743 citations · 4.7k across the 145 of their papers we have counts for
150 papers
Diquark properties from full QCD lattice simulations
Anthony Francis, Philippe de Forcrand, Randy Lewis +1
We study diquarks on the lattice in the background of a static quark, in a gauge-invariant formalism with quark masses down to almost physical . We determine mass differences…
Topological Susceptibility under Gradient Flow
Héctor Mejía-Díaz, Wolfgang Bietenholz, Krzysztof Cichy +4
We study the impact of the Gradient Flow on the topology in various models of lattice field theory. The topological susceptibility is measured directly, and by the slab…
Spin models in complex magnetic fields: a hard sign problem
Philippe de Forcrand, Tobias Rindlisbacher
Coupling spin models to complex external fields can give rise to interesting phenomena like zeroes of the partition function (Lee-Yang zeroes, edge singularities) or oscillating pr…
Alternatives to the stochastic "noise vector" approach
Philippe de Forcrand, Benjamin Jaeger
Several important observables, like the quark condensate and the Taylor coefficients of the expansion of the QCD pressure with respect to the chemical potential, are based on the t…
Strong-Coupling Lattice QCD on Anisotropic Lattices
Philippe de Forcrand, Wolfgang Unger, Helvio Vairinhos
Anisotropic lattice spacings are mandatory to reach the high temperatures where chiral symmetry is restored in the strong coupling limit of lattice QCD. Here, we propose a simple c…
Topology in the 2d Heisenberg Model under Gradient Flow
Ilya O. Sandoval, Wolfgang Bietenholz, Philippe de Forcrand +2
The 2d Heisenberg model --- or 2d O(3) model --- is popular in condensed matter physics, and in particle physics as a toy model for QCD. Along with other analogies, it shares with…
The Slab Method to Measure the Topological Susceptibility
Wolfgang Bietenholz, Krzysztof Cichy, Philippe de Forcrand +2
In simulations of a model with topological sectors, algorithms which proceed in small update steps tend to get stuck in one sector, especially on fine lattices. This distorts the n…
Worm Algorithm for CP(N-1) Model
Tobias Rindlisbacher, Philippe de Forcrand
The CP(N-1) model in 2D is an interesting toy model for 4D QCD as it possesses confinement, asymptotic freedom and a non-trivial vacuum structure. Due to the lower dimensionality a…
Sampling of General Correlators in Worm Algorithm-based Simulations
Tobias Rindlisbacher, Oscar Akerlund, Philippe de Forcrand
Using the complex -model as a prototype for a system which is simulated by a worm algorithm, we show that not only the charged correlator , but also more gener…
Oscillating propagators in heavy-dense QCD
Oscar Akerlund, Philippe de Forcrand, Tobias Rindlisbacher
Using Monte Carlo simulations and extended mean field theory calculations we show that the -dimensional spin model with complex external fields has non-monotonic spatial c…
Mean distribution approach to spin and gauge theories
Oscar Akerlund, Philippe de Forcrand
We formulate self-consistency equations for the distribution of links in spin models and of plaquettes in gauge theories. This improves upon known mean-field, mean-link, and mean-p…
Aspects of topological actions on the lattice
Oscar Akerlund, Philippe de Forcrand
We consider a lattice action which forbids large fields, and which remains invariant under smooth deformations of the field. Such a "topological" action depends on one parameter, t…
Lattice simulation of the SU(2) chiral model at zero and non-zero pion density
Tobias Rindlisbacher, Philippe de Forcrand
We propose a flux representation based lattice formulation of the partition function corresponding to the SU(2) principal chiral Lagrangian, including a chemical potential and scal…
Effects of higher dimension operators on the Standard Model Higgs sector
Oscar Akerlund, Philippe de Forcrand, Jakob Steinbauer
We study the effect of higher dimension operators on the electroweak finite temperature phase transition in two sectors of the Standard Model. Firstly, the Higgs-Yukawa sector, con…
Topological Susceptibility from Slabs
Wolfgang Bietenholz, Philippe de Forcrand, Urs Gerber
In quantum field theories with topological sectors, a non-perturbative quantity of interest is the topological susceptibility chi_t. In principle it seems straightforward to measur…
Two-Flavor Lattice QCD with a Finite Density of Heavy Quarks: Heavy-Dense Limit and "Particle-Hole" Symmetry
Tobias Rindlisbacher, Philippe de Forcrand
We investigate the properties of the half-filling point in lattice QCD (LQCD), in particular the disappearance of the sign problem and the emergence of an apparent particle-hole sy…
Higgs-Yukawa model with higher dimension operators via extended mean field theory
Oscar Akerlund, Philippe de Forcrand
Using extended mean field theory (EMFT) on the lattice, we study properties of the Higgs-Yukawa model as an approximation of the standard model Higgs sector, and the effect of high…
Euclidean Dynamical Triangulation revisited: is the phase transition really 1st order? (extended version)
Tobias Rindlisbacher, Philippe de Forcrand
The transition between the two phases of 4D Euclidean Dynamical Triangulation [1] was long believed to be of second order until in 1996 first order behavior was found for sufficien…
Condensation phenomena in two-flavor scalar QED at finite chemical potential
Alexander Schmidt, Philippe de Forcrand, Christof Gattringer
We study condensation in two-flavored, scalar QED with non-degenerate masses at finite chemical potential. The conventional formulation of the theory has a sign problem at finite d…
Deformations of infrared-conformal theories in two dimensions
Oscar Akerlund, Philippe de Forcrand
We study two exactly solvable two-dimensional conformal models, the critical Ising model and the Sommerfield model, on the lattice. We show that finite-size effects are important a…
Lattice gauge theory without link variables
Helvio Vairinhos, Philippe de Forcrand
We obtain a sequence of alternative representations for the partition function of pure SU(N) or U(N) lattice gauge theory with the Wilson plaquette action, using the method of Hubb…
The chiral phase transition in two-flavor QCD from imaginary chemical potential
Claudio Bonati, Philippe de Forcrand, Massimo D'Elia +2
We investigate the order of the finite temperature chiral symmetry restoration transition for QCD with two massless fermions, by using a novel method, based on simulating imaginary…
The lattice QCD phase diagram in and away from the strong coupling limit
Philippe de Forcrand, Jens Langelage, Owe Philipsen +1
We study lattice QCD with four flavors of staggered quarks. In the limit of infinite gauge coupling, "dual" variables can be introduced, which render the finite-density sign proble…
Extended Mean Field study of complex -theory at finite density and temperature
Oscar Akerlund, Philippe de Forcrand, Antoine Georges +1
We review the Extended Mean Field Theory (EMFT) approximation and apply it to complex, scalar -theory on the lattice. We study the critical properties of the Bose condensation…