Spinor physics of magnetically trapped atomic quantum gases

原子量子气体可以被限制在磁阱或光阱中。旋量物理的研究通常使用光学陷阱，例如，最近在原子凝聚物内部自旋混合的量子动力学的积极努力，以及在不同的塞曼态中与铜对费米子原子的BCS到BEC交叉。磁捕获原子被限制在相同的内部状态，绝热地跟随场的局部方向。它们通常不被认为是旋量物理学的潜在候选者，除非多个塞曼态可以几乎相同地被捕获。本研究提出探索磁捕获原子量子气体的旋量物理的一个新方面。一般来说，我们提出由于无散度和无旋度的要求而引起的阱场方向的变化使得有必要将磁捕获原子视为旋量（在任何实验室固定量化轴上观察）。

Atomic quantum gases can be confined in either magnetic or optical traps. The study of spinor physics usually employs optical traps, for example as in active recent efforts of the quantum dynamics for spin mixing inside atomic condensates, and of the BCS to BEC crossover with cooper paired fermionic atoms in distinct Zeeman states. Magnetically trapped atoms are confined in the same internal state that adiabatically follows the local direction of the field. They are not usually considered potential candidates for spinor physics except when more than one Zeeman state can be nearly identically trapped. This study proposes to investigate a new aspect of spinor physics of magnetically trapped atomic quantum gases. Quite generally, we propose that the changing directions of the trap field due to both the requirements of divergence free and curl free make it necessary to consider magnetically trapped atoms as spinors (viewedin any laboratory fixed quantization axis).