论文标题
对称保护量子状态的衰减
Decay of symmetry-protected quantum states
论文作者
论文摘要
我们研究了三个井的玻色扣链中骨髓多体状态的衰变，其中中央井的玻色子可以逃入水库中。对于消失的粒子相互作用，该系统支持一种无折叠的多体状态，该状态是反对称的玻色子凝结物，其颗粒仅占据边缘井。在经典方法中，该量子状态对应于对称性受保护的非衰减状态，即使在一定强度阈值以下的有限相互作用下也是稳定的。在这里，我们证明，尽管经典的对应物稳定，但由于量子波动而导致的有限原子间相互作用，反对称的玻色子冷凝物始终是可稳定的。
We study the decay of bosonic many-body states in the three well Bose-Hubbard chain where bosons in the central well can escape into a reservoir. For vanishing inter-particle interaction this system supports a non-decaying many-body state which is the antisymmetric Bose-Einstein condensate with particles occupying only the edge wells. In the classical approach this quantum state corresponds to a symmetry protected non-decaying state which is stable even at finite interaction below a certain intensity threshold. Here we demonstrate that despite the classical counterpart is stable the antisymmetric Bose-Einstein condensate is always metastable at finite interatomic interactions due to quantum fluctuations.
