1 citations · 1 across the 6 of their papers we have counts for
14 papers
One-band Hubbard model with hopping asymmetry and the effective theory at finite U: Phase diagram and metal-insulator transition
Yuchuan Wen, Yue Yu
We study the one-band Hubbard model at half filling with hopping asymmetry and its effective model at finite but large U up to the second order of tmix/U. Two variational wave func…
Incompressible excitonic superfluid of ultracold Bose atoms in an optical lattice: a new superfluid phase in the one-component Bose-Hubbard model
Yue Yu
We predict that a new superfluid phase, the incompressible excitonic superfluid (IESF), in the phase diagram of ultracold Bose atoms in dimensional optical lattices, which is…
Time-evolution stability of order parameters and phase diagrams of bosons on optical lattice
Yue Yu
Stemming from the Heisenberg equations of motion, we study the time-evolution stability of the order parameters for the cold atoms on optical lattices. The requirement of this stab…
Comments on `Rashba precession in quantum wire with interaction'
Yue Yu
In a recent Rapid Communication (Phys. Rev. B {\bf 63}, 121210(R) (2001)), Haüsler showed that the interaction between electrons in quantum wires may enhance the persistent spin cu…
From Hubbard model to t-J-U model: a canonical transformation formalism, the metal-insulator transition and mean-field state
Yue Yu
We prove that the t-J-U model can be deduced from the Hubbard model at a large but finite U by a canonical transformation. We argue that the system may have a metal-insulator trans…
Gossamer supercoductivity and the mean field approximation of a new effective Hubbard model
Yue Yu
We construct a new effective two-dimensional Hubbard model by taking the different electron occupancy on site into account. The mean field state of the new Hamiltonian gives rise t…