论文标题
一维隧道的偏态动力学的反应式态度的动力学
Dephasing-rephasing dynamics of one-dimensional tunneling quasicondensates
论文作者
论文摘要
我们研究了由碱金属原子制成的两种一维准定态的量子隧穿，考虑了两种不同的隧道构型：并排和从头到尾。得出准粒子激发光谱后，我们讨论了独立子系统突然耦合后相对相的动力学。特别是，我们计算系统的相干因子，由于非零隧道振幅，它表现出振荡而不是纯dephasing。这些振荡通过较高的隧穿能量和较高的系统密度增强。我们的预测为将来的实验提供了一个基准，以低于$ t \ lyssim 5 \，\ mbox {nk} $。
We study the quantum tunneling of two one-dimensional quasi-condensates made of alkali-metal atoms, considering two different tunneling configurations: side-by-side and head-to-tail. After deriving the quasiparticle excitation spectrum, we discuss the dynamics of the relative phase following a sudden coupling of the independent subsystems. In particular, we calculate the coherence factor of the system, which, due to the nonzero tunneling amplitude, it exhibits dephasing-rephasing oscillations instead of pure dephasing. These oscillations are enhanced by a higher tunneling energy, and by higher system densities. Our predictions provide a benchmark for future experiments at temperatures below $T \lesssim 5 \, \mbox{nK}$.
