论文标题
非对称量子狂犬模型的非正交量子状态的扩展
Non-orthogonal qubit states expansion for the asymmetric quantum Rabi model
论文作者
论文摘要
我们提出了不对称量子兔模型（AQRM）基态的身体动机的变分波函数。波函数是与非正交量子态纠缠的挤压相干状态的加权叠加，仅依赖于感兴趣的挤压效果可忽略不计的三个变化参数。几乎所有参数制度，尤其是随着任意偏见，差异扩展在几乎所有参数方面都很好地描述了基态。我们使用变分结果来计算基态的各种相关的物理观察物，并与现有近似值和确切的解决方案进行比较。结果表明，与AQRM的现有近似值相比，变分扩展是一个显着改善。
We present a physically motivated variational wave function for the ground state of the asymmetric quantum Rabi model (AQRM). The wave function is a weighted superposition of squeezed coherent states entangled with non-orthogonal qubit states, and relies only on three variational parameters in the regimes of interest where the squeezing effect becomes negligible. The variational expansion describes the ground state remarkably well in almost all parameter regimes, especially with arbitrary bias. We use the variational result to calculate various relevant physical observables of the ground state, and make a comparison with existing approximations and the exact solution. The results show that the variational expansion is a significant improvement over the existing approximations for the AQRM.
