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๐Ÿ” david callan ๐Ÿ“‚ Physics
Showing 1954 results for "david callan" in Physics
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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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Cartan Fluxes in $SU(3)$ Lattice Gauge Theory

Tereza Mendes, Luis E. Oxman, Gustavo M. Simoes, Rafael C.S. Tonhon ยท 2026

We propose and analyze a new method of detecting center vortices and monopoles in lattice Yang-Mills theory. This procedure is sensitive to the intrinsic degeneracy of the center charges, which play aโ€ฆ

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Meshless $h$-adaptive Solution for non-Newtonian Natural Convection in a Differentially Heated Cavity

Miha Rot, Gregor Kosec ยท 2026

One of the main challenges in numerically solving partial differential equations is finding a discretisation for the computational domain that balances the accurate representation of the underlying fiโ€ฆ

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Position-Dependent Calibration and Frequency Stability in On-Axis Optical Transduction of Vertical InP Nanowire Resonators

Robert G. West, Kostas Kanellopulos, Lukas Hrachowina, Magnus Borgstrom, Silvan Schmid ยท 2026

We present a quantitative framework for on-axis optical transduction of vertical InP nanowire resonators, correlating laser position to signal amplitude, calibration, and frequency stability. Phototheโ€ฆ

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Rotating Thin Shells in Einstein-Gauss-Bonnet Gravity

Joao D. Alvares, Tiago V. Fernandes ยท 2026

A rotating metric solution in Einstein-Gauss-Bonnet gravity with a negative cosmological constant was recently found in the Chern-Simons point. We construct a rotating thin shell gluing two spacetimesโ€ฆ

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William A. Bardeen -- A Brief Biography

Christopher T. Hill ยท 2026

William Allan Bardeen (September 15, 1941 $-$ November 18, 2025) was an American theoretical physicist who worked at the Fermi National Accelerator Laboratory. He is renowned for his foundational workโ€ฆ

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Quantum Fluctuations and Newton-Cartan Geometry for Non-Relativistic de Sitter space

Matthias Harksen, Diego Hidalgo, Watse Sybesma ยท 2026

We study a non-relativistic realisation of two-dimensional de Sitter gravity both from its boundary and bulk description with the goal of learning about de Sitter space and paving the way for extendinโ€ฆ

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Large Interstellar Polarisation Survey. III. Observational constraints on the structure of grains

Ralf Siebenmorgen, Stefano Bagnulo, Lapo Fanciullo, Thomas Vannieuwenhuyse, Vincent Guillet ยท 2026

Dust in the diffuse interstellar medium remains incompletely understood with regard to the structure, composition, size distribution, and alignment properties of the grains. Joint observations of reddโ€ฆ

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Cartan connections for an infinite family of integrable vortices

Sven Bjarke Gudnason, Calum Ross ยท 2026

An infinite family of integrable vortex equations is studied and related to the Cartan geometry of the underlying Riemann surfaces. This Cartan picture gives an interpretation of the vortex equations โ€ฆ

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Moir\'e Mott correlated mosaics in twisted bilayer 1T-TaS$_2$

Ana Vera Montoto, Jose L. Lado, Adolfo O. Fumega ยท 2026

The tunability and twist engineering of van der Waals materials enable the emergence of electronic states not present in individual monolayers. Among them, monolayer 1T-TaS$_2$ is a well-known Mott inโ€ฆ

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Portable laser-cooled ytterbium beam clock based on an ultra-narrow optical transition

R. F. Offer, E. Klantsataya, A. P. Hilton, A. Strathearn, N. Bourbeau Hebert, C. J. Billington, S. Watzdorf, S. K. Scholten, B. White, M. Nelligan, T. M. Stace, A. N. Luiten ยท 2026

The highest performance atomic clocks are based on interrogation of ultra-narrow optical transitions. There is now significant interest in developing these systems as a source of GNSS-independent timeโ€ฆ

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An Introduction to String Newton-Cartan Holography and Integrability

Andrea Fontanella, Juan Miguel Nieto Garcia ยท 2026

String Newton-Cartan holography is a new example of gauge/gravity duality relating non-relativistic string theory and gauge theories. We review how to construct a family of string and $p$-brane Newtonโ€ฆ

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Formation and Decay of Oscillons in Einstein-Cartan Higgs Inflation

Javier Rubio ยท 2026

We review recent progress in the understanding of the preheating stage of Higgs inflation formulated within the Einstein-Cartan framework of gravity. This setup smoothly interpolates between the metriโ€ฆ

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Unveiling an Hourglass-Shaped Magnetic Field toward IRDC G351.77-0.53

O. R. Jadhav, L. K. Dewangan, I. I. Zinchenko, Thushara G. S. Pillai, Patricio Sanhueza, A. K. Maity, Ram K. Yadav, Saurabh Sharma ยท 2026

We present the SOFIA/HAWC+ 214 $\mu$m polarimetric observations toward the infrared dark cloud G351.77-0.53 (hereafter G351), complemented by existing multi-wavelength data sets. Infrared excess from โ€ฆ

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Quark and Lepton Masses, Baryon Asymmetry, and Neutrino Mass from a Supersymmetric Preon Model

Risto Raitio ยท 2026

The flavor problem and the baryon asymmetry of the universe (BAU) are addressed simultaneously within a supersymmetric preon model. Standard Model fermions are three-body composites of preons confinedโ€ฆ

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Discovery of a hybridization-wave electronic order in a van der Waals Kondo lattice

Lu Cao, Jiefei Shi, Lanxin Liu, Xuan Luo, Yu-Ping Sun, Yi-feng Yang, Yugui Yao, Jinhai Mao, Yuhang Jiang ยท 2026

Kondo lattice systems, in which localized magnetic moments coherently hybridize with itinerant electrons, exhibit a rich landscape of emergent quantum phenomena. Within this framework, the hybridizatiโ€ฆ

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Features of Spacetime-Symmetry Breaking and the Standard-Model Extension in Riemann-Cartan Geometry

Robert Bluhm ยท 2026

For over two decades, the gravity sector of the Standard-Model Extension (SME) has served as a phenomenological framework for testing spacetime symmetry breaking in the presence of gravity. During thiโ€ฆ

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B-fields And dust in interstelLar fiLAments using Dust POLarization (BALLAD-POL): VI. Grain alignment mechanisms in the massive quiescent filament G16.96+0.27 using dust polarization observations from JCMT/POL-2

Saikhom Pravash, Thiem Hoang, Archana Soam, Qi-Lao Gu, Tie Liu, Pham Ngoc Diep, Le Ngoc Tram, Nguyen Bich Ngoc ยท 2026

Dust polarization induced by aligned non-spherical grains acts as an important tool to trace the magnetic field (B-field) morphologies and strengths in molecular clouds and constrain grain properties โ€ฆ

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No Quantum Utility from Hadron Masses? No, Quantum Utility from Hadron Masses!

Henry Lamm ยท 2026

Is there a quantum utility in establishing the masses of hadrons? Here we show that the best response is that of Farr\'es, Cap\'o, and Davis: perhaps, perhaps, perhaps. This is interesting given the gโ€ฆ

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Versatile CMOS modulation-free self-isolating stabilized precision lasers on a chip

David A. S. Heim, Kaikai Liu, Rahul Chawlani, Karl. D. Nelson, Daniel J. Blumenthal ยท 2026

Ultra-low-noise stabilized lasers are a fundamental tool for precision quantum technologies, optical clocks, microwave and millimeter-wave generation, and fiber sensing. Existing systems rely on tableโ€ฆ

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