Zobrazeno 1 - 10
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pro vyhledávání: '"Gorelik, E."'
Autor:
Gorelik, E. V., Blümer, N.
Localized defects, unavoidable in real solids, may be simulated in (generically defect-free) cold-atom systems, e.g., via modifications of the optical lattice. We study the Hubbard model on a square lattice with single impurities, pairs of nearby imp
Externí odkaz:
http://arxiv.org/abs/1405.0404
Autor:
Blümer, N., Gorelik, E.
Publikováno v:
Phys. Rev. B 87, 085115 (2013)
The Hubbard model with large orbital degeneracy has recently gained relevance in the context of ultracold earth alkali like atoms. We compute its static properties in the SU(2M) symmetric limit for up to M=8 bands at half filling within dynamical mea
Externí odkaz:
http://arxiv.org/abs/1212.4485
Publikováno v:
Phys. Rev. B 86, 155109 (2012)
We compute unbiased spectral functions of the two-dimensional Hubbard model by extrapolating Green functions, obtained from determinantal quantum Monte Carlo simulations, to the thermodynamic and continuous time limits. Our results clearly resolve th
Externí odkaz:
http://arxiv.org/abs/1205.6788
Universal probes for antiferromagnetic correlations and entropy in cold fermions on optical lattices
Publikováno v:
Phys. Rev. A 85, 061602(R) (2012)
We determine antiferromagnetic (AF) signatures in the half-filled Hubbard model at strong coupling on a cubic lattice and in lower dimensions. Upon cooling, the transition from the charge-excitation regime to the AF Heisenberg regime is signaled by a
Externí odkaz:
http://arxiv.org/abs/1201.5576
We verify signatures of antiferromagnetic (AF) correlations in the double occupancy D [Gorelik et al., PRL 105, 065301 (2010)] and study their dimensional dependence using direct quantum Monte Carlo in dimensions d=2,3 and Bethe Ansatz in d=1. We fin
Externí odkaz:
http://arxiv.org/abs/1105.3356
Autor:
Blümer, N., Gorelik, E. V.
Publikováno v:
Computer Physics Communications 118, 115 (2011)
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
Externí odkaz:
http://arxiv.org/abs/1006.2716
Publikováno v:
Phys. Rev. Lett. 105, 065301 (2010) [4 pages]
We study the magnetic ordering transition for a system of harmonically trapped ultracold fermions with repulsive interactions in a cubic optical lattice, within a real-space extension of dynamical mean-field theory (DMFT). Using a quantum Monte Carlo
Externí odkaz:
http://arxiv.org/abs/1004.4857
Autor:
Gorelik, E. V., Blümer, N.
Publikováno v:
Phys. Rev. A 80, 051602(R) (2009)
Ternary flavor mixtures of ultracold fermionic atoms in an optical lattice are studied in the case of equal, repulsive on-site interactions U>0. The corresponding SU(3) invariant Hubbard model is solved numerically exactly within dynamical mean-field
Externí odkaz:
http://arxiv.org/abs/0904.4610
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