67 citations · 267 across the 11 of their papers we have counts for
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Phase diagram of the two-dimensional O(3) model from dual lattice simulations
Falk Bruckmann, Christof Gattringer, Thomas Kloiber +1
We have simulated the asymptotically free two-dimensional O(3) model at nonzero chemical potential using the model's dual representation. We first demonstrate how the latter solves…
The two-dimensional O(3) model at nonzero density: from dual lattice simulations to repulsive bosons
Falk Bruckmann, Christof Gattringer, Thomas Kloiber +1
We discuss the thermodynamics of the O(3) nonlinear sigma model in 1+1 dimensions at nonzero chemical potential (equivalent to a magnetic field). In its conventional field theory r…
Finite density non-linear sigma model and low energy physics
Falk Bruckmann, Christof Gattringer, Thomas Kloiber +1
We present lattice results for simulations of the non-linear sigma model at finite chemical potential. The complex action problem is overcome by a dual variable representati…
Dual representation for massless fermions with chemical potential and U(1) gauge fields
Christof Gattringer, Thomas Kloiber, Vasily Sazonov
Complex action problems coming from either a chemical potential or a topological term have been solved for several models in recent years by mapping them to so-called dual degrees…
Grand canonical ensemble, multi-particle wave functions, scattering data, and lattice field theories
Falk Bruckmann, Christof Gattringer, Thomas Kloiber +1
We show that information about scattering data of a quantum field theory can be obtained from studying the system at finite density and low temperatures. In particular we consider…
Dual simulation of the 2-dimensional lattice U(1) gauge-Higgs model with a topological term
Christof Gattringer, Thomas Kloiber, Michael Müller-Preussker
The 2-dimensional U(1) gauge-Higgs model with a topological term is a simple example of a lattice field theory where the complex action problem comes from the topological term. We…
Dual lattice representations for O(N) and CP(N-1) models with a chemical potential
Falk Bruckmann, Christof Gattringer, Thomas Kloiber +1
We derive dual representations for O(N) and CP(N-1) models on the lattice. In terms of the dual variables the partition sums have only real and positive contributions also at finit…
Solving the sign problems of the massless lattice Schwinger model with a dual formulation
Christof Gattringer, Thomas Kloiber, Vasily Sazonov
We derive an exact representation of the massless Schwinger model on the lattice in terms of dual variables which are configurations of loops, dimers and plaquette occupation numbe…
Scalar QED with a topological term - a lattice study in a dual representation
Thomas Kloiber, Christof Gattringer
We present a dual representation for the partition function of 2-dimensional scalar quantum electrodynamics with a topological term (-term). In the dual representation the compl…
Dual Methods for Lattice Field Theories at Finite Density
Thomas Kloiber, Christof Gattringer
We present a dual representation of the partition function of the charged scalar field in which the complex action problem at non-zero chemical potential is absent. In this dual re…
Spectroscopy in finite density lattice field theory: An exploratory study in the relativistic Bose gas
Christof Gattringer, Thomas Kloiber
We analyze 2-point functions in the relativistic Bose gas on the lattice, i.e., a charged scalar phi-4 field with chemical potential mu. Using a generalized worm algorithm we perfo…
Lattice study of the Silver Blaze phenomenon for a charged scalar phi-4 field
Christof Gattringer, Thomas Kloiber
We analyze a complex scalar field with phi-4 interaction and a chemical potential mu on the lattice. An exact flux representation of the partition sum is used which avoids the comp…