺效应的量子轨道方法

Quantum Trajectory method for the Quantum Zeno and anti-Zeno effects

J. Ruseckas, B. Kaulakys

摘要:

我们对二能级系统和衰减系统的量子芝诺和反芝诺效应进行了随机模拟。而不是简单的投影假设的方法,一个更现实的模型与环境的相互作用的检测器使用。使用量子轨道方法考虑了环境的影响。对单个系统的测量的模拟显示了波包崩溃的概率行为。当用量子轨道方法分析大系综时,结果与用密度矩阵方法得到的结果相同。数值计算的结果与测量系统衰减率的解析表达式进行了比较,发现两者吻合很好,由于解析表达式只依赖于测量持续时间,与数值计算的吻合表明模型的其它参数并不重要。

英文摘要:

We perform stochastic simulations of the quantum Zeno and anti-Zeno effects for two level system and for the decaying one. Instead of simple projection postulate approach, a more realistic model of a detector interacting with the environment is used. The influence of the environment is taken into account using the quantum trajectory method. The simulation of the measurement for a single system exhibits the probabilistic behavior showing the collapse of the wave-packet. When a large ensemble is analysed using the quantum trajectory method, the results are the same as those produced using the density matrix method. The results of numerical calculations are compared with the analytical expressions for the decay rate of the measured system and a good agreement is found. Since the analytical expressions depend on the duration of the measurement only, the agreement with the numerical calculations shows that otherparameters of the model are not important.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑