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Quantitative Studies on the Quantum Critical Regime near Superfluid to Mott Insulator Transition
Hao Lee, Shiang Fang, Daw-Wei Wang
We investigate the critical behaviors of correlation length and critical exponents for strongly interacting bosons in a two-dimensional optical lattice via quantum Monte Carlo simu…
Tuning the Kosterlitz-Thouless transition to zero temperature in Anisotropic Boson Systems
Jhih-Shih You, Hao Lee, Shiang Fang +2
We study the two-dimensional Bose-Hubbard model with anisotropic hopping. Focusing on the effects of anisotropy on the superfluid properties such like the helicity modulus and the…
Quantum and Thermal Transitions Out of the Pair-Supersolid Phase of Two-Species Bosons in Lattice
Chia-Min Chung, Shiang Fang, Pochung Chen
We investigate two-species bosons in a two-dimensional square lattice by quantum Monte Carlo method. We show that the inter-species attraction and nearest-neighbor intra-species re…
Quantum Criticality from in-situ Density Imaging
Shiang Fang, Chia-Ming Chung, Ping Nang Ma +2
We perform large-scale Quantum Monte Carlo (QMC) simulations for strongly interacting bosons in a 2D optical lattice trap, and confirm an excellent agreement with the benchmarking…
Quantum fluctuations and condensate fraction during the time-of-flight expansion
Shiang Fang, Ray-Kuang Lee, Daw-Wei Wang
The quantum fluctuation effects in the time-of-flight (TOF) experiment for a condensate released from an optical lattice potential is studied within the truncated Wigner approximat…