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๐Ÿ” harry penketh ๐Ÿ“‚ Physics
Showing 11392 results for "harry penketh" in Physics
Physics Preprint PDF DOI

Defending Quantum Classifiers against Adversarial Perturbations through Quantum Autoencoders

Emma Andrews, Sahan Sanjaya, Prabhat Mishra ยท 2026

Machine learning models can learn from data samples to carry out various tasks efficiently. When data samples are adversarially manipulated, such as by insertion of carefully crafted noise, it can cauโ€ฆ

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The End of the First Act: Spectral Running, Interacting Dark Radiation, and the Hubble Tension in Light of ACT DR6 Data

Mathias Garny, Florian Niedermann, Martin S. Sloth ยท 2026

We point out that constraints on $\Delta N_\mathrm{eff}$ reported by the ACT collaboration in their DR6 data release are surprisingly sensitive to the assumptions made about the initial power spectrumโ€ฆ

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Galilean Reeh--Schlieder Obstruction

Leonardo A. Pachon ยท 2026

We prove that the standard Galilean Haag--Kastler axioms, augmented by Bargmann mass superselection, are inconsistent with the Reeh--Schlieder property: no such net admits a vacuum that is cyclic and โ€ฆ

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Physics Preprint PDF DOI

(Super-)renormalizable hairy meronic black holes

Luis Aviles, Borja Diez ยท 2026

We construct an analytical black hole solution in the Einstein-Maxwell-Yang-Mills theory with a conformally coupled scalar field in four dimensions, which generalizes the charged Mart\'inez-Troncoso-Zโ€ฆ

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Pseudo-Hermiticity of the Nakajima-Zwanzig Projected Liouvillian in the Jaynes-Cummings Model

Kejun Liu ยท 2026

The Nakajima-Zwanzig projected Liouvillian QLQ, the generator of the exact memory kernel in open quantum dynamics, is manifestly non-Hermitian yet has been reported to possess a purely real spectrum iโ€ฆ

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Polynomial Resource Classification of Quantum Circuit Familes via Classical Shadows

Andrew Maciejunes, Ross Gore, Sachin Shetty, Barry Ezell ยท 2026

We compare four polynomial-resource measurement strategies, (I) $Z$-basis-only, (II) nearest-neighbor $ZZ$ (NN), (III) multi-basis ($Z$, $X$, $Y$), and (IV) classical shadows, for classifying three quโ€ฆ

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Early-Time Nonlinear Growth in an Unstable Q-Ball Hairy Black Hole

Lang Cheng, Guangzhou Guo, Peng Wang, Haitang Yang ยท 2026

Early-time evolution away from an unstable equilibrium in a nonlinear system is often expected to be governed by the associated linear instability. Combining full nonlinear evolution with first- and sโ€ฆ

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Quantum-enhanced Network Tomography

Yufei Zheng, Zihao Gong, Saikat Guha, Don Towsley ยท 2026

Network tomography refers to the use of inference techniques for inferring internal network states from end-to-end probes. Quantum probes, implemented by sending blocks of $n$ coherent-state pulses auโ€ฆ

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Multi-tracers, multi-surveys: data-driven EFT prior calibration from the PFS--DESI overlap

Nhat-Minh Nguyen ยท 2026

Marginalizing over roughly 12 effective-field-theory (EFT) nuisance parameters per tracer per redshift bin is the dominant systematic cost in full-shape galaxy power spectrum analyses. Simulation-baseโ€ฆ

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Intermittency-Driven Turbulence Cascade Memory Extends the Markov-Einstein Coherence Length Beyond the Canonical Estimate

Y. Sungtaek Ju ยท 2026

Using direct numerical simulation of forced isotropic turbulence at $\text{Re}_\lambda \approx 1300$ and $\approx 433$, together with two independent Markov-by-construction null surrogates, we measureโ€ฆ

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Alfven-winged pulsar

Maxim Lyutikov (Purdue University) ยท 2026

Detecting possible electromagnetic precursors to the gravitational signal from merging compact objects is challenging, but it can reveal intricate physical properties of the merging stars through theiโ€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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Spin Seebeck Effect in Normal-Metal--Chiral-Insulator Heterostructure

Jiayan Zhang, Gaoyang Li, Gaomin Tang, Yanxia Xing ยท 2026

Phonons can carry angular momentum and exhibit chirality through the circular polarization of atomic motion. This enables a phonon-mediated spin Seebeck effect (SSE) via the conversion of phonon angulโ€ฆ

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It\^o tracers: continuous-trajectory Lagrangian particles for Eulerian hydrodynamics

Eric R. Moseley, R. Teyssier, Tom Abel ยท 2026

Lagrangian tracer particles have long been used to track the history of individual gas parcels in hydrodynamical codes. Particles advected by the cell-centered velocity carry no representation of undeโ€ฆ

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Classifying magnons in itinerant ferromagnets from linear response TDDFT: Fe, Ni and Co revisited

Thorbj{o}rn Skovhus, Thomas Olsen ยท 2026

The magnetic excitation spectrum of itinerant magnets exhibits rich and complex spectral features that often complicate interpretation of the underlying physics. For perturbations in the long wavelengโ€ฆ

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On a quantization of deformed reducible gauge theories

A. A. Averianov, A. O. Barvinsky, I. L. Buchbinder, V. A. Krykhtin, D. V. Nesterov ยท 2026

We consider a general reducible gauge theory deformed by mass or/and interaction terms violating gauge invariance. It is shown that in the Abelian case, by using the Stueckelberg-type procedure, this โ€ฆ

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Formalizing Galaxy Population Evolution: Drift and Mergers as Transport Processes on Manifolds

Tsutomu T. Takeuchi (Nagoya University, Institute of Statistical Mathematics) ยท 2026

Galaxy evolution is commonly described through the time evolution of observational statistics such as luminosity functions and stellar mass functions. However, these quantities are projections of an uโ€ฆ

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Backlighting the Cosmic Web with Fast Radio Bursts: An Anthology of Dispersion Measure Cross-Correlations with Large-Scale Structure and Baryon Tracers

Kritti Sharma, Elisabeth Krause, Vikram Ravi, Dhayaa Anbajagane, Liam Connor, W.L. Kimmy Wu, Simone Ferraro, Sebastian Grandis, David Alonso, Yi-Kuan Chiang, Casey J. Law, Pranjal R. S., Samuel McCarty, Shivam Pandey ยท 2026

Fast Radio Bursts (FRBs) probe baryons permeating the cosmic web through their dispersion measures (DMs), which encode the integrated electron density along cosmological sightlines. Using 3,455 uniqueโ€ฆ

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CCAT: Silicon-Platelet Feedhorns for Submillimeter Wavelengths

Jason Austermann, James Beall, James R. Burgoyne, Scott Chapman, Steve Choi, Cody J. Duell, Anthony I. Huber, Johannes Hubmayr, Matthew A. Koc, Michael D. Niemack, Joel N. Ullom, Jeffrey van Lanen, Anna Vaskuri, Michael Vissers, Jordan Wheeler ยท 2026

Silicon-platelet feedhorn arrays are an established technology at millimeter wavelengths that, for some applications, can provide significant advantages over traditional direct-machined metal feedhornโ€ฆ

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Orbital angular momentum radiation and polarization of relativistic electrons in magnetic fields

Ziqiang Huang, Qi Meng, Xuan Liu, Wei Ma, Zhen Yang, Liang Lu, Alexander J. Silenko, Pengming Zhang, Liping Zou ยท 2026

While spin polarization from synchrotron radiation is well established, the polarization of orbital angular momentum (OAM) in such radiative processes remains elusive. We study radiation and polarizatโ€ฆ

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