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๐Ÿ” rishabh singh ๐Ÿ“‚ Physics
Showing 738 results for "rishabh singh" in Physics
Physics Preprint PDF DOI

The Sound of the Universe: A Resonant Gravitational Instability Driven by Baryon-Dark Matter Relative Drift

Mohamad Shalaby, Avery Broderick ยท 2026

Dark matter and baryons acquire a relative velocity after decoupling in the early Universe. Baryons are gravitationally unstable only above their Jeans scale, while cold dark matter (CDM) is unstable โ€ฆ

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Holographic dark energy as a source for slowly rotating wormholes: Implications for null geodesics and shadows

A. Errehymy, S. K. Maurya, M. Govender, K. N. Singh, J. Rayimbaev, B. Myrzakulova, S. Murodov ยท 2026

In this work, we explore for the first time slowly rotating traversable wormholes embedded in holographic dark energy. We focus on three representative holographic dark energy models -- R\'{e}nyi, mixโ€ฆ

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Some progress on the use of the variational method in quantum field theory

Antoine Tilloy ยท 2026

Strongly coupled quantum field theories in $(1+1)$ dimensions are notoriously hard to solve non-perturbatively. Variational methods, despite their success for quantum many-body physics on the lattice,โ€ฆ

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Hyperbolic form factors for Yukawa interactions, and applications to the Earth

Pierre Fayet ยท 2026

We define the hyperbolic form factor of a density distribution as its bilateral Laplace transform, related by duality or analytic continuation to its form factor. For a sphere it is given by $\Phi(x =โ€ฆ

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Fourier transform of irregular connections on $\mathbb P^1$ and classification of Argyres-Douglas theories

Jean Doucot ยท 2026

We give a mathematical interpretation of the dualities between type $A$ Argyres-Douglas theories recently obtained by Beem, Martone, Sacchi, Singh and Stedman, building on work of Xie. Using the fact โ€ฆ

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Integrable deformations of the Dirac--sinh-Gordon system

Laith H. Haddad ยท 2026

We construct a two-dimensional family of integrable coupled Dirac--scalar field theories in $1+1$ dimensions, parameterized by $(\thz,\alpha)\in[0,\pi/2]^2$, whose Lax connection takes values in $\slCโ€ฆ

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Axions on a Hyperbolic Ride: Geometric Suppression of CMB Isocurvature and a Blue-Tilted Spectrum

Sai Chaitanya Tadepalli ยท 2026

CMB limits on cold-dark-matter isocurvature are often interpreted as excluding the simultaneous realization of high-scale inflation and large QCD axion decay constants in pre-inflationary Peccei--Quinโ€ฆ

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Investigating HII Regions in the Disk of NGC 7331 with the Circumgalactic H$\alpha$ Spectrograph

Nazende Ipek Kerkeser, Nicole Melso, David Schiminovich, Erika Hamden, Meghna Sitaram, Ignacio Cevallos-Aleman ยท 2026

We investigate the ionized gas kinematics of HII regions in the disk of NGC 7331 using integral field unit data collected with the Circumgalactic H$\alpha$ Spectrograph (CH$\alpha$S). NGC 7331 is a weโ€ฆ

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Addressing intramolecular vibrational redistribution in a single molecule through pump and probe surface-enhanced vibrational spectroscopy

Aurelian Loirette-Pelous, Roberto A. Boto, Javier Aizpurua, Ruben Esteban ยท 2026

The development of accurate tools to characterize Intramolecular Vibrational Redistribution (IVR) is of major interest in chemistry. In this context, surface-enhanced vibrational spectroscopies stand โ€ฆ

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Structure Functions for small DIS $x$

Hrachya M. Babujian, Angela Foerster, Michael Karowski ยท 2025

Structure Functions for small DIS (deep inelastic scattering) $x$ for integrable models are investigated, in particular, for the $O(N)$~$\sigma $-model and $SU(N)$ chiral Gross-Neveu model, which are โ€ฆ

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An integrable hierarchy associated with loop extension of $\mathbb{Z}_2^2$-graded $\mathfrak{osp}(1|2)$

N. Aizawa, I. Fujii, R. Ito ยท 2025

A hierarchy of $\mathbb{Z}_2^2$-graded integrable equations is constructed using the loop extension of the $\mathbb{Z}_2^2$-graded Lie superalgebra $\mathfrak{osp}(1|2)$. This hierarchy includes $\matโ€ฆ

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Microscopic signatures of Chern number sign reversal in twisted bilayer WSe2

Ke Lv, Ya-Ning Ren, Lin He ยท 2025

The discovery of quantized Chern numbers in twisted transition metal dichalcogenide (TMD) homobilayers,including 3.7{deg} twisted MoTe2 and 1.23{deg} twisted WSe2,has emerged as a defining breakthrougโ€ฆ

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A Self-Adjusting FEM-BEM Coupling Scheme for the Nonlinear Poisson-Boltzmann Equation

Mauricio Guerrero-Montero, Michal Bosy, Christopher D. Cooper ยท 2025

The Poisson-Boltzmann equation is widely used to model molecular electrostatics; however, it is usually solved in linearised form because the sinh nonlinearity is challenging, limiting its applicabiliโ€ฆ

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Wightman axiomatics of the bootstrap construction of the 1+1 dimensional Sinh-Gordon model

Karol K. Kozlowski, Alex Simon ยท 2025

The integrable bootstrap program allows one to express the tempered distributions associated with the multipoint functions of the integrable 1+1 dimensional Sinh-Gordon quantum field theory by means oโ€ฆ

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Variational Method in Quantum Field Theory

Arthur Hutsalyuk, Marton Lajer, Giuseppe Mussardo, Andrea Stampiggi ยท 2025

We develop a variational framework for addressing two-dimensional non-integrable quantum field theories through the exact structure of their integrable counterparts. Concentrating on the $\varphi^4$ Lโ€ฆ

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Quantum-corrected gravitational collapse and multi-messenger signatures: Beyond spherical symmetry in loop quantum gravity

Hoang Van Quyet ยท 2025

We present a comprehensive theoretical framework for multi-messenger signatures arising from quantum-corrected gravitational collapse within an extended Ashtekar-Olmedo-Singh (AOS) loop quantum gravitโ€ฆ

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Maximal extension on converse monogamy of entanglement for tripartite pure states

Junhyeong An, Soojoon Lee ยท 2025

Unlike classical correlations, entanglement cannot be freely shared among multiple parties. This unique feature of quantum systems is known as the monogamy of entanglement. While it holds for all multโ€ฆ

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Krylov complexity and Wightman power spectrum with positive chemical potential in Schr\"odinger field theory

Peng-Zhang He, Lei-Hua Liu, Hai-Qing Zhang, Qing-Quan Jiang ยท 2025

We study Krylov complexity in Schr\"odinger field theory in the grand canonical ensemble with chemical potential $\mu$, with an emphasis on the qualitatively new features that arise for $\mu>0$. In thโ€ฆ

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Superconformal symmetry in a class of Schellekens theories

Harry Fosbinder-Elkins, Jeffrey A. Harvey ยท 2025

In 2023, Moore and Singh used the theory of orbifold vertex operator algebras to explicitly construct an $\mathcal{N} = 1$ supercurrent in the Beauty and the Beast module of Dixon, Ginsparg, and Harveโ€ฆ

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Form factors of composite branch-point twist operators in the sinh-Gordon model on a multi-sheeted Riemann surface: semiclassical limit

Michael Lashkevich, Amir Nesturov ยท 2025

Quantum sinh-Gordon model in 1+1 dimensions is one of the simplest and best-studied massive integrable relativistic quantum field theories. We consider this theory on a multi-sheeted Riemann surfaces โ€ฆ

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