Quantum Monte Carlo simulations of antiferromagnetism in ultracold fermions on optical lattices within real-space dynamical mean-field theory
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Publication:549017
DOI10.1016/J.CPC.2010.07.011zbMATH Open1219.82206arXiv1006.2716OpenAlexW2005492573MaRDI QIDQ549017
Author name not available (Why is that?)
Publication date: 5 July 2011
Published in: (Search for Journal in Brave)
Abstract: We present a massively parallel quantum Monte Carlo based implementation of real-space dynamical mean-field theory for general inhomogeneous correlated fermionic lattice systems. As a first application, we study magnetic order in a binary mixture of repulsively interacting fermionic atoms harmonically trapped in an optical lattice. We explore temperature effects and establish signatures of the N'{e}el transition in observables directly accessible in cold-atom experiments; entropy estimates are also provided. We demonstrate that the local density approximation (LDA) fails for ordered phases. In contrast, a "slab" approximation allows us to reach experimental system sizes with O(10^5) atoms without significant loss of accuracy.
Full work available at URL: https://arxiv.org/abs/1006.2716
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