标题： 量子力学简单现象与费曼实时路径积分 显示英文标题

标题： Simple Quantum Mechanical Phenomena and the Feynman Real Time Path Integral

摘要： 路径积分形式给出了量子力学非常直观且易于理解的方法，但由于相位的复杂求和，人们通常更喜欢薛定谔的方法。 我们将展示通过费曼的全路径实时求和，可以计算简单的量子现象。 一旦得到传播子，获得能量谱或任意波函数的演化就变得特别容易。 显示英文摘要

摘要： The path integral formalism gives a very illustrative and intuitive understanding of quantum mechanics but due to its difficult sum over phases one usually prefers Schr\"odinger's approach. We will show that it is possible to calculate simple quantum phenomena by performing Feynman's sum over all paths staying entirely in real time. Once the propagator is obtained it is particularly easy to get the energy spectrum or the evolution of any wavefunction.