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๐Ÿ” nathan lemons ๐Ÿ“‚ Physics
Showing 10755 results for "nathan lemons" in Physics
Physics Preprint PDF DOI

Q3SAT-GPT: A Generative Model for Discovering Quantum Circuits for the 3-SAT Problem

Pratim Ugale, Ilya Tyagin, Karunya Shirali, Kien X. Nguyen, Ilya Safro ยท 2026

This work introduces Q3SAT-GPT, a generative model for discovering quantum circuits for the Max-E3-SAT problem. Our method learns from high-performing QAOA-style ans\"atze to directly generate candidaโ€ฆ

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Physics Preprint PDF DOI

TwinSpecNet: Extending APOGEE's chemical reach to low-S/N spectra via empirical paired learning

Weijia Sun, Cristina Chiappini, Samir Nepal ยท 2026

Large spectroscopic surveys rely on automated pipelines to deliver homogeneous stellar labels, but a substantial fraction of observations are at low signal-to-noise ratio (S/N), where label estimates โ€ฆ

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Physics Preprint PDF DOI

Integrable Deformations of the Breitenlohner-Maison Model from 4d Chern-Simons Theory

Meer Ashwinkumar, Matthias Blau ยท 2026

We derive integrable deformations of the 2d Breitenlohner-Maison (BM) sigma model that describes the stationary, axisymmetric sector of 4d general relativity, as well as higher-rank generalisations thโ€ฆ

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Physics Preprint PDF DOI

Semileptonic $B_q$ decays to heavy tensor mesons

Pietro Colangelo, Fulvia De Fazio, Carlo la Torre, Giuseppe Roselli ยท 2026

The semileptonic decays of $B_q$ mesons ($q=u,d,s$) to $J^P=2^+$ charmed mesons are investigated. The form factors parametrising the hadronic matrix elements of the weak vector and axial-vector quark โ€ฆ

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Physics Preprint PDF DOI

Explainable AI for Jet Tagging: A Comparative Study of GNNExplainer, GNNShap, and GradCAM for Jet Tagging in the Lund Jet Plane

Pahal D. Patel, Sanmay Ganguly ยท 2026

Graph neural networks such as ParticleNet and transformer based networks on point clouds such as ParticleTransformer achieve state-of-the-art performance on jet tagging benchmarks at the Large Hadron โ€ฆ

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Physics Preprint PDF DOI

Learning Neural Operator Surrogates for the Black Hole Accretion Code

Matthias Nagele, Cedric Bos, Chester Tan, Christian M. Fromm, Ingo Scholtes, Karl Mannheim ยท 2026

General-relativistic magnetohydrodynamic (GR-MHD) simulations are essential for studying black hole accretion, relativistic jets, and magnetic reconnection, yet their computational cost severely limitโ€ฆ

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Physics Preprint PDF DOI

Lessons from binary dynamics of inspiralling equal-mass boson-star mergers

Tamara Evstafyeva, Antonia Seifert, Ulrich Sperhake, Christopher J. Moore, Tamanna Jain ยท 2026

We explore the gravitational-wave phenomenology of equal-mass inspiralling boson-star binaries using numerical relativity simulations. In particular, we characterise the waveform differences between bโ€ฆ

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Physics Preprint PDF DOI

Graph-Conditioned Meta-Optimizer for QAOA Parameter Generation on Multiple Problem Classes

Kien X. Nguyen, Ilya Safro ยท 2026

We study parameter transferability for the Quantum Approximate Optimization Algorithm (QAOA) across multiple combinatorial optimization problem classes from a parameter generation perspective. Specifiโ€ฆ

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Conditional Flow Matching for Probabilistic Downscaling of Maximum 3-day Snowfall in Alaska

Douglas Brinkerhoff, Elizabeth Fischer ยท 2026

Precipitation in complex terrain is governed by orographic processes operating at scales of a few kilometers, yet climate models typically run at resolutions of 50--100~km where this topographic detaiโ€ฆ

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A Physics Informed Bayesian Neural Network for the Neutron Star Equation of State

J.D. Baker, C.A. Bertulani, R.V. Lobato ยท 2026

We present a physics-informed Bayesian neural-network framework to infer neutron-star equations of state from theoretical priors and to propagate the associated uncertainties to stellar observables. Tโ€ฆ

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Physics Preprint PDF DOI

Data-Driven Hamiltonian Reduction for Superconducting Qubits via Meta-Learning

Arielle Sanford, Andrew T. Kamen, Frederic T. Chong, Andy J. Goldschmidt ยท 2026

We introduce HAML (Hamiltonian Adaptation via Meta-Learning), a framework for fast online adaptation of effective Hamiltonian models of superconducting quantum processors. HAML proceeds in two phases.โ€ฆ

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Non-Relativistic Chern-Simons Supergravity with Torsion

Francisco Barriga, Patrick Concha, Nelson Merino, Evelyn Rodriguez ยท 2026

In this work, we construct a three-dimensional non-relativistic Chern--Simons supergravity theory with both curvature and torsion within the Mielke--Baekler framework. We show that a consistent non-reโ€ฆ

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Nucleon decays into one lepton plus two non-strange mesons

Wei-Qi Fan, Yi Liao, Xiao-Dong Ma ยท 2026

Nucleon decays into a lepton and two pseudoscalar mesons represent key channels for probing baryon number violation, complementing conventional two-body modes. In this Letter, we model-independently cโ€ฆ

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Mass spectra of charged mesons and the quenching of vector meson condensation via exact phase-space diagonalization

Jingyi Chao, Kun Xu ยท 2026

We investigate the dynamics and mass spectra of charged pseudoscalar ($\pi^+$) and vector ($\rho^+$) mesons in a background magnetic field at finite temperature using the two-flavor Nambu-Jona--Lasiniโ€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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Amplitude-Based Analysis of QED Radiative Corrections to Electroproduction of $\eta$-Mesons on Protons

Isabella Illari, Andrei Afanasev, William J. Briscoe, Victor L. Kashevarov, Axel Schmidt, Igor I. Strakovsky ยท 2026

A formalism for radiative correction calculations in exclusive $\eta$ electroproduction on the proton is presented, extending the treatment developed for the pion channel. The EXCLURAD code is used inโ€ฆ

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The Simons Observatory: Improved Cryogenic Struts for use in the Large Aperture Telescope Receiver

John Orlowski-Scherer, Anna Kofman, Tanay Bhandarkar, Mark Devlin, Saianeesh K. Haridas, Jeff Iuliano, Alex Manduca, Robert J. Thornton ยท 2026

The Simons Observatory Large Aperture Telescope Receiver (SO LATR) is a next generation Cosmic Microwave Background camera equipped with > 60, 000 detectors operating at 100 mK. Maintaining these deteโ€ฆ

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Twisted traces and quantization of moduli stacks of 3d $\mathcal{N}=4$ Chern-Simons-matter theories

Leonardo Santilli ยท 2026

We conjecture, and show in a plethora of examples, that the sphere partition function of 3d $\mathcal{N}=4$ Chern-Simons-matter theories equals a sum of twisted traces on tensor products of Verma moduโ€ฆ

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AI models of unstable flow exhibit hallucination

Ramdhan Wibawa, Birendra Jha ยท 2026

We report the first systematic evidence of hallucination in AI models of fluid dynamics, demonstrated in the canonical problem of hydrodynamically unstable transport known as viscous fingering. AI-basโ€ฆ

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Reinforcement Learning for Robust Calibration of Multi-Qudit Quantum Gates

Amine Jaouadi, Sahel Ashhab ยท 2026

Higher-dimensional quantum systems, such as qudits, offer architectural and algorithmic advantages over qubits, but their increased spectral crowding and limited controllability render high-fidelity qโ€ฆ

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