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General Physics and Astronomy

General Physics and Astronomy

Interdisciplinary research spanning multiple areas of physics and astronomy that bridges traditional boundaries within this field

6 papers in this specialization

Paperzilla Papers in General Physics and Astronomy

Dualities in Physics

This book explores "dualities" in physics, where two seemingly different theories describe the same phenomenon. It covers examples from quantum mechanics to string theory, discussing how these "transformations" help solve complex problems and what they mean for our understanding of physics.

Sep 22, 06:09 AM

Constraints on axion-like particles from active galactic nuclei seen through galaxy clusters

This study introduces a new method for searching for axion-like particles (ALPs) using the stacked spectra of active galactic nuclei (AGNs) behind galaxy clusters. While a marginal detection (2σ) of ALPs is observed in the absence of systematic uncertainties, further investigation with larger datasets and multi-wavelength data is crucial for confirmation. The study demonstrates the potential of this technique to probe previously inaccessible ALP parameter space.

Aug 16, 03:11 AM

The vast world of quantum advantage

This perspective article examines our current understanding of quantum advantages, the situations where quantum systems outperform classical ones. The authors highlight that proving and identifying real quantum speedups is tricky, and they propose five key characteristics of a "true" quantum advantage: predictability, typicality, robustness, verifiability, and usefulness. They also discuss different areas where these advantages might appear, like computing, sensing, and communication, and point out that some quantum advantages may be so complex that we can't even predict them with our current tools.

Aug 11, 03:50 AM

The Philosophy and Physics of Duality

This book gives a philosophical analysis of dualities in physics, understood as maps between theories. These maps are defined to be isomorphisms that preserve the values of the quantities and the dynamics. The authors discuss several well-known examples of dualities in statistical physics, quantum field theory, and string theory. They also discuss the implications of dualities for a variety of philosophical notions, such as realism, theoretical equivalence, and emergence.

Aug 09, 12:43 PM

Experimental confirmation of barrierless reactions between HeH+ and deuterium atoms suggests a lower abundance of the first molecules at very high redshifts

Experimental and theoretical investigation confirmed that the reaction between helium hydride ions (HeH+) and deuterium atoms is fast at low temperatures, which has implications for the abundance of the first molecules in the early universe. This suggests previous estimates, based on an older model with an artificial energy barrier, underestimated the reaction rate, potentially affecting models of early universe chemistry and star formation.

Aug 05, 04:43 PM

Physics-informed PointNet: A deep learning solver for steady-state incompressible flows and thermal fields on multiple sets of irregular geometries

This paper introduces Physics-Informed PointNet (PIPN), a deep learning solver that predicts fluid flow and thermal fields on multiple sets of irregular geometries. PIPN uses a point-cloud neural network to handle irregular shapes and physics-informed learning to capture the underlying physics, allowing it to be trained on various geometries simultaneously and generalize to unseen shapes from different categories.

Jul 14, 05:09 PM

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