Vortex lattices in rotating atomic Bose gases with non-local interactions |
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Authors: | NR Cooper EH Rezayi |
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Institution: | a T.C.M. Group, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge, CB3 0HE, United Kingdom b Department of Physics, California State University, Los Angeles, CA 90032, United States c Lucent Technologies, Bell Laboratories, 600 Mountain View Avenue, Murray Hill, NJ 07974, United States |
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Abstract: | We study the groundstates of rotating atomic Bose gases with non-local interactions. We focus on the weak-interaction limit of a model involving s- and d-wave interactions. With increasing d-wave interaction, the mean-field groundstate undergoes a series of transitions between vortex lattices of different symmetries (triangular, square, “stripe” and “bubble” crystal phases). We discuss the stability of these phases to quantum fluctuations. Using exact diagonalization studies, we show that with increasing d-wave interaction, the incompressible Laughlin state at filling factor ν=1/2 is replaced by compressible stripe and bubble states. |
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Keywords: | 03 75 Lm 03 75 Kk 73 43 Cd 73 43 Nq |
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