快速旋转少费米子系统的Skyrmion基态
Skyrmion Ground States of Rapidly Rotating Few-Fermion Systems
摘要：
我们表明，超冷费米子在人工磁场中打开了一个新的窗口，自旋分数量子霍尔效应的物理。本文数值研究了快速旋转光学微阱中强相互作用少费米子系统的最低能态。我们发现，skyrmion般的基态局部铁磁，长程自旋纹理出现。为了在实验上实现这种状态，可以使用具有高阶角动量分量的旋转微阱来制备最低朗道能级的费米子粒子。我们发现在目前的实验中，Skyrmion样的基态应该是可访问的参数制度，并证明了在快速旋转的谐波陷阱中制备它们的绝热途径。长程相互作用的增加将导致自旋纹理和分数量子霍尔物理之间更丰富的相互作用。
英文摘要：
We show that ultracold fermions in an artificial magnetic field open up a new window to the physics of the spinful fractional quantum Hall effect. We numerically study the lowest energy states of strongly interacting few-fermion systems in rapidly rotating optical microtraps. We find that skyrmion-like ground states with locally ferromagnetic, long-range spin textures emerge. To realize such states experimentally, rotating microtraps with higher-order angular momentum components may be used to prepare fermionic particles in a lowest Landau level. We find parameter regimes in which skyrmion-like ground states should be accessible in current experiments and demonstrate an adiabatic pathway for their preparation in a rapidly rotating harmonic trap. The addition of long range interactions will lead to an even richer interplay between spin textures and fractional quantum Hall physics.
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