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🔍 krishna kumar 📂 Physics 📄 Preprint
Showing 444 results for "krishna kumar" in Physics · Preprint
Physics Preprint PDF DOI

Microscopic investigation of $E2$ matrix elements in atomic nuclei -- II

Kouser Qureshie, S. P. Rouoof, J. A. Sheikh, N. Rather, S. Jehangir, G. H. Bhat, S. Frauendorf · 2026

The present work is a continuation of our earlier investigation with the primary objective to systematically calculate the $E2$ matrix elements using the microscopic approach of the triaxial projected…

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A Covariant Phase Space Approach to Einstein-AEther Gravity

Walter Arata, Stefano Liberati, Giulio Neri · 2026

Black hole thermodynamics in Lorentz-violating gravity is subtle because different excitations propagate at different speeds and hence identify different causal horizons. We revisit Einstein--AEther g…

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Axially symmetric wormholes

I. A. Sarmiento-Alvarado, Leonel Bixano, Tonatiuh Matos · 2026

In this work, we derive an exact vacuum solution to the Einstein field equations that depends on three constant parameters: the throat radius $r_0$, a parameter $q$, which is closely associated with t…

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A fresh look at boundary terms in Einstein-Hilbert gravity via an initial value variational principle

Songmin Ha, Alexander Rothkopf · 2026

A key tenet of general relativity is the dynamical nature of space-time, ideally represented as an initial value problem. Here we explore the variational formulation of classical Einstein-Hilbert grav…

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Imaging two-body correlations in atomic nuclei via low- and high-energy processes

Stavros Bofos, Benjamin Bally, Thomas Duguet, Mikael Frosini · 2026

Characterizing the correlated behavior of nucleons inside atomic nuclei constitutes a long-standing challenge, both experimentally and theoretically. It has recently been understood that two-particle …

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Spectral moments of Bures-Hall ensemble and applications to entanglement entropy

Linfeng Wei, Youyi Huang, Lu Wei · 2026

We study spectral moments of the Bures-Hall random matrices ensemble. The main result establishes a recurrence relation for the $k$-th spectral moment valid for a real-valued $k$, in contrast to preva…

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Breaking Four-Point and Three-Point Bending Tests

Subhrangsu Saha, Jeffery R. Roesler, Oscar Lopez-Pamies · 2026

Since their initial standardizations in the 1930s and 1950s, the so-called four-point and three-point bending tests on unnotched beams have been embraced by practitioners as two popular methods to ind…

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Higher-form symmetries in supergravity, scalar charges and black-hole thermodynamics

Gabriele Barbagallo, Jose Luis V. Cerdeira, Carmen Gomez-Fayren, Patrick Meessen, Tomas Ortin · 2025

Minimal 5-dimensional supergravity compactified on a circle gives the T$^{3}$ model of $\mathcal{N}=2,d=4$ supergravity, whose duality group is SL$(2,\mathbb{R})$. We study exhaustively the relations …

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Simulating droplet adhesion on superhydrophobic surfaces

Pawan Kumar, Joseph D. Berry · 2025

A numerical model is proposed to simulate the adhesion, compression, and subsequent detachment of a micro-liter droplet from a superhydrophobic surface composed of chemically homogeneous pillars arran…

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From percolation transition to Anderson localization in one-dimensional speckle potentials

Margaux Vrech, Jan Major, Dominique Delande, Marcel Filoche, Nicolas Cherroret · 2025

Classical particles in random potentials typically experience a percolation phase transition, being trapped in clusters of mean size $\chi$ that diverges algebraically at a percolation threshold. In c…

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The phase-field model of fracture incorporating Mohr-Coulomb, Mogi-Coulomb, and Hoek-Brown strength surfaces

S Chockalingam, Adrian Buganza Tepole, Aditya Kumar · 2025

Classical phase-field theories of brittle fracture capture toughness-controlled crack growth but do not account for the material's strength surface, which governs fracture nucleation in the absence of…

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Conundrum of regular black holes with nonlinear electromagnetic fields

Ana Bokulic, Tajron Juric, Ivica Smolic · 2025

The search for regular black holes with nonlinear electromagnetic fields has sprouted numerous candidates, each exhibiting certain virtues but often accompanied by significant drawbacks. We demonstrat…

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A Quasigroup Approach for Conservation Laws in Asymptotically Flat Spacetimes

Alfonso Zack Robles, Alexander I. Nesterov, Claudia Moreno · 2025

In the framework of the quasigroup approach to conservation laws in general relativity, we show how the infinite-parametric Newman-Unti group of asymptotic symmetries can be reduced to the Poincare qu…

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Sublogarithmic Distillation in all Prime Dimensions using Punctured Reed-Muller Codes

Tanay Saha, Shiroman Prakash · 2025

Magic state distillation is a leading but costly approach to fault-tolerant quantum computation, and it is important to explore all possible ways of minimizing its overhead cost. The number of ancilla…

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Negative mass singularities mimicking dark energy

Bob Holdom · 2025

One or two negative mass singularities are found to occur in static inhomogeneous spatially closed solutions to the Einstein equations. The singularities produce a positive Komar mass, and this decrea…

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Rotating Extremal Black Holes in Einstein-Born-Infeld Theory

Tomas Hale, Robie A. Hennigar, David Kubiznak · 2025

We construct exact solutions that describe the near horizon region of extremal rotating black holes in Einstein-Born-Infeld theory. Using generalized Komar integrals, we extract the electric charge an…

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Equality of ADM mass and generalized Komar energy in asymptotically-flat dynamical spacetimes

Zhi-Wei Wang, Samuel L. Braunstein · 2025

We find a relation between the ADM mass and a generalized Komar energy in asymptotically-flat spacetime. We do not need to assume the existence of either a Killing or even asymptotically-Killing vecto…

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Dynamical localization and delocalization for random Schrodinger operators with $\delta$-interactions in $\mathbb{R}^3$

Peter D. Hislop, Werner Kirsch, M. Krishna · 2025

We prove that the random Schrodinger operators on $\mathbb{R}^3$ with independent, identically distributed random variables and single-site potentials given by $\delta$-functions on $\mathbb{Z}^3$, ex…

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Evolution of quasiparticle edge states with Hubbard interaction in Rice-Mele chain

Jyoti Bisht, Brijesh Kumar · 2025

We study the behaviour of edge states in Rice-Mele model with Hubbard interaction, U , at half-filling using density matrix renormalization group, exact diagonalization and effective charge dynamics i…

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The shadows and photon rings of two minimal deformations of Schwarzschild black holes

Hong-Er Gong, Junlin Qin, Yusen Wang, Bofeng Wu, Zhan-Feng Mai, Sen Guo, Enwei Liang · 2025

This paper primarily investigates the optical characteristics of two minimal Schwarzschild black hole deformations, the Kazakov-Solodukhin and Ghosh-Kumar black holes, under different accretion models…

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