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Satvir Kaur (Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou)
The structure of $\rho$-meson is investigated through the leading-twist momentum-dependent parton distribution functions within the basis light-front quantized (BLFQ) framework. To begin with, the light-front wavefunctions (LFWFs) are computed by truncating the light-front Hamiltonian to take into account the valence Fock sector and the one containing a dynamical gluon, $|q\bar{q}\rangle$ and...
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Yingying Li (University of Science and Technology of China (USTC))
High energy physics is facing challenges of e.g., understanding the origin of observed baryon asymmetry, the nature of dark matter. Scenarios to address these challenges often involve dynamics that at present cannot be solved due to computational or theoretical limitations. An elegant solution exists in the form of real-time simulation, though hampered by limited quantum resources for the...
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José Manuel Alarcón (Universidad de Alcalá)
The charge and magnetization distribution inside the nucelon are properties of interest to learn about the electromagnetic structure of the ordinary matter. Using light-front dynamics, rooted on the Hamiltonian formulation, we can define unambiguously the distribution of charge and magnetization on the nucleon. These are called the transverse densities. In this talk I will show how using a new...
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Leonid Glozman (University of Graz)
We discuss the chiral spin symmetry of confinement in QCD and its implications for structure of hadrons as well as for hot QCD.
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Yang Li (University of Science and Technology of China (USTC))
The lightest meson, the pion, features two faces – one is the elementary Goldstone boson of QCD and the other is the structured bound state of quarks and gluons. To accommodate both in a single light-front wave function in the valence space, we obtain a sum rule by analyzing the conserved axial-vector current and the general structures of the wave functions. Using an analytic model motivated...
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Dr Jai More (Indian Institute of technology, Bombay)
In the present work, we have investigated the gravitational form factors (GFFs) for an electron and photon in the light-front QED model. We consider a physical electron dressed consisting of a bare electron and a photon. The gravitational form factors are obtained in the form of the overlap of light-front wave functions. The GFF D is attributed to information like pressure, shear, and energy...
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Chandan Mondal (Institute of Modern Physics, Chinese Academy of Sciences)
Basis light front quantization (BLFQ) is a nonperturbative approach, which has been developed for solving many-body bound state problems in quantum field theories. It is a Hamiltonian formalism incorporating the advantages of the light-front dynamics. In my talk, I will report our recent progress in applying BLFQ to reveal structure of hadrons, specifically the pion and the nucleon. We will...
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Prof. Paul Hoyer (University of Helsinki)
Hadrons are strongly bound, yet their spectra can be classified as for atoms (and molecules). The apparent dominance of the valence ($q\bar q$, $qqq$) components of QCD bound states is paradoxical: The strong gluon field would be expected to generate an abundance of quark and gluon constituents.
The atomic features of hadrons motivates a closer look at the bound state methods of QED. They...
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Guy F. de Teramond (Universidad de Costa Rica)
The Hamiltonian formalism is a particularly useful framework to describe hadron bound states in QCD while generating the Hilbert space in terms of their constituents. The quantum entropy of any bound state is zero, but when the proton components are probed, for example by deep inelastic scattering, the study of the entropy of entanglement between the components and the rest of the proton...
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Enrique Rico Ortega (UPV/EHU & Ikerbasque)
We will discuss three different aspects in the simulation of lattice gauge theories:
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(1) We will see how tensor network methods allow to have access to real-time dynamics in these systems.
(2) We will see how non-perturbative matrix elements (PDF, TMD,...), that are non local in both space and real-time and are essential to describe the scattering in particle physics, can be obtained from a... -
Prof. James.P. Vary ( Iowa State University (ISU))
Light Front quantization of a Hamiltonian derived from quantum field theory has a long history. The introduction of Basis Light Front Quantization (BLFQ) has led to the development of Hamiltonians and numerical methods for solving both relativistic bound state and scattering applications in QED and QCD. For QCD applications in limited Fock spaces, one assumes a form of confinement based on...
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Wayne Polyzou (University of Iowa)
I will discuss formally exact Hamiltonian representations of quantum field theories based on Daubechies wavelets. Daubechies wavelets are an orthonormal basis of compactly supported functions on the real line. They are generated from the fixed point of a renormalization group equation by translations and dyadic scale transformations.
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There are an infinite number of basis functions with... -
Meijian Li (University of Santiago de Compostela)
Following the formalism developed in our preceding works [1], a non-perturbative light-front Hamiltonian approach, we investigated the momentum broadening of a quark jet inside a SU(3) colored medium. We performed the numerical simulation of the real-time jet evolution in the Fock space of |q> + |qg>, at an extensive range of 𝑝+, and various medium densities. With the obtained light-front...
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Juan José Gálvez-Viruet (Universidad Complutense de Madrid)
In this ongoing work we show how the quantum numbers of a quark can be packed in nine logical qubits. For this, we are employing one phase for each of the three components of the spatial momentum. As opposed to a lattice calculation, momentum is thus represented in a continuum property of the qubit. The discretization of a hadron system then needs to be effected at the level of the particle number.
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Sudeep Saha (Indian Institute of Technology, Bombay)
We calculate the contribution to the gravitational form factors (GFFs) for the quark and gluon from the energy-momentum tensor using the light-front Hamiltonian QCD approach. Instead of a proton state, we consider a simple spin-$1/2$ composite state with a gluonic degree of freedom, namely a quark dressed with a gluon. Using the GFFs, we calculate the quark and gluon contributions to the...
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Dr Kamil Serafin (Institute of Modern Physics, Chinese Academy of Sciences)
I will present a plan for solving QCD. The first step requires calculating effective Hamiltonians using renormalization group procedure for effective particles (RGPEP). In the second step one diagonalizes the Hamiltonians using known methods (DLCQ, BLFQ, quantum computing, etc.). My confidence in the plan stems from the fact that both ultraviolet and small-x divergences are absent in the...
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Prof. Pedro Bicudo (CeFEMA, IST, Lisboa)
A metastable phase has important physical implications, since it may form vacuum bubbles detectable experimentally. It is well known that, due to spontaneous chiral symmetry breaking, there are two, or more, different QCD vacua. In the chiral limit, in the true vacuum, the pseudoscalar ground states are Goldstone bosons. The chiral invariant vacuum (at the top of the "Mexican hat") is an...
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Alessandro Roggero (University of Trento)
Quantum simulations on digital quantum devices have the promise of offering the possibility for non perturbative calculations of both static and dynamic properties of strongly coupled Lattice Field Theories. In order to deliver on this promise, large scale digital quantum calculations need to be protected using Quantum Error Correction (QEC). In this talk I will give a brief introduction to...
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Christopher Winterowd (Goethe University, Frankfurt)
Quantum simulations of lattice gauge theories are typically performed in the
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Hamiltonian formulation of the theory. We briefly discuss the two
state-of-the-art approaches for digital quantum simulations, quantum
annealing and universal gate-based quantum computing. While the quantum annealer acts as
a laboratory for toy models e.g. solving for the ground state or dynamics of small systems... -
Wenyang Qian (University of Santiago de Compostela)
In recent years, a lot of effort has been put into expanding established jet-quenching formalisms to account for higher-order or energy-suppressed medium-induced effects. Understanding how such contributions emerge is important to have a more complete picture of jet evolution in the medium and to extract more detailed properties of the underlying matter. However, such efforts are in general...
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Stanislaw Głazek (University of Warsaw)
Wilson et al. proposed in Phys. Rev. D 49, 6720, (1994) to deal with the QCD front form Hamiltonian divergences due to gluons with small hadron momentum fraction x, such as in the instantaneous gluon exchange between quarks, by introducing tree level counter terms. These small-x divergences and counter terms significantly complicate access to the logarithmically scale-dependent dynamics of...
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Thomas Cohen (University of Maryland)
Many aspects of QCD are currently inaccessible computationally due to sign problems. These can be evaded if sufficiently large reliable quantum computers are developed and these naturally use Hamiltonian formulations. A key problem in quantum computing is the need to prepare the state of interest. This talk will introduce the ideas behind the quantum zeon effect and the newly developed...
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Alexandre Salas-Bernárdez (Universidad Complutense de Madrid)
Traditional lore of meson decays suggested that the production of a quark-antiquark pair from the chromoelectric field would happen in a 3P0 state (a scalar state with aligned spins and a relative L=1 wave). This are not the quantum numbers of the tree-level interaction in QCD. Moreover, they are not produced at any order in perturbation theory because the theory is to a good approximation...
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Hugo Reinhardt (Institute for Theoretical Physics, Tuebingen University)
The effective potential of the Polyakov loop is investigated within the Hamiltonian approach to QCD in Coulomb gauge where finite temperature $T$ is introduced by compactifying one space direction. We briefly review this approach and extend earlier work in the Yang-Mills sector by including dynamical quarks. In a first approximation, we follow the usual practice in functional approaches and...
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Prof. Wolfgang Schweiger (University of Graz)
Among the three prominent forms of relativistic Hamiltonian dynamics introduced by Dirac, the point form is the least popular one. A very attractive feature of the point form is the clear separation of interaction-dependent and interaction-independent Poincare generators, as already noticed by Dirac. The interaction-dependent generators generate the subgroup of space-time translations, whereas...
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Henry S. Lamm (Fermilab)
Quantum computers open the possibility of efficiently simulating quantum field theories directly in Minkowski space through a Hamiltonian formulation. In order to take advantage of these new devices, a number of theoretical and algorithmic obstacles must be overcome. Resolving them in as resource effective way as possible could reduce the timescale for practical quantum advantage by decades....
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Zohreh Davoudi (University of Maryland, College Park)
Quantum computing lattice gauge theories of relevance to nature requires a range of theoretical and algorithmic developments to make simulations amenable to near- and far-term computing. With a focus on the SU(2) lattice gauge theory with matter, I will motivate the need for efficient theoretical formulations, introduce general quantum algorithms that can simulate them efficiently, and discuss...
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