65 citations · 274 across the 12 of their papers we have counts for
12 papers
Downfolding a quantum many-body system: the quasi-1D Fermi polaron
Lovro Anto Barišić, Giuliano Orso, Frédéric Chevy +1
We investigate the properties of an impurity immersed in an ensemble of spin-polarized fermions confined in a tight quantum wire. We use a non-perturbative variational approach tha…
Quasi-particle residue and charge of the one-dimensional Fermi polaron
Giuliano Orso, Lovro Barišić, Ekaterina Gradova +2
We consider a mobile impurity coupled to an ideal Fermi gas in one spatial dimension through an attractive contact interaction. We calculate the quasi-particle residue exactly,…
On polarons and dimerons in the two-dimensional attractive Hubbard model
Gerard Pascual, Jordi Boronat, Kris Van Houcke
A two-dimensional spin-up ideal Fermi gas interacting attractively with a spin-down impurity in the continuum undergoes, at zero temperature, a first-order phase transition from a…
High-precision numerical solution of the Fermi polaron problem and large-order behavior of its diagrammatic series
K. Van Houcke, F. Werner, R. Rossi
We introduce a simple determinant diagrammatic Monte Carlo algorithm to compute the ground-state properties of a particle interacting with a Fermi sea through a zero-range interact…
Resummation of diagrammatic series with zero convergence radius for strongly correlated fermions
Riccardo Rossi, Takahiro Ohgoe, Kris Van Houcke +1
We demonstrate that summing up series of Feynman diagrams can yield unbiased accurate results for strongly-correlated fermions even when the convergence radius vanishes. We conside…
The competition between superconductivity and ferromagnetism in small metallic grains: thermodynamic properties
K. Van Houcke, Y. Alhassid, S. Schmidt +1
We study the thermodynamic properties of a small superconducting metallic grain using a quantum Monte Carlo method. The grain is described by the universal Hamiltonian, containing…