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Physical Review A

Publisher's Note: Overlaying optical lattices for simulation of complex frustrated antiferromagnets [Phys. Rev. A85, 013632 (2012)]

Zhixin Chen, Han Ma, Mohan Chen, Xiang-Fa Zhou, Lixin He, Guang-Can Guo, Xingxiang Zhou, Yan Chen, Zheng-Wei Zhou

Published Aug 1, 2012• 0 citations
Publisher
DOI
10.1103/physreva.86.029901

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We present design techniques for special optical lattices that allow quantum simulation of spin frustration in two-dimensional systems. By carefully overlaying optical lattices with different periods and orientations we are able to adjust the ratio between the nearest-neighbor and next-nearest-neighbor interaction strengths in a square spin lattice and realize frustration effects. We show that only laser beams of a single frequency are required and the parameter space reachable in our design is broad enough to study the important phases in the J1{J}_{1}J1​-J2{J}_{2}J2​ frustrated Heisenberg model and checkerboard antiferromagnet model. By using the polarization spectroscopy for detection, distinct quantum phases and quantum phase transition points can be characterized straightforwardly. Our design thus offers a suitable setup for simulation of frustrated spin systems.