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Showing 9363 results for "nathan klein" in Physics
Physics Preprint PDF DOI

Hamilton--Jacobi theory for non-conservative field theories in the $k$-contact framework

Javier de Lucas, Julia Lange, Xavier Rivas, Cristina Sardon ยท 2026

This article develops a Hamilton--Jacobi theory for non-conservative classical field theories, with particular emphasis on dissipative systems, in the framework of co-oriented k-contact geometry. We iโ€ฆ

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Perturbative Coulomb branches on $\mathbb{R}^3\times S^1$: the global D-term potential

Arash Arabi Ardehali, Daniel J. Resnick ยท 2026

We find the perturbative potential on the 3d $\mathcal{N}\!=\!2$ Coulomb branch arising from a chiral 4d $\mathcal{N}\!=\!1$ gauge theory on $\mathbb{R}^3 \times S^1$, zeta-regularizing the D-term couโ€ฆ

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Newton-Cartan limit of Klein-Gordon AQFT and the collapse of Galilean modular structure

Leonardo A. Pachon ยท 2026

We extend the established Galilean/relativistic structural divider in algebraic quantum field theory, namely, the absence of Reeh-Schlieder and of Tomita-Takesaki modular flow on local algebras of anyโ€ฆ

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Curvature-Assisted Dynamical Compactification in a Pre-Inflationary Higher-Dimensional Universe

Yusuke Yamada ยท 2026

We investigate a pre-inflationary dynamical compactification scenario in which a higher-dimensional expanding universe evolves into an effectively four-dimensional one through curvature-assisted modulโ€ฆ

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Symmetry-Guided Design of Quantum Couplers in Dirac materials: AA-Bilayer Graphene Coupler

Petr Cervenka, Vit Jakubsky ยท 2026

We develop a theoretical framework for designing quantum couplers based on Dirac materials that can modulate the polarization of transmitted quasiparticles without significantly perturbing their propaโ€ฆ

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The open-Universe signal: A model artifact rather than genuine curvature

Peng-Ju Wu ยท 2026

Recent late-Universe observations suggest an open Universe. If confirmed, such a departure from spatial flatness would carry profound implications for our understanding of cosmic inflation and the ultโ€ฆ

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Principles of relativistic quantum statistical thermodynamics: a class of exactly solvable models

A. Yu. Zakharov ยท 2026

A system of interacting atoms is represented as an union of two subsystems, one of which is the system of atoms, and the other is an auxiliary scalar covariant field, which is equivalent to a given stโ€ฆ

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Analytical Treatment of Noise-Suppressed Klein Tunneling in Graphene with Possible Implications for Quantum-Dot Qubits

Kamal Azaidaoui, Ahmed Jellal, Hocine Bahlouli, A. Al Luhaibi, Michael Vogl ยท 2026

We study quantum tunneling through a potential barrier whose height fluctuates in time and is modeled by Gaussian white noise. We map the stochastic dynamics onto an equivalent time-independent Lindblโ€ฆ

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A Physicist's Visit to Exotic Spheres

Tancredi Schettini Gherardini ยท 2026

This thesis discusses exotic 7-spheres, i.e. manifolds that are homeomorphic but not diffeomorphic to the ordinary 7-sphere, using a set of analytical and computational tools from theoretical physics.โ€ฆ

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Composite quantum gates simultaneously compensated for multiple errors

Hristo G. Tonchev, Nikolay V. Vitanov ยท 2026

Systematic control errors remain a primary obstacle to realizing high-fidelity single-qubit gates. We introduce composite pulse sequences that implement X and Hadamard gates while simultaneously compeโ€ฆ

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Disentangling new physics with quantum entanglement in $t\bar{t}$ production at future lepton colliders

Masato Arai, Kentarou Mawatari, Nobuchika Okada ยท 2026

We investigate quantum entanglement and Bell-inequality violation in top-antitop pair production at future lepton colliders such as the International Linear Collider (ILC) and multi-TeV muon collidersโ€ฆ

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Gravitational Collapse of a Chiellini Integrable Scalar Field

Mohamed Aarif A, Soumya Chakrabarti ยท 2026

We study the gravitational collapse of a non-interacting mix of perfect fluid and a spatially homogeneous scalar field within a Chiellini-integrable framework. We choose an extended Higgs-type self-inโ€ฆ

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Landauer-based study of transport in Chern insulator heterostructures

J. Luna-Ramos, A. Martin-Ruiz ยท 2026

We study charge transport through a trivial-topological-trivial junction described by the continuous Qi-Wu-Zhang model, which realizes a two-dimensional Chern-insulating phase. The central region is tโ€ฆ

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Greybody Factor, Resonant Frequencies, and Entropy Quantization of Charged Scalar Fields in the Kerr-EMDA Black Hole

Naz{i}m Sertkan, Izzet Sakall{i} ยท 2026

We study charged massive scalar field perturbations on the rotating black hole (BH) background of Einstein-Maxwell-Dilaton-Axion (EMDA) theory, known as the Kerr-EMDA BH. Starting from the gauge-covarโ€ฆ

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Gauge-invariant off-shell formulations for 3D massive higher-spin supermultiplets

Evgeny I. Buchbinder, Arcadia J. Fegebank, Sergei M. Kuzenko ยท 2026

Making use of the known off-shell formulations for massless higher-spin ${\cal N}=1$ supermultiplets in four dimensions, gauge-invariant off-shell actions for massive higher-spin ${\cal N}=2$ supermulโ€ฆ

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Rather than drafting, vortex capture dictates efficiency in three-hydrofoil schools

Pedro C. Ormonde, Yuanhang Zhu, Daniel Quinn, Keith W Moored ยท 2026

Three-dimensional experiments are presented on a school of three pitching hydrofoils. Two side-by-side leader foils maintain the same relative positions while the location of a third follower foil is โ€ฆ

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Mapping Tachyon effective field theory to a subsector of Klein-Gordon theory

P. V. Athira, Ashik H, Priyadarshi Paul ยท 2026

On an unstable D-brane, the rolling of the tachyon away from the maximum of its potential is described by time-dependent solutions in string theory. Subsequent analysis leads to an understanding of phโ€ฆ

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Quantum-Deformed Phase-Space Geometry and Emergent Inflation in Effective Four-Dimensional Spacetime

Swapnil Kumar Singh (BMS Bangalore), Saleh O. Allehabi (Islamic U. of Madinah), Azzah A. Alshehri (Egyptian Ctr. Theor. Phys., Cairo, Hafr El Batin U., Hafr El Batin), Mahmoud Nasar (Egyptian Ctr. Theor. Phys., Cairo, Benha U.), Abdel Nasser Tawfik (Islamic U., Madinah, Ahram Canadian U., Giza, Egyptian Ctr. Theor. Phys.) ยท 2026

A phase-space approach to quantum-deformed gravity is developed. Following its reduction to an effective four-dimensional spacetime structure, we utilize it in reanalyzing the cosmic inflationary dynaโ€ฆ

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Batalin-Vilkovisky quantization with an angular twist

Djordje Bogdanovic, Marija Dimitrijevic Ciric, Richard J. Szabo ยท 2026

We construct cubic scalar field theory on $\lambda$-Minkowski space by combining the Batalin-Vilkovisky formalism with harmonic analysis, and produce two inequivalent noncommutative quantum field theoโ€ฆ

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Hydrodynamic Analog of the Klein Paradox: Vacuum Instability and Pair Production in a Linear Elastic Medium

Alan F. Tinoco ยท 2026

The Klein Paradox -- the anomalous scattering of relativistic fermions off a high potential step -- signals the limit of the single-particle interpretation of the Dirac equation. While Quantum Field Tโ€ฆ

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