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High Energy Physics - Lattice

New submissions

[ total of 7 entries: 1-7 ]
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New submissions for Tue, 20 Feb 18

[1]  arXiv:1802.06198 [pdf, other]
Title: Mass gap in the weak coupling limit of $(2+1)$ SU(2) lattice gauge theory
Comments: 9 pages, 4 figures
Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Theory (hep-th); Mathematical Physics (math-ph)

We develop the dual description of $2+1$ SU(2) lattice gauge theory as interacting `abelian like' electric loops by using Schwinger bosons. "Point splitting" of the lattice enables us to construct explicit Hilbert space for the gauge invariant theory which in turn makes dynamics more transparent. Using path integral representation in phase space, the interacting closed loop dynamics is analyzed in the weak coupling limit to get the mass gap.

Cross-lists for Tue, 20 Feb 18

[2]  arXiv:1802.06685 (cross-list from hep-ph) [pdf, other]
Title: A new class of compact stars: pion stars
Comments: 6 pages, 4 figures
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Astrophysical Phenomena (astro-ph.HE); High Energy Physics - Lattice (hep-lat); Nuclear Theory (nucl-th)

Compact stellar objects offer deep insight into the physics of elementary particles in dense environments through the imprint left by merger events on the electromagnetic and gravitational wave spectra. The theoretical description of compact star interiors requires full knowledge of the equation of state (EoS) of nuclear matter and involves the non-perturbative solution of quantum chromodynamics (QCD), the theory of strongly interacting quarks and gluons. However, first-principle methods (most notably, lattice QCD simulations) are not available for high neutron densities - consequently, the EoS of neutron stars necessarily relies on a modeling of the nuclear force. Here we propose a different scenario, where the neutron density vanishes and a Bose-Einstein condensate of charged pions (the lightest excitations in QCD) plays the central role instead. This setting can be approached by first-principle methods and leads to a new class of compact stars: pion stars. As we demonstrate, pion star matter exhibits gravitationally bound configurations and is metastable against electroweak decays. If pion stars indeed exist in our Universe, this result constitutes the first occasion that the EoS and the mass-radius relation of a compact stellar object is determined from first principles within the Standard Model.

[3]  arXiv:1802.06704 (cross-list from cond-mat.quant-gas) [pdf, other]
Title: Quantum simulation of lattice gauge theories using Wilson fermions
Comments: 19 pages, 11 figures
Subjects: Quantum Gases (cond-mat.quant-gas); High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph); Quantum Physics (quant-ph)

Quantum simulators have the exciting prospect of giving access to real-time dynamics of lattice gauge theories, in particular in regimes that are difficult to compute on classical computers. Future progress towards scalable quantum simulation of lattice gauge theories, however, hinges crucially on the efficient use of experimental resources. As we argue in this work, due to the fundamental non-uniqueness of discretizing the relativistic Dirac Hamiltonian, the lattice representation of gauge theories allows for an optimization that up to now has been left unexplored. We exemplify our discussion with lattice quantum electrodynamics in two-dimensional space-time, where we show that the formulation through Wilson fermions provides several advantages over the previously considered staggered fermions. Notably, it enables a strongly simplified optical lattice setup and it reduces the number of degrees of freedom required to simulate dynamical gauge fields. Exploiting the optimal representation, we propose an experiment based on a mixture of ultracold atoms trapped in a tilted optical lattice. Using numerical benchmark simulations, we demonstrate that a state-of-the-art quantum simulator may access the Schwinger mechanism and map out its non-perturbative onset.

Replacements for Tue, 20 Feb 18

[4]  arXiv:1712.02194 (replaced) [pdf, other]
Title: Plasmon mass scale in two dimensional classical nonequilibrium gauge theory
Comments: 12 pages, 14 figures, matches published version
Journal-ref: Phys. Rev. D 97 (2018), 034017
Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph)
[5]  arXiv:1708.00924 (replaced) [pdf, ps, other]
Title: Discrete Lorentz symmetry and discrete time translational symmetry
Authors: Pei Wang
Comments: 17 pages, 4 figures, the published version
Journal-ref: New J. Phys. 20, 023042 (2018)
Subjects: Statistical Mechanics (cond-mat.stat-mech); High Energy Physics - Lattice (hep-lat); Quantum Physics (quant-ph)
[6]  arXiv:1711.03388 (replaced) [pdf, other]
Title: Individual eigenvalue distributions of crossover chiral random matrices and low-energy constants of SU(2)$\times$U(1) lattice gauge theory
Comments: 28 pages in PTPTeX, 25 figures
Journal-ref: Prog. Theor. Exp. Phys. 2018, 023B01 (2018)
Subjects: High Energy Physics - Lattice (hep-lat); Disordered Systems and Neural Networks (cond-mat.dis-nn); High Energy Physics - Theory (hep-th)
[7]  arXiv:1712.04814 (replaced) [pdf, ps, other]
Title: Patterns of Symmetry Breaking in Chiral "QCD"
Comments: Latex 19 pages, 1 figure
Subjects: High Energy Physics - Theory (hep-th); High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph)
[ total of 7 entries: 1-7 ]
[ showing up to 2000 entries per page: fewer | more ]

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