3 citations · 6 across the 6 of their papers we have counts for
6 papers
Charge density wave and quantum fluctuations in a molecular crystal
N. Macris, C. -A. Piguet
We consider an electron-phonon system in two and three dimensions on square, hexagonal and cubic lattices. The model is a modification of the standard Holstein model where the opti…
Coexistence of long-range order for two observables at finite temperatures
N. Macris, C. -A. Piguet
We give a criterion for the simultaneous existence or non existence of two long-range orders for two observables, at finite temperatures, for quantum lattice many body systems. Our…
SU(m|n) supersymmetric Calogero-Sutherland model confined in harmonic potential
C. A. Piguet, D. F. Wang, C. Gruber
In this work, we study a continuous quantum system of a mixture of bosons and fermions with the supersymmetry SU(m|n). The particles are confined in a harmonic well and interact wi…
A remark on off-diagonal long range order
C. A. Piguet, D. F. Wang, C. Gruber
In this work, we study some general property of a strongly correlated electron system defined on a lattice. Assuming that the lattice system exhibits off-diagonal long range order,…
Exactly solvable multi-channel Kondo lattice model
C. -A. Piguet, D. F. Wang, C. Gruber
In this work, a multichannel Kondo lattice model is studied in the thermodynamic limit. The conduction band is described by a constant hopping amplitude between any pair of lattice…
Quantum duality and Bethe-ansatz for the Hofstadter problem on hexagonal lattice
C. A. Piguet, D. F. Wang, C. Gruber
The Hofstadter problem is studied on hexagonal lattice. We first establish a relation between the spectra for the hexagonal lattice and for its dual he triangular lattice. Followin…