双组分玻色气体中的自旋-电荷分离
Spin-charge separation in two-component Bose-gases
摘要：
我们发现，相互作用的一维电子量子系统的关键特征之一，自旋和电荷的分离，可以观察到在两个组件系统的玻色子超冷原子，甚至接近竞争相分离制度。为此，我们使用密度矩阵重整化群技术确定了单粒子激发和单粒子谱函数的实时演化。由于有效的玻色子冷却和良好的可调谐性，这种设置显示出非常好的条件，观察这种强相关效应。在预期的实验实现，我们计算的速度自旋和电荷扰动的参数范围很广。
英文摘要：
We show that one of the key characteristics of interacting one-dimensional electronic quantum systems, the separation of spin and charge, can be observed in a two-component system of bosonic ultracold atoms even close to a competing phase separation regime. To this purpose we determine the real-time evolution of a single particle excitation and the single-particle spectral function using density-matrix renormalization group techniques. Due to efficient bosonic cooling and good tunability this setup exhibits very good conditions for observing this strong correlation effect. In anticipation of experimental realizations we calculate the velocities for spin and charge perturbations for a wide range of parameters.
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