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arXiv · 1806.07434

Griffiths Physics in an Ultracold Bose Gas

M. E. W. Reed·Z. S. Smith·Aftaab Dewan·S. L. Rolston
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Abstract

Coupled XY model systems consisting of three-dimensional (3D) systems with disordered interlayer physics are of significant theoretical interest. We realize a set of coupled quasi-2D layers of $^{87}$Rb in the presence of disordered inter-layer coupling. This is achieved with our high bandwidth arbitrary optical lattice to obviate restrictions on the dimensionality of disorder with speckle-generated optical fields. We identify phase crossover regions compatible with the existence of a pair of intermediate Griffiths phases between a thermal state and the emergence of bulk 3D superfluidity.

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M. E. W. Reed, Z. S. Smith, Aftaab Dewan, S. L. Rolston. 2018-06-19. Griffiths Physics in an Ultracold Bose Gas. https://doi.org/10.1103/physreva.99.063611

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