论文标题
Bose-Einstein冷凝物阵列中的解锁相关状态状态
Unlocked-relative-phase states in arrays of Bose-Einstein condensates
论文作者
论文摘要
相位工程技术用于控制通过线性耦合Bose-Einstein冷凝物构建的长孔 - 约瑟夫森结阵列的动力学。就在系统的基本离散能带的中间，解锁的相位态与锁定相关的相位Bloch波被证明是固定的。在有限的实验性系统中，这种状态发现动态稳定性的范围取决于耦合与相互作用能的比率。相同的比率决定了不同的衰减状态，其中包括在交界处的约瑟夫森循环电流周围的冷凝水中交错的索尔顿火车的复发。这些瞬态孤子也可以在其固定构型中找到，它们通过深色 - 苏里顿或明亮的苏里顿火车提供条纹密度的状态。此外，证明最大相位外（或splay）状态的制备已演变为振荡冷凝物的均匀密度的振荡，从而使系统的总密度保持恒定，并在低耦合下稳健地抵抗噪声。
Phase engineering techniques are used to control the dynamics of long-bosonic-Josephson-junction arrays built by linearly coupling Bose-Einstein condensates. Just at the middle point of the underlying discrete energy band of the system, unlocked-relative-phase states are shown to be stationary along with the locked-relative-phase Bloch waves. In finite, experimentally-feasible systems, such states find ranges of dynamical stability that depend on the ratio of coupling to interaction energy. The same ratio determines different decay regimes, which include the recurrence of staggered-soliton trains in the condensates around Josephson loop currents at the junctions. These transient solitons are also found in their stationary configurations, which provide striped-density states by means of either dark-soliton or bright-soliton trains. Additionally, the preparation of maximally out-of-phase (or splay) states is demonstrated to evolve into an oscillation of the uniform density of the condensates that keeps constant the total density of the system and robust against noise at low coupling.
