论文标题
评论“原子Bose-Einstein中的量子晶体和相互作用的量规理论”
Comment on "Quantum Time Crystals and Interacting Gauge Theories in Atomic Bose-Einstein Condensates"
论文作者
论文摘要
在最近的一封信中[物理学。莱特牧师。 123，250402]，Öhberg和Wright描述了在存在密度依赖量规势存在下被困在环上的玻色网凝结物。据称，系统的基态对应于旋转的手性明亮孤子，因此形成了真实的时间晶体，通过执行周期性运动来最大程度地减少其能量。我们表明，在字母中未正确计算实验室框架中手性孤子的能量。如果孤子不移动，则正确的能量将最小。
In a recent letter [Phys. Rev. Lett. 123, 250402], Öhberg and Wright describe a Bose-Einstein condensate trapped on a ring in the presence of the density-dependent gauge potential. It is claimed that the ground state of the system corresponds to a rotating chiral bright soliton and consequently it forms a genuine time crystal which minimizes its energy by performing periodic motion. We show that the energy of the chiral soliton in the laboratory frame is not correctly calculated in the letter. The correct energy becomes minimal if the soliton does not move.
