406 citations · 3.5k across the 46 of their papers we have counts for
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Ring exchanges and the supersolid phase of 4He
D. M. Ceperley, B. Bernu
Using Path Integral Monte Carlo we calculate exchange frequencies in bulk hcp 4He as atoms undergo ring exchange. We fit the frequencies to a lattice model and examine whether such…
Optimized Periodic Coulomb Potential in Two Dimension
Markus Holzmann, Bernard Bernu
The 1/r Coulomb potential is calculated for a two dimensional system with periodic boundary conditions. Using polynomial splines in real space and a summation in reciprocal space w…
Specific heat of the S=1/2 Heisenberg model on the kagome lattice: high-temperature series expansion analysis
Gregoire Misguich, Bernard Bernu
We compute specific heat of the antiferromagnetic spin-1/2 Heisenberg model on the kagome lattice. We use a recently introduced technique to analyze high-temperature series expansi…
The Magnetic Ordering of the 3d Wigner Crystal
Ladir Candido, B. Bernu, D. M. Ceperley
Using Path Integral Monte Carlo, we have calculated exchange frequencies as electrons undergo ring exchanges of 2, 3 and 4 electrons in a ``clean'' 3d Wigner crystal (bcc lattice)…