243 citations · 1.5k across the 22 of their papers we have counts for
22 papers
Three-body contact for fermions. II. Non-degenerate limit
Xavier Leyronas, Félix Werner
A fundamental quantity characterizing Fermi gases with zero-range interactions is the three-body contact , which determines several observables including the number of nearby…
Three-body contact for fermions. I. General relations
Félix Werner, Xavier Leyronas
We consider the resonant Fermi gas, that is, two-component fermions in three dimensions interacting by a short-range potential of large scattering length. We introduce a quantity,…
High-order expansion around BCS theory
G. Spada, R. Rossi, F. Simkovic +4
We demonstrate that summation of connected diagrams to high order starting from a BCS hamiltonian is a viable generic unbiased approach for strongly correlated fermions in supercon…
Polynomial complexity despite the fermionic sign
R. Rossi, N. Prokof'ev, B. Svistunov +2
It is commonly believed that in quantum Monte Carlo approaches to fermionic many- body problems, the infamous sign problem generically implies prohibitively large computational tim…
Shifted-Action Expansion and Applicability of Dressed Diagrammatic Schemes
Riccardo Rossi, Felix Werner, Nikolay Prokof'ev +1
While bare diagrammatic series are merely Taylor expansions in powers of interaction strength, dressed diagrammatic series, built on fully or partially dressed lines and vertices,…
Skeleton series and multivaluedness of the self-energy functional in zero space-time dimensions
Riccardo Rossi, Felix Werner
Recently, Kozik, Ferrero and Georges have discovered numerically that for a family of fundamental models of interacting fermions, the self-energy is a multi-valued functiona…