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arXiv 1010.4545cond-mat.quant-gas
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一维玻色气体中自旋运动和相互作用的控制

Controlling spin motion and interactions in a one-dimensional Bose gas

P. Wicke, S. Whitlock, N. J. van Druten

摘要:

超冷气体实验为探索量子多体物理提供了无与伦比的机会,对温度,密度,相互作用甚至维度等关键参数进行了出色的控制。在某些系统中,原子间的相互作用可以通过磁费什巴赫共振来调节,这在实现新的多体现象中发挥了至关重要的作用。然而,合适的费什巴赫共振并不总是可用的,并且它们提供有限的自由度,因为磁场强度是唯一的控制参数。在这里,我们展示了一种新的方式来调整在一维量子气体中的相互作用,使用状态依赖的修饰势,使控制非平衡自旋运动的双组分气体的87 Rb。可达到的范围包括自旋独立相互作用的点,其中精确的量子多体解是可用的,以及自旋运动被冻结的点。这种多功能性为自旋波、自旋-“电荷”分离以及低维量子气体中超流性和磁性之间的关系的实验开辟了一条新的途径。

英文摘要:

Experiments on ultracold gases offer unparalleled opportunities to explore quantum many-body physics, with excellent control over key parameters including temperature, density, interactions and even dimensionality. In some systems, atomic interactions can be adjusted by means of magnetic Feshbach resonances, which have played a crucial role in realizing new many-body phenomena. However, suitable Feshbach resonances are not always available, and they offer limited freedom since the magnetic field strength is the only control parameter. Here we show a new way to tune interactions in one-dimensional quantum gases using state-dependent dressed potentials, enabling control over non-equilibrium spin motion in a two-component gas of 87Rb. The accessible range includes the point of spin-independent interactions where exact quantum many-body solutions are available and the point where spin motion is frozen. This versatility opens a new route to experiments on spin waves, spin-"charge" separation and the relation between superfluidity and magnetism in low-dimensional quantum gases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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