A solution for infinite variance problem of fermionic observablesFermionic Monte Carlo calculations with continuous auxiliary fields often encounter infinite variance problem from fermionic observables. This issue renders the estimation of observables unreliable,…Hyunwoo Oh, Andrei Alexandru, Paulo F. Bedaque et al.·Nov 27, 2023SaveLearn
Testing the SU(2) lattice Hamiltonian built from S3 partitioningsWe test a possible digitization of SU(2) lattice gauge theories based on partitionings of the sphere S3. In our construction the link operators are unitary and diagonal, with…Marco Garofalo, Tobias Hartung, Timo Jakobs et al.·Nov 27, 2023SaveLearn
Mass effects on the QCD β-functionIn this study we present lattice results on the QCD β-function in the presence of quark masses. The β-function is calculated to three loops in perturbation theory and for improved lattice…Marios Costa, Demetrianos Gavriel, Haralambos Panagopoulos et al.·Nov 27, 2023SaveLearn
Prospects for the stout smearing as an equivalent approach to the Wilson flowWe present the equivalence between the Wilson flow and the stout smearing. The similarity between these two methods was first pointed out by L\"uscher's original paper on the Wilson flow. We first…Masato Nagatsuka, Keita Sakai, Shoichi Sasaki·Nov 27, 2023SaveLearn
New configuration set of HAL QCD collaborationWe give a brief report on the basic properties and cutoff scale of our new configuration set (HAL-Conf-2023). We generated 8,000 trajectories of the gauge configurations on 964 lattices with the…Etsuko Itou for HAL QCD collaboration·Nov 27, 2023SaveLearn
Speed of sound exceeding the conformal bound in dense 2-color QCDWe review recent works on the Monte Carlo simulations of dense two-color QCD (QC2D) by focusing on the phase diagram, the equation of state, and the sound velocity at nonzero quark chemical…Etsuko Itou, Kei Iida·Nov 26, 2023SaveLearn
Sparse modeling approach to extract spectral functions with covariance of Euclidean-time correlators of lattice QCDWe present our sparse modeling study to extract spectral functions from Euclidean-time correlation functions. In this study covariance between different Euclidean times of the correlation function is…Junichi Takahashi, Hiroshi Ohno, Akio Tomiya·Nov 26, 2023SaveLearn
Nonperturbative running of the tensor operator for Nf=3 QCD from the chirally rotated Schr\"odinger FunctionalWe study the Renormalisation Group (RG) running of the non-singlet tensor operator, for N f=3 QCD with Wilson fermions in a mixed action setup, with standard Schr\"odinger…Isabel Campos Plasencia, Mattia Dalla Brida, Giulia Maria de Divitiis et al.·Nov 25, 2023SaveLearn
Studying the phase diagram of the three-flavor Schwinger model in the presence of a chemical potential with measurement- and gate-based quantum computingWe propose an ansatz quantum circuit for the variational quantum eigensolver (VQE), suitable for exploring the phase structure of the multi-flavor Schwinger model in the presence of a chemical…Stephan Schuster, Stefan Kühn, Lena Funcke et al.·Nov 24, 2023SaveLearn
The quenched glueball spectrum from smeared spectral densitiesThe standard approach to compute the glueball spectrum on the lattice relies on the evaluation of effective masses from two-point correlation functions of operators with the quantum numbers of the…Marco Panero, Antonio Smecca, Nazario Tantalo et al.·Nov 24, 2023SaveLearn
Lattice investigations of the chimera baryon spectrum in the Sp(4) gauge theoryWe report the results of lattice numerical studies of the Sp(4) gauge theory coupled to fermions (hyperquarks) transforming in the fundamental and two-index antisymmetric representations of the gauge…Ed Bennett, Deog Ki Hong, Ho Hsiao et al.·Nov 24, 2023SaveLearn
A pion decay constant in the multi-flavor Schwinger modelThe pion decay constant Fπ plays an important role in QCD and in Chiral Perturbation Theory. It is hardly known, however, that a corresponding constant exists in the Schwinger model with…Jaime Fabián Nieto Castellanos, Ivan Hip, Wolfgang Bietenholz·Nov 24, 2023SaveLearn
The Thirring Model in 2+1d with Optimised Domain Wall FermionsAfter briefly reviewing the potential for the N-flavor Thirring model, formulated with reducible fermions in 2+1d, to exhibit a strongly-coupled UV-stable fixed point where U(2N) symmetry is…Simon Hands, Jude Worthy·Nov 23, 2023SaveLearn
Lee-Yang and Langer edge singularities from analytic continuation of scaling functionsWe discuss the analytic continuation of scaling function in the 3-dimensional Z(2),O(2) andO(4) universality classes using the Schofield representation of the magnetic equation of state. We show that…Frithjof Karsch, Christian Schmidt, Simran Singh·Nov 22, 2023SaveLearn
Non-equilibrium dynamics of topological defects in the 3d O(2) modelWe present a study of the 3d O(2) non-linear σ-model on the lattice, which exhibits topological defects in the form of vortices. They tend to organize into vortex lines that bear close…Edgar López-Contreras, Jaime Fabián Nieto Castellanos, Elías Natanael Polanco-Euán et al.·Nov 22, 2023SaveLearn
Convex optimization and contour deformationsWe discuss various formal aspects of contour deformations used to alleviate sign problems; most importantly, relating these contour deformations to a certain convex optimization problem. As a…Scott Lawrence, Yukari Yamauchi·Nov 21, 2023SaveLearn
Propagator zeros and lattice chiral gauge theoriesSymmetric mass generation (SMG) has been advocated as a mechanism to render mirror fermions massive without symmetry breaking, ultimately aiming for the construction of lattice chiral gauge theories.…Maarten Golterman, Yigal Shamir·Nov 21, 2023SaveLearn
Digitizing lattice gauge theories in the magnetic basis: reducing the breaking of the fundamental commutation relationsWe present a digitization scheme for the lattice SU(2) gauge theory Hamiltonian in the magnetic basis, where the gauge links are unitary and diagonal. The…Simone Romiti, Carsten Urbach·Nov 20, 2023SaveLearn
Dense QCD2 with matrix product statesWe study one-flavor SU(2) and SU(3) lattice QCD in (1+1) dimensions at zero temperature and finite density using matrix product states and the density matrix renormalization…Tomoya Hayata, Yoshimasa Hidaka, Kentaro Nishimura·Nov 20, 2023SaveLearn
Quantum Simulation of Finite Temperature Schwinger Model via Quantum Imaginary Time EvolutionWe study the Schwinger model at finite-temperature regime using a quantum-classical hybrid algorithm. The preparation of thermal state on quantum circuit presents significant challenges. To address…Juan W. Pedersen, Etsuko Itou, Rong-Yang Sun et al.·Nov 20, 2023SaveLearn
2023 Update of K with lattice QCD inputsWe report recent progress on K evaluated directly from the standard model (SM) with lattice QCD inputs such as BK, |Vcb|, |Vus|, |Vud|, 0, 2,…Seungyeob Jwa, Jeehun Kim, Sunghee Kim et al.·Nov 20, 2023SaveLearn
Chemical potential dependence of the endpoint of first-order phase transition in heavy-quark region of finite-temperature lattice QCDWe determine the location of the critical point where the first-order deconfining transition in the heavy-quark region turns into a crossover in finite-temperature and density lattice QCD with 2+1…Shinji Ejiri, Kazuyuki Kanaya, Masakiyo Kitazawa·Nov 20, 2023SaveLearn
Equivalence of lattice operators and graph matricesWe explore the relationship between lattice field theory and graph theory, placing special emphasis on the interplay between Dirac and scalar lattice operators and matrices within the realm of…Jun Yumoto, Tatsuhiro Misumi·Nov 19, 2023SaveLearn
Simplified algorithm for the Worldvolume HMC and the Generalized-thimble HMCThe Worldvolume Hybrid Monte Carlo method (WV-HMC method) [arXiv:2012.08468] is a reliable and versatile algorithm towards solving the sign problem. Similarly to the tempered Lefschetz thimble…Masafumi Fukuma·Nov 17, 2023SaveLearn
Investigation of the hadronic light-by-light contribution to the muon g-2 using staggered fermionsHadronic contributions dominate the uncertainty of the standard model prediction for the anomalous magnetic moment of the muon. In this work, we describe an ongoing lattice calculation of the…Christian Zimmermann, Antoine Gérardin·Nov 17, 2023SaveLearn