148 citations · 499 across the 36 of their papers we have counts for
23 papers · 1 filter
Spectral density of the Dirac operator in two-flavour QCD
Georg P. Engel, Leonardo Giusti, Stefano Lottini +1
We compute the spectral density of the (Hermitean) Dirac operator in Quantum Chromodynamics with two light degenerate quarks near the origin. We use CLS/ALPHA lattices generated wi…
On the extraction of spectral quantities with open boundary conditions
Mattia Bruno, Piotr Korcyl, Tomasz Korzec +2
We discuss methods to extract decay constants, meson masses and gluonic observables in the presence of open boundary conditions. The ensembles have been generated by the CLS effort…
Approaching the chiral point in two-flavour lattice simulations
Stefano Lottini
We investigate the behaviour of the pion decay constant and the pion mass in two-flavour lattice QCD, with the physical and chiral points as ultimate goal. Measurements come from t…
Chiral behaviour of the pion decay constant in QCD
Stefano Lottini
As increased statistics and new ensembles with light pions have become available within the CLS effort, we complete previous work by inspecting the chiral behaviour of the pion dec…
Onset Transition to Cold Nuclear Matter from Lattice QCD with Heavy Quarks to
Jens Langelage, Mathias Neuman, Owe Philipsen
We present results of our ongoing studies of an effective three-dimensional theory of thermal lattice QCD with heavy Wilson quarks. This is done by combined strong coupling and hop…
Chiral condensate from the Banks-Casher relation
Georg P. Engel, Leonardo Giusti, Stefano Lottini +1
We report on our ongoing project of determining the chiral condensate of two-flavor QCD from the Banks-Casher relation. We compute the mode number of the O(a)-improved Wilson-Dirac…
Phase transitions in heavy-quark QCD from an effective theory
Michael Fromm, Jens Langelage, Stefano Lottini +2
With combined hopping parameter and strong coupling expansions, we calculate a dimensionally reduced Polyakov-loop effective theory valid for heavy quarks at nonzero temperature an…
Onset Transition to Cold Nuclear Matter from Lattice QCD with Heavy Quarks
Michael Fromm, Jens Langelage, Stefano Lottini +2
Lattice QCD at finite density suffers from a severe sign problem, which has so far prohibited simulations of the cold and dense regime. Here we study the onset of nuclear matter em…
Strong coupling effective theory with heavy fermions
Michael Fromm, Jens Langelage, Stefano Lottini +1
We extend the recently developed strong coupling, dimensionally reduced Polyakov-loop effective theory from finite-temperature pure Yang-Mills to include heavy fermions and nonzero…
The QCD deconfinement transition for heavy quarks and all baryon chemical potentials
Michael Fromm, Jens Langelage, Stefano Lottini +1
Using combined strong coupling and hopping parameter expansions, we derive an effective three-dimensional theory from thermal lattice QCD with heavy Wilson quarks. The theory depen…
Strong-coupling effective action(s) for SU(3) Yang-Mills
Stefano Lottini, Owe Philipsen, Jens Langelage
We apply strong-coupling expansion techniques to finite-temperature lattice pure gauge theory, obtaining dimensionally reduced -symmetric effective theories. The analytic mapp…
Effective Polyakov-loop theory for pure Yang-Mills from strong coupling expansion
Jens Langelage, Stefano Lottini, Owe Philipsen
Lattice Yang-Mills theories at finite temperature can be mapped onto effective 3d spin systems, thus facilitating their numerical investigation. Using strong-coupling expansions we…
Centre symmetric 3d effective actions for thermal SU(N) Yang-Mills from strong coupling series
Jens Langelage, Stefano Lottini, Owe Philipsen
We derive three-dimensional, Z(N)-symmetric effective actions in terms of Polyakov loops by means of strong coupling expansions, starting from thermal SU(N) Yang-Mills theory in fo…
Integrable structures in LGTs near the deconfinement transition
M. Caselle, G. Delfino, P. Giudice +4
In this contribution we review some recent results about the emergence of 2D integrable systems in 3D Lattice Gauge Theories near the deconfinement transition. We focus on some con…
The confining string beyond the free-string approximation in the gauge dual of percolation
Pietro Giudice, Ferdinando Gliozzi, Stefano Lottini
We simulate five different systems belonging to the universality class of the gauge dual of three-dimensional random percolation to study the underlying effective string theory at…
Confining string beyond the free approximation: the case of random percolation
Pietro Giudice, Ferdinando Gliozzi, Stefano Lottini
The random percolation model can be viewed as the dual of a well defined confining gauge theory; since this theory, having no Monte Carlo dynamics at all, is simple to simulate, it…
The monopole mass in the random percolation gauge theory
Pietro Giudice, Ferdinando Gliozzi, Stefano Lottini
We study the behaviour of the monopole at finite temperature in the (2+1)-dimensional lattice gauge theory dual to the percolation model; by exploiting the correspondences to stati…
K-string tensions at finite temperature and integrable models
Michele Caselle, Pietro Giudice, Ferdinando Gliozzi +2
It has recently been pointed out that simple scaling properties of Polyakov correlation functions of gauge systems in the confining phase suggest that the ratios of k-string tensio…
On the conformal anomaly of k-strings
Pietro Giudice, Ferdinando Gliozzi, Stefano Lottini
We discuss the long distance behaviour of the flux tube associated to baryon vertices and argue that, if the gauge system admits stable k-strings, the conformal field theory descri…
Universal properties of the confining string in the random percolation model
Pietro Giudice, Ferdinando Gliozzi, Stefano Lottini
Random percolation can be fully interpreted as a confining pure gauge theory. With numerical high-precision measurements of Polyakov-Polyakov correlators at finite temperature, we…
Broadening of the confining flux tube joining higher-representation sources
Ferdinando Gliozzi, Pietro Giudice, Stefano Lottini
In the context of confining gauge theories we study the flux tube generated by a pair of static sources belonging to higher rank representations of the gauge group. Using a simple…
Quantum fluctuations of k-strings: A case study
Pietro Giudice, Ferdinando Gliozzi, Stefano Lottini
K strings in Yang-Mills theory can be considered as bound states of k elementary confining strings carrying one unit of colour flux. Current estimates of k-string tension sigma_k a…
The glue-ball spectrum of pure percolation
Stefano Lottini, Ferdinando Gliozzi
We present a high-precision numerical study of 3D random percolation viewed as a confining gauge theory. Using large correlation matrices among multiform Wilson loops we determine…