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Jet Definition and Transverse-Momentum-Dependent Factorization in Semi-inclusive Deep-Inelastic Scattering.
Phys Rev Lett
February 2025
Lawrence Berkeley National Laboratory, Nuclear Science Division, Berkeley, California 94720, USA.
Using the color dipole picture of deep inelastic scattering (DIS) and the color glass condensate effective theory, we study semi-inclusive jet production in DIS at small x in the limit where the photon virtuality Q^{2} is much larger than the transverse momentum squared P_{⊥}^{2} of the produced jet. In this limit, the cross section is dominated by aligned jet configurations, that is, quark-antiquark pairs in which one of the fermions-the would-be struck quark in the Breit frame-carries most of the longitudinal momentum of the virtual photon. We show that physically meaningful jet definitions in DIS are such that the effective axis of the jet sourced by the struck quark is controlled by its virtuality rather than by its transverse momentum.
View Article and Find Full Text PDFUnconventional magnetic oscillations in a kagome Mott insulator.
Proc Natl Acad Sci U S A
February 2025
Department of Physics, University of Michigan, Ann Arbor, MI 48109.
In metals, electrons in a magnetic field undergo cyclotron motion, leading to oscillations in physical properties called quantum oscillations. This phenomenon has never been seen in a robust insulator because there are no mobile electrons. We report an exception to this rule.
View Article and Find Full Text PDFDetecting Multipartite Entanglement Patterns Using Single-Particle Green's Functions.
Phys Rev Lett
December 2024
Brookhaven National Laboratory, Condensed Matter Physics and Materials Science Division, Upton, New York 11973, USA.
We present a protocol for detecting multipartite entanglement in itinerant many-body electronic systems using single-particle Green's functions. To achieve this, we first establish a connection between the quantum Fisher information and single-particle Green's functions by constructing a set of witness operators built out of single electron creation and destruction operators in a doubled system. This set of witness operators is indexed by a momentum k.
View Article and Find Full Text PDFStatistical Mechanics of Directed Networks.
Entropy (Basel)
January 2025
Department of Condensed Matter Physics, University of Barcelona, Martí i Franquès 1, E-08028 Barcelona, Spain.
Directed networks are essential for representing complex systems, capturing the asymmetry of interactions in fields such as neuroscience, transportation, and social networks. Directionality reveals how influence, information, or resources flow within a network, fundamentally shaping the behavior of dynamical processes and distinguishing directed networks from their undirected counterparts. Robust null models are crucial for identifying meaningful patterns in these representations, yet designing models that preserve key features remains a significant challenge.
View Article and Find Full Text PDFInformation Theoretical Analysis of Quantum Mixedness in a Finite Model of Interacting Fermions.
Entropy (Basel)
January 2025
CeBio-Departamento de Ciencias Básicas, Universidad Nacional del Noroeste Provincia de Buenos Aires (UNNOBA), CONICET, Junin 6000, Argentina.
In this study, we utilize information theory tools to investigate notable features of the quantum degree of mixedness (Cf) in a finite model of interacting fermions. This model serves as a simplified proxy for an atomic nucleus, capturing its essential features in a more manageable form compared to a realistic nuclear model, which would require the diagonalization of matrices with millions of elements, making the extraction of qualitative features a significant challenge. Specifically, we aim to correlate Cf with particle number fluctuations and temperature, using the paradigmatic Lipkin model.
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