1.8k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Thomas Jefferson National Accelerator FacilityUS402 papers
- University of GlasgowGB304 papers
- William & MaryUS287 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR272 papers
- Centre National de la Recherche ScientifiqueFR271 papers
- University of VirginiaUS271 papers
- A. Alikhanyan National LaboratoryAM264 papers
- Old Dominion UniversityUS262 papers
- Florida International UniversityUS261 papers
- Catholic University of AmericaUS260 papers
- Ohio UniversityUS253 papers
- Carnegie Mellon UniversityUS235 papers
9 papers · 2 filters
Sign problem and Monte Carlo calculations beyond Lefschetz thimbles
Andrei Alexandru, Gokce Basar, Paulo F. Bedaque +2
We point out that Monte Carlo simulations of theories with severe sign problems can be profitably performed over manifolds in complex space different from the one with fixed imagin…
The pole structure of the Lambda(1405) in a recent QCD simulation
R. Molina, M. Doring
The baryon is difficult to detect in experiment, absent in many quark model calculations, and supposedly manifested through a two-pole structure. Its uncommon properties…
Classifying the Phases of Gauge Theories by Spectral Density of Probing Chiral Quarks
Andrei Alexandru, Ivan Horváth
We describe our recent proposal that distinct phases of gauge theories with fundamental quarks translate into specific types of low-energy behavior in Dirac spectral density. The r…
Resonance Parameters for the rho-meson from Lattice QCD
Dehua Guo, Andrei Alexandru
We present a calculation of the phase-shift for - scattering in isospin-1, spin-1 channel in the elastic region. The mass and width of the rho resonance is extracted by fitti…
N and strangeness sigma terms at the physical point with chiral fermions
Yi-Bo Yang, Andrei Alexandru, Terrence Draper +2
Lattice QCD calculations with chiral fermions of the N sigma term and strangeness sigma term including chiral interpolation with continuum and volume correctio…
A Monte Carlo algorithm for simulating fermions on Lefschetz thimbles
Andrei Alexandru, Gokce Basar, Paulo Bedaque
A possible solution of the notorious sign problem preventing direct Monte Carlo calculations for systems with non-zero chemical potential is to deform the integration region in the…
Stochastic method with low mode substitution for nucleon isovector matrix elements
Yi-Bo Yang, Andrei Alexandru, Terrence Draper +2
We introduce a stochastic sandwich method with low-mode substitution to evaluate the connected three-point functions. The isovector matrix elements of the nucleon for the axial-vec…
Phases of SU(3) Gauge Theories with Fundamental Quarks via Dirac Spectral Density
Andrei Alexandru, Ivan Horváth
We propose that, in SU(3) gauge theories with fundamental quarks, confinement can be inferred from spectral density of the Dirac operator. This stems from the proposition that its…
Pion electric polarizability from lattice QCD
Andrei Alexandru, Michael Lujan, Walter Freeman +1
Electromagnetic polarizabilities are important parameters for understanding the interaction between photons and hadrons. For pions these quantities are poorly constrained experimen…