499 citations · 10.2k across the 260 of their papers we have counts for
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Nonperturbative renormalization of asymmetric staple-shaped operators in twisted mass lattice QCD
Constantia Alexandrou, Simone Bacchio, Krzysztof Cichy +8
Staple-shaped Wilson line operators are necessary for the study of transverse momentum-dependent parton distribution functions (TMDPDFs) in lattice QCD and beyond. In this work, we…
Canonical Momenta in Digitized SU(2) Lattice Gauge Theory: Definition and Free Theory
Timo Jakobs, Marco Garofalo, Tobias Hartung +5
Hamiltonian simulations of quantum systems require a finite-dimensional representation of the operators acting on the Hilbert space H. Here we give a prescription for gauge links a…
Computing the Mass Shift of Wilson and Staggered Fermions in the Lattice Schwinger Model with Matrix Product States
Takis Angelides, Lena Funcke, Karl Jansen +1
Simulations of lattice gauge theories with tensor networks and quantum computing have so far mainly focused on staggered fermions. In this paper, we use matrix product states to st…
Exploring the CP-violating Dashen phase in the Schwinger model with tensor networks
Lena Funcke, Karl Jansen, Stefan Kühn
We numerically study the phase structure of the two-flavor Schwinger model with matrix product states, focusing on the (1+1)-dimensional analog of the CP-violating Dashen phase in…
Review on Quantum Computing for Lattice Field Theory
Lena Funcke, Tobias Hartung, Karl Jansen +1
In these proceedings, we review recent advances in applying quantum computing to lattice field theory. Quantum computing offers the prospect to simulate lattice field theories in p…
Lattice calculation of the R-ratio smeared with Gaussian kernel
Constantia Alexandrou, Simone Bacchio, Alessandro De Santis +15
The ratio of the cross-sections for hadrons and is a valuable energy-dependent probe of the hadronic sector of the Standard Model. Moreover, t…
Pseudoscalar-pole contributions to the muon at the physical point
Sebastian Burri, Gurtej Kanwar, Constantia Alexandrou +14
Pseudoscalar-pole diagrams are an important component of estimates of the hadronic light-by-light (HLbL) contribution to the muon . We report on our computation of the transit…
Hamiltonian limit of lattice QED in 2+1 dimensions
L. Funcke, C. F. Groß, K. Jansen +3
The Hamiltonian limit of lattice gauge theories can be found by extrapolating the results of anisotropic lattice computations, i.e., computations using lattice actions with differe…
Digitizing SU(2) Gauge Fields and What to Look Out for When Doing So
Tobias Hartung, Timo Jakobs, Karl Jansen +2
With the long term perspective of using quantum computers and tensor networks for lattice gauge theory simulations, an efficient method of digitizing gauge group elements is needed…
Time windows of the muon HVP from twisted-mass lattice QCD
C. Alexandrou, S. Bacchio, P. Dimopoulos +13
We present a lattice determination of the leading-order hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment, , in the so-called sho…
Disconnected contribution to the LO HVP term of muon g-2 from ETMC
Constantia Alexandrou, Simone Bacchio, Petros Dimopoulos +13
We present a lattice determination of the disconnected contributions to the leading-order hadronic vacuum polarization (HVP) to the muon anomalous magnetic moment in the so-called…
Probing the energy-smeared R-ratio on the lattice
Constantia Alexandrou, Simone Bacchio, Alessandro De Santis +15
We present a first-principles lattice QCD investigation of the -ratio between the cross-section into hadrons and that into muons. By using the method of Ref.[1], that a…
Mass Renormalization of the Schwinger Model with Wilson and Staggered Fermions in the Hamiltonian Lattice Formulation
Takis Angelides, Lena Funcke, Karl Jansen +1
Lattice computations in the Hamiltonian formulation have so far mainly focused on staggered fermions. In these proceedings, we study Wilson fermions in the Hamiltonian formulation…
Defining Canonical Momenta for Discretised SU(2) Gauge Fields
Marco Garofalo, Tobias Hartung, Karl Jansen +3
In this proceeding contribution we discuss how to define canonical momenta for SU(N) lattice gauge theories in the Hamiltonian formalism in a basis where the gauge field operators…
Study of SU(2) gauge theories with multiple Higgs fields in different representations
Guilherme Catumba, Atsuki Hiraguchi, George W. -S. Hou +5
We study two different SU(2) gauge-scalar theories in 3 and 4 spacetime dimensions. Firstly, we focus on the 3 dimensional SU(2) theory with multiple Higgs fields in the adjoint re…
Nucleon transverse quark spin densities
Constantia Alexandrou, Simone Bacchio, Martha Constantinou +9
We present a calculation of the Mellin moments of the nucleon transverse quark spin densities extracted from the unpolarized and transversity generalized form factors. We use three…
Zeta-regularized Lattice Field Theory with Lorentzian background metrics
Tobias Hartung, Karl Jansen, Chiara Sarti
Lattice field theory is a very powerful tool to study Feynman's path integral non-perturbatively. However, it usually requires Euclidean background metrics to be well-defined. On t…
Crystalline phases at finite winding densities in a quantum link ladder
Paolo Stornati, Philipp Krah, Karl Jansen +1
Condensed matter physics of gauge theories coupled to fermions can exhibit a rich phase structure, but are nevertheless very difficult to study in Monte Carlo simulations when they…
Strategies for the Determination of the Running Coupling of -dimensional QED with Quantum Computing
Giuseppe Clemente, Arianna Crippa, Karl Jansen
We propose to utilize NISQ-era quantum devices to compute short distance quantities in -dimensional QED and to combine them with large volume Monte Carlo simulations and per…
Lattice calculation of the short and intermediate time-distance hadronic vacuum polarization contributions to the muon magnetic moment using twisted-mass fermions
C. Alexandrou, S. Bacchio, P. Dimopoulos +13
We present a lattice determination of the leading-order hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment, , in the so-called sho…
First moments of the nucleon transverse quark spin densities using lattice QCD
C. Alexandrou, S. Bacchio, M. Constantinou +9
We present a calculation of the Mellin moments of the transverse quark spin densities in the nucleon using lattice QCD. The densities are extracted from the unpolarized and transve…
Digitising SU(2) Gauge Fields and the Freezing Transition
Tobias Hartung, Timo Jakobs, Karl Jansen +2
Efficient discretisations of gauge groups are crucial with the long term perspective of using tensor networks or quantum computers for lattice gauge theory simulations. For any Lie…
Proton generalized parton distributions from lattice QCD
Aurora Scapellato, Constantia Alexandrou, Krzysztof Cichy +4
Momentum and spatial distributions of quarks and gluons inside hadrons are typically encoded in the so-called generalized parton distributions (GPDs). GPDs are multi-dimensional qu…
Twisted mass gauge ensembles at physical values of the light, strange and charm quark masses
Jacob Finkenrath, Constantia Alexandrou, Simone Bacchio +9
Lattice QCD simulations directly at physical masses of dynamical light, strange and charm quarks are highly desirable especially to remove systematic errors due to chiral extrapola…