156 citations · 266 across the 11 of their papers we have counts for
11 papers
Exact eigenstates with off-diagonal long-range order for interacting bosonic systems
C. H. Zhang, Z. Song
Fermions and hardcore bosons share the same restriction: no more than one particle can occupy a single site in a lattice system. Specifically, in one dimension, two systems can sha…
Coalescing hardcore-boson condensate states with nonzero momentum
C. H. Zhang, Z. Song
Exceptional points (EPs), as an exclusive feature of a non-Hermitian system, support coalescing states to be alternative stable state beyond the ground state. In this work, we expl…
Generalized phantom helix states in quantum spin graphs
C. H. Zhang, Y. B. Shi, Z. Song
In general, the summation of a set of sub-Hamiltonians cannot share a common eigenstate of each one, only if it is an unentangled product state, such as a phantom helix state in qu…
Excitonic condensation of massless fermions in graphene bilayers
C. -H. Zhang, Yogesh N. Joglekar
Graphene, a single sheet of graphite with honeycomb lattice structure, has massless carriers with tunable density and polarity. We investigate the ground state phase diagram of two…
Influence of Landau-level mixing on Wigner crystallization in graphene
C. -H. Zhang, Yogesh N. Joglekar
Graphene, with its massless linearly-dispersing carriers, in the quantum Hall regime provides an instructive comparison with conventional two-dimensional (2D) systems in which carr…
Supersolid of indirect excitons in electron-hole quantum Hall systems
C. -H. Zhang, Yogesh N. Joglekar
We investigate the ground state of a balanced electron-hole system in the quantum Hall regime using mean-field theory and obtain a rich phase diagram as a function of interlayer di…