一维量子Sine-Gordon模型隧道效应的理论研究

Theoretical Study of Tunneling Effect in One-dimensional Quantum Sine-Gordon Model

用高斯波泛涵变分理论研究了一维量子Sine -Gordon模型的隧道效应 ,发现系统长度为有限时 ,隧道效应改变系统的低温性质 ,系统长度为无限时 ,隧道效应不改变系统的低温性质 .

The tunneling effect in one-dimensional quantum Sine-Gordon model is studied by variational Gaussian wave functional method. It is shown that the tunneling effect will disappear when one-dimensional Sine-Gordon model's length tends towards infinity. The tunneling effect only plays its role in one-dimensional quantum Sine-Gordon system with finite length.