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Showing 72 results for "constantine kotropoulos" in Physics
Physics Preprint PDF DOI

Finite-time blow-up of two $(1+1)$D systems rigorously derived from the 3D axisymmetric Euler equations

Yaoming Shi · 2026

We study two $(1+1)$-dimensional systems, denoted $(R0)$ and $(Z0)$, that are rigorously derived from the three-dimensional axisymmetric Euler equations in a signed polar formulation on the meridian p…

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Physics Preprint PDF DOI

Thermoelectric performance of Ni-Au metallic alloys determined by resonant scattering

Kacper Pryga, Bartlomiej Wiendlocha · 2025

This work presents a theoretical study of the electronic structure and transport properties of Ni-Au alloys, recently identified as excellent thermoelectric metals with a power factor significantly ex…

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Physics Preprint PDF DOI

Non-Gaussian velocity distributions Maxwell would understand

J. A. S. Lima, M. H. Benetti · 2025

In 1988, Constantino Tsallis proposed an extension of the Boltzmann statistical mechanics by postulating a new entropy formula, $S_q = k_B\ln_q W$, where $W$ is the number of microstates accessible to…

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Physics Preprint PDF DOI

Fluctuating Lattice, Several Energy Scales

Holger Bech Nielsen · 2025

In part I: We find a series physical scales such as 1) Planck scale, 2) Minimal approximate grand unification SU(5), 3) the mass scale of the see saw model right handed or Majorana neutrinoes, some in…

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Physics Preprint PDF DOI

Mapping delocalization of impurity bands across archetypal Mott-Anderson transition

M. Parzer, F. Garmroudi, A. Riss, T. Mori, A. Pustogow, E. Bauer · 2024

Tailoring charge transport in solids on demand is the overarching goal of condensed-matter research as it is crucial for electronic applications. Yet, often the proper tuning knob is missing and extri…

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Physics Preprint PDF DOI

Data-driven Koopman operator predictions of turbulent dynamics in models of shear flows

C. Ricardo Constante-Amores, Andrew J. Fox, Carlos E. Perez De Jesus, Michael D. Graham · 2024

The Koopman operator enables the analysis of nonlinear dynamical systems through a linear perspective by describing time evolution in the infinite-dimensional space of observables. Here this formalism…

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Physics Preprint PDF DOI

Internally heated convection with rotation: bounds on heat transport

Ali Arslan · 2024

This work investigates heat transport in rotating internally heated convection, for a horizontally periodic fluid between parallel plates under no-slip and isothermal boundary conditions. The main res…

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Physics Preprint PDF DOI

Asymptotic scaling laws for periodic turbulent boundary layers and their numerical simulation up to Re_theta = 8300

Andrew Wynn, Saeed Parvar, Joseph O Connor, Sylvain Laizet · 2024

We provide a rigorous analysis of the self-similar solution of the temporal turbulent boundary layer, recently proposed in [2], in which a body force is used to maintain a statistically steady turbule…

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Physics Preprint PDF DOI

Technical, organizational and oral history regarding the soil samples measurements for Cs-137 because of the Chernobyl accident fallout

Nick P. Petropoulos · 2024

Data are given, commentary is supplied and explanations are provided with regard to the technical, the organizational and, of course, the human history connected to the time of research, which resulte…

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Physics Preprint PDF DOI

Open Problems within Nonextensive Statistical Mechanics

Kenric P. Nelson · 2023

Nonextensive Statistical Mechanics has developed into an important framework for modeling the thermodynamics of complex systems and the information of complex signals. Upon the 80th birthday of the fi…

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Physics Preprint PDF DOI

Quantum confinement in Dirac-like nanostructures

C. A. Downing, M. E. Portnoi · 2023

In Westminster Abbey, in a nave near to Newton's monument, lies a memorial stone to Paul Dirac. The inscription on the stone includes the relativistic wave equation for an electron: the Dirac equation…

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Physics Preprint PDF DOI

Towards a Comprehensive Theory of Metal-Insulator Transitions in Doped Semiconductors

S. Kettemann · 2023

A review is given on the theory of metal-insulator transitions (MIT) in doped semiconductors. We focus in particular on reviewing theories of their anomalous magnetic properties, which emerge from the…

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Physics Preprint PDF DOI

Triplet odd-frequency superconductivity in hybrid superconductor-ferromagnet structures

F. Sebastian Bergeret, Anatoly F. Volkov · 2022

We present an overview of the contributions made by Konstantin B. Efetov and the authors to the field of triplet odd-frequency superconductivity in hybrid ferromagnet-superconductor structures and the…

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Physics Preprint PDF DOI

Introduction to topological symmetry in QFT

Daniel S. Freed · 2022

This brief note publicizes the quantum framework for symmetry that is developed in our joint paper arXiv:2209.07471 with Greg Moore and Constantin Teleman. We include additional motivation and an appl…

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Physics Preprint PDF DOI

Direct numerical simulations of turbulent jets: vortex-interface-surfactant interactions

C. R. Constante-Amores, T. Abadie, L. Kahouadji, S. Shin, J. Chergui, D. Juric, A. A. Castrejon-Pita, O. K. Matar · 2022

We study the effect of insoluble surfactants on the spatio-temporal evolution of turbulent jets. We use three-dimensional numerical simulations and employ an interface-tracking/level-set method that a…

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Physics Preprint PDF DOI

A removable temperature sensors holder for cryogenic Rayleigh-B\'enard convection cell

Pavel Hanzelka, Ivan Vlcek, Pavel Urban · 2022

A removable holder carrying a set of miniature temperature sensors inside our Rayleigh-B\'enard convection cylindrical cell has been developed. The sensors should not disturb the temperature and veloc…

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Physics Preprint PDF DOI

A Deformed Supersymmetric $w_{1+\infty}$ Symmetry in the Celestial Conformal Field Theory

Changhyun Ahn · 2022

By using the $K$-free complex bosons and the $K$-free complex fermions, we construct the ${\cal N}=2$ supersymmetric $W_{\infty}^{K,K}$ algebra which is the matrix generalization of previous ${\cal N}…

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Physics Preprint PDF DOI

Propagation of phase-imprinted solitons from superfluid core to Mott-insulator shell and superfluid shell

Yuma Watanabe, Shohei Watabe, Tetsuro Nikuni · 2021

We study phase-imprinted solitons of ultracold bosons in an optical lattice with a harmonic trap, which shows the superfluid (SF) and Mott-insulator (MI) shell structures. The earlier study [Konstanti…

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Physics Preprint PDF DOI

The QED four -- photon amplitudes off-shell: part 1

Naser Ahmadiniaz, Cristhiam Lopez-Arcos, Misha A. Lopez-Lopez, Christian Schubert · 2020

The QED four-photon amplitude has been well-studied by many authors, and on-shell is treated in many textbooks. However, a calculation with all four photons off-shell is presently still lacking, despi…

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Physics Preprint PDF DOI

Collapse vs. blow up and global existence in the generalized Constantin-Lax-Majda equation

Pavel M. Lushnikov, Denis A. Silantyev, Michael Siegel · 2020

The question of finite time singularity formation vs. global existence for solutions to the generalized Constantin-Lax-Majda equation is studied, with particular emphasis on the influence of a paramet…

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