论文标题
驱动双孔中超电玻色粒合奏的渐近种群失衡
Asymptotic population imbalance of an ultracold bosonic ensemble in a driven double-well
论文作者
论文摘要
我们证明，限制在一维（1D）双井潜力中的超低多体骨气乐团在大时标的两个井之间表现出人口不平衡，当时井的深度受时间依赖性驱动力调节。驱动力的特定形式显示出破坏空间奇偶校验和时间反向对称性，从而导致这种渐近人群失衡（API）。可以通过更改驱动力的相位和颗粒总数来灵活控制API的值。尽管API在几个粒子方面对初始状态高度敏感，但是当我们接近大粒子的经典限制时，对初始状态的这种依赖性被丢失。我们在少数粒子制度中进行了浮点分析，并基于许多粒子制度中驱动的经典非刚性摆的分析。尽管在许多粒子状态中获得的API值与经典限制获得的API值非常吻合，但我们表明，由于量子相关性，相应的实时人群不平衡存在显着分歧。
We demonstrate that an ultracold many-body bosonic ensemble confined in an one-dimensional (1D) double well potential exhibits a population imbalance between the two wells at large timescales, when the depth of the wells are modulated by a time-dependent driving force. The specific form of the driving force is shown to break spatial parity and time-reversal symmetries, which leads to such an asymptotic population imbalance (API). The value of the API can be flexibly controlled by changing the phase of the driving force and the total number of particles. While the API is highly sensitive to the initial state in the few-particle regime, this dependence on the initial state is lost as we approach the classical limit of large particle numbers. We perform a Floquet analysis in the few-particle regime and an analysis based on a driven classical non-rigid pendulum in the many-particle regime. Although the obtained API values in the many-particle regime agree very well with that obtained in the classical limit, we show that there exists a significant disagreement in the corresponding real-time population imbalance due to quantum correlations.
