论文标题
Fröhlich耦合量子位与费米子浴室相互作用
Fröhlich-coupled qubits interacting with fermionic baths
论文作者
论文摘要
我们考虑了一个宏观量子系统，例如Qubit，与FröhlichPolaron模型中的费米斯浴相互作用。因此，在宏观系统变量中，哈密顿的相互作用是线性的，在费米子中是双线性的。使用最近开发的Feynman-Vernon理论扩展到非谐波浴，我们评估了二次的影响和影响力行动中的四分之一术语。我们发现，对于此模型，四分之一的术语通过对称参数消失。尽管浴缸对系统的影响与玻色谐谐波振荡器的形式相同，直到系统浴相互作用的效果到第六阶，但温度依赖性却大不相同，除非考虑了相当人为的模型。
We consider a macroscopic quantum system such as a qubit, interacting with a bath of fermions as in the Fröhlich polaron model. The interaction Hamiltonian is thus linear in the macroscopic system variable, and bilinear in the fermions. Using the recently developed extension of Feynman-Vernon theory to non-harmonic baths we evaluate quadratic and the quartic terms in the influence action. We find that for this model the quartic term vanish by symmetry arguments. Although the influence of the bath on the system is of the same form as from bosonic harmonic oscillators up to effects to sixth order in the system-bath interaction, the temperature dependence is nevertheless rather different, unless rather contrived models are considered.
