27 citations · 68 across the 5 of their papers we have counts for
5 papers
Low-energy Effective Theory for One-dimensional Lattice Bosons near Integer Filling
Yu-Wen Lee, Yu-Li Lee, Min-Fong Yang
A low-energy effective theory for interacting bosons on a one-dimensional lattice at and near integer fillings is proposed. It is found that two sets of bosonic phase fields are ne…
Low-energy properties of the ferromagnetic metallic phase in manganites: Slave fermion approach to the quantum double exchange model
Yu-Li Lee, Yu-Wen Lee
We study the low energy properties of the one-orbital quantum double-exchange model by using the slave fermion formulation. We construct a mean-field theory which gives a simple ex…
Quantum phases of a Feshbach-resonant atomic Bose gas in one dimension
Yu-Wen Lee, Yu-Li Lee
We study an atomic Bose gas with an s-wave Feshbach resonance in a one-dimensional optical lattice, with the densities of atoms and molecules incommensurate with the lattice. At ze…
Quantum phase transition in an atomic Bose gas near a Feshbach resonance
Yu-Wen Lee, Yu-Li Lee
We study the quantum phase transition in an atomic Bose gas near a Feshbach resonance in terms of the renormalization group. This quantum phase transition is characterized by an Is…
Quantum dynamics of tunneling between ferromagnets
Yu-Li Lee, Yu-Wen Lee
We study the Josephson-like spin currents between two ferromagnetic metals by deriving the effective action of the junction. A DC spin Josephson current with the full O(3) symmetry…