【摘要】 为了给量子系统的几何相位调控提供建议,利用全量子理论研究了一个隧穿双量子点分子与量子化单模场相互作用系统的Berry相位,探讨了量子场平均光子数、场-量子点失谐量、隧穿能级失谐量、隧穿强度以及场-量子点线性和非线性耦合对系统几何相位的影响.数值计算结果表明,在系统本征能级反交差区域附近,可以通过调节外加在量子点分子上的电压方便地对系统的Berry相位实现高效调控,这一结论在实现量子计算方面有潜在应用价值.更多还原

【Abstract】 In order to provide advice on the control of the geometric phase of a quantum system,it explores the Berry phase in a tunneling double-quantum-dot molecule interacting with a quantized single-mode field by the full quantum theory.Effects of parameters,such as the mean photon number of the field,field-dot detuning,tunneling energy-level detuning,linear and nonlinear field-dot coupling,on the geometric phase were researched.The results show that in the region where anticrossing of the eigenenengy levels of the system occurs,the Berry phase can be efficiently controlled by adjusting the applied voltage exerted on the quantum-dot molecule.The conclusion may be applied in quantum computation.更多还原