A5012387297- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Quantum chaos and dynamical systems
- Dark Matter and Cosmic Phenomena
- Spectral Theory in Mathematical Physics
- Nuclear physics research studies
- Physics of Superconductivity and Magnetism
- Advanced NMR Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Geometric Analysis and Curvature Flows
- Fluid Dynamics and Turbulent Flows
- Quantum Computing Algorithms and Architecture
- Numerical methods for differential equations
- Quantum, superfluid, helium dynamics
- Particle Detector Development and Performance
- Geometry and complex manifolds
- Atomic and Molecular Physics
- Quantum many-body systems
- Quantum Information and Cryptography
- Random lasers and scattering media
- Matrix Theory and Algorithms
- Radioactive Decay and Measurement Techniques
RWTH Aachen University
2023-2025
Lawrence Berkeley National Laboratory
2022-2025
University of California, Berkeley
2022-2025
Michigan State University
2018-2025
University of California System
2025
Centre National de la Recherche Scientifique
2022-2023
Goethe University Frankfurt
2021-2023
European Organization for Nuclear Research
2013-2023
Trinity College Dublin
2022-2023
Forschungszentrum Jülich
2014-2023
Abstract Molecules containing short-lived, radioactive nuclei are uniquely positioned to enable a wide range of scientific discoveries in the areas fundamental symmetries, astrophysics, nuclear structure, and chemistry. Recent advances ability create, cool, control complex molecules down quantum level, along with recent upcoming species production at several facilities around world, create compelling opportunity coordinate combine these efforts bring precision measurement extreme nuclei. In...
We calculate the electric dipole moment of nucleon induced by quantum chromodynamics $\ensuremath{\theta}$ term. use gradient flow to define topological charge and ${N}_{f}=2+1$ flavors dynamical quarks corresponding pion masses 700, 570, $410\phantom{\rule{0.16em}{0ex}}\mathrm{MeV}$, perform an extrapolation physical point based on chiral perturbation theory. calculations at three different lattice spacings in range...
We introduce new discretizations of the action for static quarks. They achieve an exponential improvement (compared to Eichten-Hill regularization) on signal noise ratio in static-light correlation functions. This is explicitly checked a quenched simulation and it understood quantitatively terms self energy quark lattice heavy potential at zero distance. perform set scaling tests Schrödinger functional find violations O(a) improved theory be rather small — one observable significantly...
Standard methods for including electromagnetic interactions in lattice quantum chromodynamics calculations result power-law finite-volume corrections to physical quantities. Removing these by extrapolation requires costly computations at multiple volumes. We introduce a photon mass alternatively regulate the infrared, and rely on effective field theory remove its unphysical effects. Electromagnetic modifications hadron spectrum are reliably estimated with precision cost comparable...
A bstract The quark chromoelectric dipole (qCEDM) operator is a CP-violating describing, at hadronic energies, beyond-the-standard-model contributions to the electric moment of particles with nonzero spin. In this paper we define renormalized operators in regularization-independent scheme using gradient flow, and perform matching one loop perturbation theory same lower dimension more familiar MS scheme. We also determine coefficients for chromo-magnetic (qCMDM), which contributes example...
We present a comparison of different quantum state preparation algorithms and their overall efficiency for the Schwinger model with theta term. While adiabatic is proved to be effective, in practice it leads large gate counts prepare ground state. The approximate optimization algorithm (QAOA) provides excellent results while keeping small by design, at cost an expensive classical minimization process. introduce “blocked” modification Hamiltonian used QAOA that further decreases length as...
We propose a new method to calculate electric dipole moments induced by the strong QCD $\ensuremath{\theta}$ term. The is based on gradient flow for gauge fields and free from renormalization ambiguities. test our computing nucleon in pure Yang-Mills theory at several lattice spacings, enabling first-of-its-kind continuum extrapolation. rather general can be applied any quantity computed vacuum. This first application of has been successful demonstrates proof-of-principle, thereby providing...
Fermionic gradient flow in combination with the short-flow-time expansion provides a computational method where renormalisation of hadronic matrix elements on lattice can be simplified to address e.g.~the issue that operators different mass dimension mix. We demonstrate our procedure by determining four-quark describing neutral meson mixing or lifetimes. While calculations are well-established and serve validate procedure, calculation for heavy lifetimes is still outstanding. Preliminary...
Measurements of a permanent neutron electric dipole moment (EDM) potentially probe beyond-the-Standard Model (BSM) sources $CP$-violation. At low energy the $CP$-violating BSM interactions are parametrized by flavor-conserving operators dimension higher than four. QCD calculations nucleon matrix elements these required to fully reconstruct and magnitudes different contributions EDM. Herein we study quark-chromoelectric (qCEDM) operator three-gluon Weinberg operator. The nonperturbative...
We describe a procedure to determine moments of parton distribution functions any order in lattice quantum chromodynamics (QCD). The is based on the gradient flow for fermion and gauge fields. flowed matrix elements twist-2 operators renormalize multiplicatively, matching with physical can be obtained using continuum symmetries irreducible representations Euclidean 4-dimensional rotations. calculate coefficients at one-loop perturbation theory flavor nonsinglet case. also give specific...
The chromo-magnetic dipole operator is expressed in terms of operators at finite flow time the gradient-flow formalism. matching coefficients are evaluated through next-to-next-to-leading order QCD.
We compute the lattice spacing corrections to spectral density of Hermitean Wilson Dirac operator using Chiral Perturbation Theory at NLO. consider a regime where quark mass m and obey relative power counting $ \sim a\Lambda_{\text{QCD}}^2 : in this situation discretisation effects can be treated as perturbation continuum behaviour. While framework fails describe close threshold, it allows nevertheless investigate important properties spectrum operator. discuss range validity our results...
Non-singlet chiral Ward identities for fermionic operators at positive flow-time are derived using standard techniques based on local variations of the action and operators. The gradient flow formalism is applied to twisted mass fermions it shown that automatic O(a) improvement Wilson maximal twist a property valid also flow-time. A definition condensate multiplicatively renormalizable automatically improved then derived.
The $CP$-violating quark chromoelectric dipole moment (qCEDM) operator, contributing to the electric (EDM), mixes under renormalization and---particularly on lattice---with pseudoscalar density. mixing coefficient is power-divergent with inverse lattice spacing squared, $1/{a}^{2}$, regardless of action used. We use gradient flow define a multiplicatively renormalized qCEDM operator and study its behavior at small time. determine nonperturbatively linearly divergent time, $1/t$, up...
The calculation of the neutron electric dipole moment within effective field theories for physics beyond Standard Model requires non-perturbative hadronic matrix elements operators composed quark and gluon fields. In order to use input from lattice computations, these must be translated a scheme suitable QCD minimal-subtraction used in effective-field-theory framework. accuracy goal context necessitates at least one-loop matching calculation. Here, we provide coefficients CP-odd three-gluon...
In this proceedings, we lay the foundation for computing contribution of quark chromo-electric dipole moment (qCEDM) operator to nucleon electric moment. By applying gradient flow technique, can parameterize renormalization and mixing issues associated with qCEDM on lattice. As angle $\alpha_N$ is a key component determining neutron proton moments induced by operator, present formalism preliminary results respect time $t_f$. The are computed $N_f=2+1$ Wilson-clover lattices provided...