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4 papers · 2 filters
Many-body computations by stochastic sampling in Hartree-Fock-Bogoliubov space
Hao Shi, Shiwei Zhang
We describe the computational ingredients for an approach to treat interacting fermion systems in the presence of pairing fields, based on path-integrals in the space of Hartree-Fo…
The insulating phases of vanadium dioxide are Mott-Hubbard insulators
T. J. Huffman, C. Hendriks, E. J. Walter +6
We present the first comprehensive broadband optical spectroscopy data on two insulating phases of vanadium dioxide (VO2): monoclinic M2 and triclinic. The main result of our work…
Cluster size convergence of the density matrix embedding theory and its dynamical cluster formulation: a study with an auxiliary-field quantum Monte Carlo solver
Bo-Xiao Zheng, Joshua S. Kretchmer, Hao Shi +2
We investigate the cluster size convergence of the energy and observables using two forms of density matrix embedding theory (DMET): the original cluster form (CDMET) and a new for…
Coupling quantum Monte Carlo and independent-particle calculations: self-consistent constraint for the sign problem based on density or density matrix
Mingpu Qin, Hao Shi, Shiwei Zhang
Quantum Monte Carlo (QMC) methods are one of the most important tools for studying interacting quantum many-body systems. The vast majority of QMC calculations in interacting fermi…