27 citations · 70 across the 7 of their papers we have counts for
7 papers
Chern-Simons Field Theory of Two-Dimensional Electrons in the Lowest Landau Level
Lizeng Zhang
We propose a fermion Chern-Simons field theory describing two- dimensional electrons in the lowest Landau level. This theory is constructed with a complete set of states, and the l…
Finite Temperature Fractional Quantum Hall Effect
Lizeng Zhang
We investigate fractional quantum Hall effect at finite temperature using a fermion Chern-Simons field theoretical approach. In the absence of impurity scattering, the essential as…
Simulating `Complex' Problems with Quantum Monte Carlo
Lizeng Zhang, Geoff Canright, Ted Barnes
We present a new quantum Monte Carlo algorithm suitable for generically complex problems, such as systems coupled to external magnetic fields or anyons in two spatial dimensions. W…
Ground State and Excitations of Disordered Boson Systems
Michael Ma, Pornthep Nisamaneephong, Lizeng Zhang
After an introduction to the dirty bosons problem, we present a gaussian theory for the ground state and excitations. This approach is physically equivalent to the Bogoliubov appro…
A Gaussian Theory of Superfluid--Bose-Glass Phase Transition
P Nisamaneephong, L. Zhang, M. Ma
We show that gaussian quantum fluctuations, even if infinitesimal, are sufficient to destroy the superfluidity of a disordered boson system in 1D and 2D. The critical disorder is t…
Critical Exponents for Three-Dimensional Superfluid--Bose-Glass Phase Transition
Lizeng Zhang, Xiao-Qian Wang
The critical phenomenon of the zero temperature superfluid--Bose-glass phase transition for hard-core bosons on a three-dimensional disordered lattice is studied using a quantum re…