Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Shir, Ruth"'
Publikováno v:
Phys. Rev. B 109, L140201 (2024)
Strong local disorder in interacting quantum spin chains can turn delocalized eigenmodes into localized eigenstates, giving rise to many-body localized (MBL) phases. This is accompanied by distinct spectral statistics: chaotic for the delocalized pha
Externí odkaz:
http://arxiv.org/abs/2311.16229
Correlations between the eigenenergies of a system's spectrum can be a defining feature of quantum chaos. We characterize correlations between energies for all spectral distances by studying the distributions of $k$-th neighbor level spacings ($k$nLS
Externí odkaz:
http://arxiv.org/abs/2311.09292
Understanding the mechanisms underlying many-body quantum chaos is one of the big challenges in theoretical physics. We tackle this problem by considering a set of perturbed quadratic Sachdev-Ye-Kitaev (SYK) Hamiltonians defined on graphs. This allow
Externí odkaz:
http://arxiv.org/abs/2302.00917
The Symmetries of Feynman Integrals (SFI) method is extended for the first time to incorporate an irreducible numerator. This is done in the context of the so-called vacuum and propagator seagull diagrams, which have 3 and 2 loops, respectively, and
Externí odkaz:
http://arxiv.org/abs/2009.04947
Autor:
Kol, Barak, Shir, Ruth
We study a two loop diagram of propagator type with general parameters through the Symmetries of Feynman Integrals (SFI) method. We present the SFI group and equation system, the group invariant in parameter space and a general representation as a li
Externí odkaz:
http://arxiv.org/abs/1809.05040
Publikováno v:
Phys. Rev. D 96, 125013 (2017)
We study a 3-loop 5-propagator Feynman Integral, which we call the vacuum seagull, with arbitrary masses and spacetime dimension using the Symmetries of Feynman Integrals method. It is our first example with potential numerators. We determine the ass
Externí odkaz:
http://arxiv.org/abs/1704.02187
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Autor:
Kol, Barak, Shir, Ruth
Recently the space of tree level color structures for gluon scattering was determined in arXiv:1403.6837 together with its transformation properties under permutations. Here we generalize the discussion to loops, demonstrating a reduction of an arbit
Externí odkaz:
http://arxiv.org/abs/1406.1504
Autor:
Kol, Barak, Shir, Ruth
The group $S_4$ of permutations on four elements has an irreducible representation corresponding to the partition 4=2+2. This representation appears in several different mathematical contexts: the Jacobi identity of Lie algebras; the Schouten identit
Externí odkaz:
http://arxiv.org/abs/1404.1064
Autor:
Kol, Barak, Shir, Ruth
Color structures for tree level scattering amplitudes in gauge theory are studied in order to determine the symmetry properties of the color-ordered sub-amplitudes. We mathematically formulate the space of color structures together with the action of
Externí odkaz:
http://arxiv.org/abs/1403.6837