The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform
Hrvoje Buljan - One of the best experts on this subject based on the ideXlab platform.
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exact solutions of a model for synthetic anyons in a Noninteracting System
Physical Review B, 2020Co-Authors: Frane Lunic, Marija Todoric, Bruno Klajn, Tena Dubcek, Dario Jukic, Hrvoje BuljanAbstract:We study a theoretical model for synthetic anyons in a Noninteracting quantum many-body System. Synthetic anyons can occur in a Noninteracting System
Lei Wang - One of the best experts on this subject based on the ideXlab platform.
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Topological phase transition in the Hofstadter-Hubbard model
Bulletin of the American Physical Society, 2015Co-Authors: Hsiang-hsuan Hung, Lei Wang, Matthias TroyerAbstract:We study the interplay between topological and conventional long range order of attractive fermions in a time reversal symmetric Hofstadter lattice using quantum Monte Carlo simulations, focussing on the case of one-third flux quantum per plaquette. At half-filling, the System is unstable towards s-wave pairing and charge-density-wave order at infinitesimally small interactions. At one-third-filling, the Noninteracting System is a topological insulator, and a nonzero critical interaction strength is needed to drive a transition from the quantum spin Hall insulator to a superfluid. We probe the topological signature of the phase transition by threading a magnetic flux through a cylinder and observe quantized topological charge pumping.
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Pole expansion of self-energy and interaction effect for topological insulators
Physical Review B, 2012Co-Authors: Lei Wang, Hua Jiang, Xi Dai, Xincheng XieAbstract:We study effect of interactions on time-reversal-invariant topological insulators. Their topological indices are expressed by interacting Green's functions. Under the local self-energy approximation, we connect topological index and surface states of an interacting System to an auxiliary Noninteracting System, whose Hamiltonian is related to the pole-expansions of the local self-energy. This finding greatly simplifies the calculation of interacting topological indices and gives an Noninteracting pictorial description of interaction driven topological phase transitions. Our results also bridge studies of the correlated topological insulating materials with the practical dynamical-mean-field-theory calculations.
Xincheng Xie - One of the best experts on this subject based on the ideXlab platform.
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Pole expansion of self-energy and interaction effect for topological insulators
Physical Review B, 2012Co-Authors: Lei Wang, Hua Jiang, Xi Dai, Xincheng XieAbstract:We study effect of interactions on time-reversal-invariant topological insulators. Their topological indices are expressed by interacting Green's functions. Under the local self-energy approximation, we connect topological index and surface states of an interacting System to an auxiliary Noninteracting System, whose Hamiltonian is related to the pole-expansions of the local self-energy. This finding greatly simplifies the calculation of interacting topological indices and gives an Noninteracting pictorial description of interaction driven topological phase transitions. Our results also bridge studies of the correlated topological insulating materials with the practical dynamical-mean-field-theory calculations.
Frane Lunic - One of the best experts on this subject based on the ideXlab platform.
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exact solutions of a model for synthetic anyons in a Noninteracting System
Physical Review B, 2020Co-Authors: Frane Lunic, Marija Todoric, Bruno Klajn, Tena Dubcek, Dario Jukic, Hrvoje BuljanAbstract:We study a theoretical model for synthetic anyons in a Noninteracting quantum many-body System. Synthetic anyons can occur in a Noninteracting System
Matthias Troyer - One of the best experts on this subject based on the ideXlab platform.
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Topological phase transition in the Hofstadter-Hubbard model
Bulletin of the American Physical Society, 2015Co-Authors: Hsiang-hsuan Hung, Lei Wang, Matthias TroyerAbstract:We study the interplay between topological and conventional long range order of attractive fermions in a time reversal symmetric Hofstadter lattice using quantum Monte Carlo simulations, focussing on the case of one-third flux quantum per plaquette. At half-filling, the System is unstable towards s-wave pairing and charge-density-wave order at infinitesimally small interactions. At one-third-filling, the Noninteracting System is a topological insulator, and a nonzero critical interaction strength is needed to drive a transition from the quantum spin Hall insulator to a superfluid. We probe the topological signature of the phase transition by threading a magnetic flux through a cylinder and observe quantized topological charge pumping.
