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19 papers · 1 filter
Matrix product ansatz for Fermi fields in one dimension
Sangwoo S. Chung, Kuei Sun, C. J. Bolech
We present an implementation of a continuous matrix product state for two-component fermions in one-dimension. We propose a construction of variational matrices with an efficient p…
Long-time behavior of the momentum distribution during the sudden expansion of a spin-imbalanced Fermi gas in one dimension
C. J. Bolech, F. Heidrich-Meisner, S. Langer +3
We study the sudden expansion of spin-imbalanced ultracold lattice fermions with attractive interactions in one dimension after turning off the longitudinal confining potential. We…
Thermodynamics of the Quantum Critical Point at Finite Doping in the 2D Hubbard Model: A Dynamical Cluster Approximation Study
K. Mikelsons, E. Khatami, D. Galanakis +3
We study the thermodynamics of the two-dimensional Hubbard model within the dynamical cluster approximation. We use continuous time quantum Monte Carlo as a cluster solver to avoid…
The relationship between Hirsch-Fye and weak coupling diagrammatic Quantum Monte Carlo methods
Karlis Mikelsons, Alexandru Macridin, Mark Jarrell
Two weak coupling Continuous Time Quantum Monte Carlo (CTQMC) methods are shown to be equivalent for Hubbard-like interactions. A relation between these CTQMC methods and the Hirsc…
Quantum Critical Point at Finite Doping in the 2D Hubbard Model: A Dynamical Cluster Quantum Monte Carlo Study
N. S. Vidhyadhiraja, A. Macridin, C. Sen +2
We explore the Matsubara quasiparticle fraction and the pseudogap of the two-dimensional Hubbard model with the dynamical cluster quantum Monte Carlo method. The character of the q…
Bond excitations in the pseudogap phase of the Hubbard Model
Alexandru Macridin, Mark Jarrell
Using the dynamical cluster approximation, we calculate the correlation functions associated with the nearest neighbor bond operator which measure the z component of the spin excha…