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๐Ÿ” alec jacobson ๐Ÿ“‚ Physics
Showing 1630 results for "alec jacobson" in Physics
Physics Preprint PDF DOI

Computation of frequency- and time-domain Jacobians in optical tomography with Monte Carlo simulations

Pauliina Hirvi, Jaakko Olkkonen, Qianqian Fang, Ilkka Nissila ยท 2026

Significance: Jacobians, or spatially resolved sensitivity profiles, are central to image reconstruction in model-based optical tomography of biological tissue. Although Monte Carlo (MC) simulations aโ€ฆ

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Geodesically Complete Curvature-Bounce Inflation

Damien A. Easson ยท 2026

The early universe need not be described by an incomplete inflationary phase connected to a separate, more exotic prehistory. Recent results show that, within non-static FRW cosmology, only positive sโ€ฆ

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Unraveling the symmetry of Al5C3N

Vitalii Shtender, Chin Shen Ong, Pedro Berastegui, Olivier Donzel-Gargand, Johan Cedervall, Charles Hervoches, Premek Beran, Olle Eriksson, Ulf Jansson ยท 2026

The high-temperature ceramic compound Al5C3N with promising application usage belongs to the scarcely studied Al-C-N system. It was originally reported as an ordered compound in the non-centrosymmetriโ€ฆ

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Numerical Investigation of Elastically-Mounted tandem Cylinders using an ALE Runge-Kutta Discontinuous Galerkin method

Alexios Papadimitriou, Spyridon Zafeiris, George Papadakis ยท 2026

This work presents a high-order Arbitrary-Lagrangian-Eulerian (ALE) Discontinuous Galerkin framework for simulating multi-body Vortex-Induced Vibrations. The ALE formulation extends a Runge-Kutta Inteโ€ฆ

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Physics Preprint PDF DOI

Navigating Order-(Dis)Order Family Trees via Group-Subgroup Transitions

Shuya Yamazaki, Yuyao Huang, Martin Hoffmann Petersen, Wei Nong, Kedar Hippalgaonkar ยท 2026

As closed-loop materials discovery systems scale to produce millions of candidate compounds, the credibility of the novelty they reward becomes a critical concern. Novelty is commonly assessed againstโ€ฆ

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A neural operator framework for data-driven discovery of stability and receptivity in physical systems

Chengyun Wang, Liwei Chen, Nils Thuerey ยท 2026

Understanding how complex systems respond to perturbations, such as whether they will remain stable or what their most sensitive patterns are, is a fundamental challenge across science and engineeringโ€ฆ

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Van der Waals Gravity Theory

H. R. Fazlollahi ยท 2026

In this study, we propose an extension of general relativity inspired by the van der Waals equation of state, incorporating non-ideal thermodynamic effects into the gravitational sector. Our approach โ€ฆ

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Emergent nonreciprocity in open thermodynamically-consistent chemical reaction networks

Daniel Evans, Yizhi Shen, Ahmad K. Omar ยท 2026

Nonreciprocity, a hallmark of nonequilibrium systems, can generate dynamics not possible near thermodynamic equilibrium, including oscillatory and rotating patterns. The onset of temporal oscillationsโ€ฆ

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Sensitivities of Black Hole Images from GRMHD Simulations

Pedro Naethe Motta, Mario Raia Neto, Cora Prather, Alejandro Cardenas-Avendano ยท 2026

The advent of high-fidelity imaging of supermassive black holes calls for efficient and robust data-analysis methods. In this work, we use $\texttt{Jipole}$, a differentiable, $\texttt{ipole}$-based rโ€ฆ

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Emergence of Complex Structures

Francisco-Shu Kitaura ยท 2026

Complex structures often emerge from initially homogeneous or weakly correlated states. We address the apparent tension between this ordering and entropy growth through a unified framework combining sโ€ฆ

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Extended Gravity Theories from a Thermodynamic Perspective

H. R. Fazlollahi ยท 2026

We extend the thermodynamic derivation of gravity in the Jacobson framework by generalizing the Clausius relation through a nontrivial entropy functional. We show that entropy deformations appear as mโ€ฆ

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Weak Adversarial Neural Pushforward Method for the Wigner Transport Equation

Andrew Qing He, Wei Cai, Sihong Shao ยท 2026

We extend the Weak Adversarial Neural Pushforward Method to the Wigner transport equation governing the phase-space dynamics of quantum systems. The central contribution is a structural observation: iโ€ฆ

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Introducing sapphire: Towards Hybrid Physics-Informed, Data-Driven Modeling of Galaxy Formation

Viraj Pandya, Greg L. Bryan, T. Lucas Makinen, Austen Gabrielpillai, Christopher Carr, Drummond B. Fielding, Lars Hernquist, Matthew Ho, Kartheik Iyer, Christian Kragh Jespersen, Sophie Koudmani, Marta Laska, Pablo Lemos, Christopher C. Lovell, Lucia A. Perez, William F. Robinson Jr., Rachel S. Somerville, Tjitske K. Starkenburg, Richard Stiskalek, Bryan Terrazas, G. Mark Voit ยท 2026

Semi-analytic models (SAMs) have been treating galaxy populations as dynamical systems for $\gtrsim50$ years, but their evolution equations remain poorly constrained. We introduce sapphire, a modular,โ€ฆ

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Subtleties in non-equilibrium horizon thermodynamics of modified gravity theories

Vishnu A Pai, Vishnu S Namboothiri, Titus K Mathew ยท 2026

Thermodynamic interpretations of gravity often arise from applying the Clausius relation to spacetime horizons. In modified gravity theories with higher-order equations of motion, such as f(R) and scaโ€ฆ

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Breaking the Entanglement-Structure Trade-off: Many-Body Localization Protects Emergent Holographic Geometry in Random Tensor Networks

Zhihua Liang ยท 2026

We present a systematic numerical investigation of the "entanglement geometry gravity" chain in random tensor networks (RTN) established by the ER EPR conjecture and Jacobson's thermodynamic derivatioโ€ฆ

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Hydrodynamic Backflow for Easing the Fermion Sign in Finite-Temperature Electron Path Integral Simulations

Ingvars Vitenburgs, Jarvist Moore Frost ยท 2026

Some notable systems, such as room-temperature superconductors and materials for controlled nuclear fusion, require an accurate description of finite-temperature quantum matter. Stochastic path integrโ€ฆ

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Geometry-informed neural atlas for boundary value problems of complex 3D geometries

WaiChing Sun ยท 2026

When three-dimensional bodies contain thin features, non-trivial topology, or scan-derived surfaces, volumetric meshing can become the dominant bottleneck in simulation workflows. We replace this stepโ€ฆ

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The Evolving Faber-Jackson Relation: A Unifying Framework for Galaxy Ages and the Baryonic Tully-Fisher Connection

Stuart Marongwe, Stuart Kauffman ยท 2026

The baryonic Tully-Fisher relation (BTFR) and Faber-Jackson relation (FJR) represent fundamental scaling laws linking the baryonic mass of galaxies to their kinematics, yet their physical origin and aโ€ฆ

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Will a time-varying complex system be stable?

Francesco Ferraro, Christian Grilletta, Amos Maritan, Samir Suweis, Sandro Azaele ยท 2026

Randomly-assembled dynamical systems are theoretically predicted to be unstable upon crossing a critical threshold of complexity, as first shown by May. Yet, empirical complex systems exhibit remarkabโ€ฆ

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Continuous Sensitivity Analysis for $\delta N$ Formalism

S. Mohammad Ahmadi ยท 2026

The $\delta N$ formalism provides a powerful non-perturbative framework for following the evolution of primordial curvature perturbations on super-horizon scales. However, its standard implementation โ€ฆ

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