Expertini Research Research

Browse Research Papers

40,383+ open-access research outputs.

✕ Clear
🔍 michael l. klein 📂 Physics
Showing 40383 results for "michael l. klein" in Physics
Physics Preprint PDF DOI

Observation of Vinen turbulence during far-from-equilibrium Bose-Einstein condensation

Sebastian J. Morris, Martin Gazo, Simon M. Fischer, Haoyu Zhang, Christopher J. Ho, Nigel R. Cooper, Christoph Eigen, Zoran Hadzibabic · 2026

Relaxation of far-from-equilibrium quantum fluids, intimately related to the emergence of long-range order, is theoretically associated with the decay of a turbulent isotropic tangle of vortex lines. …

Read Paper →
Physics Preprint PDF DOI

On the polarization position angle jumps in FRB 20240114A

Ninisha Manaswini, Dante M. Hewitt, Laura G. Spitler, Jason W. T. Hessels, Ramesh Karuppusamy, Jeff Huang, Pranav Limaye, Lucas Guillemot, Ismael Cognard · 2026

Fast radio bursts (FRBs), thought to originate from magnetars, exhibit diverse polarization properties that constrain their emission physics and local magneto-ionic environments. The polarization posi…

Read Paper →
Physics Preprint PDF DOI

Compressibility of micromagnetic solutions in tensor train format

Thierry Valet, Nicolas Vukadinovic · 2026

For three-dimensional (3D) magnetic objects with linear size $L$ exceeding a few exchange lengths, the micromagnetic state exhibits pronounced informational sparsity: low-dimensional, high-gradient re…

Read Paper →
Physics Preprint PDF DOI

Hamilton--Jacobi theory for non-conservative field theories in the $k$-contact framework

Javier de Lucas, Julia Lange, Xavier Rivas, Cristina Sardon · 2026

This article develops a Hamilton--Jacobi theory for non-conservative classical field theories, with particular emphasis on dissipative systems, in the framework of co-oriented k-contact geometry. We i…

Read Paper →
Physics Preprint PDF DOI

Probing Near-Threshold $s$-Wave Components in Heavy Nuclei via Coulomb-Assisted Neutron Transfer

Yuki Nakanishi, Junki Tanaka, Atsushi Tamii, Shimpei Endo · 2026

We propose a method to probe weakly bound s-wave neutron components near the neutron emission threshold in heavy nuclei using Coulomb-assisted neutron transfer reactions. Weakly bound s-wave neutrons …

Read Paper →
Physics Preprint PDF DOI

Improved n=1 Empirical Error Field Penetration Threshold Scaling with Ohmic and L-Mode Conventional Tokamak Plasma Discharges

E.M. Bursch, J.K. Park, N.C. Logan, F. Mao, N. Wang, C.F.B. Zimmermann, R.J. Buttery, C. Paz-Soldan, M. Pharr, L. Piron, G. Szepesi, H. Wang, S.M. Yang, JET Contributors, EUROfusion Tokamak Exploitation Team · 2026

This paper presents an updated n=1 error field penetration threshold scaling, which increases fit quality compared to previous error field scaling laws, is produced from an expanded database, and exhi…

Read Paper →
Physics Preprint PDF DOI

Structure-Aware Transformers for Learning Near-Optimal Trotter Orderings with System-Size Generalization in 1D Heisenberg Hamiltonians

Shamminuj Aktar, Reuben Tate, Stephan Eidenbenz · 2026

Trotterization is a standard approach for simulating quantum time evolution on quantum computers, where the Hamiltonian is split into local terms and each term is applied in sequence. The order of the…

Read Paper →
Physics Preprint PDF DOI

Derivation of the Born Rule and Operational Quantum Formalism in the Accessibility Framework through Boundary Reduction

Everett Fall, Hironori Kondo · 2026

We show that the operational quantum formalism -- the Born rule, L\"uders state updating, quantum interference, non-Markovian effective dynamics, and Bell inequality violation at the Tsirelson bound \…

Read Paper →
Physics Preprint PDF DOI

Rydberg states of muonic helium in quantum electrodynamics

A. V. Eskin, A. P. Martynenko, F. A. Martynenko, D. K. Pometko · 2026

The variational method is used to study the energy levels of muonic helium $(\mu^{-} \, e^{-} \, He)$ with an electron in the ground state and a muon in an excited state with principal and orbital qua…

Read Paper →
Physics Preprint PDF DOI

Oscillators from non-semisimple walled Brauer algebras

Sanjaye Ramgoolam, Micha{l} Studzinski · 2026

The walled Brauer algebras $B_N(m,n)$ govern Schur--Weyl duality for unitary groups $U(N)$ acting on mixed tensor spaces $V_N^{\otimes m}\otimes \overline{V}_N^{\otimes n}$ and play an important role …

Read Paper →
Physics Preprint PDF DOI

Perturbative Coulomb branches on $\mathbb{R}^3\times S^1$: the global D-term potential

Arash Arabi Ardehali, Daniel J. Resnick · 2026

We find the perturbative potential on the 3d $\mathcal{N}\!=\!2$ Coulomb branch arising from a chiral 4d $\mathcal{N}\!=\!1$ gauge theory on $\mathbb{R}^3 \times S^1$, zeta-regularizing the D-term cou…

Read Paper →
Physics Preprint PDF DOI

Mujic{\Lambda}: Reconstructing Initial Conditions from Incomplete Redshift Surveys with Projected Optimization

Chenze Dong, Benjamin Horowitz, Adrian E. Bayer, Khee-Gan Lee · 2026

In this paper, we introduce Mujic{\Lambda} (Mapping the Universe with Jax-based Initial Condition Reconstr{\Lambda}ction), an optimization-based framework for reconstructing initial conditions from re…

Read Paper →
Physics Preprint PDF DOI

The Hawking Singularity Theorem for H\"older Continuous Metrics with $L^p$-Bounded Curvature

Michael Kunzinger, Moritz Reintjes, Roland Steinbauer, Ines Vega-Gonzalez · 2026

We prove a low-regularity version of Hawking's singularity theorem for Lorentzian metrics in $W^{1,p}$ with Riemann curvature in $L^p$, where $p>2n$ and $n$ the dimension of spacetime. This extends pr…

Read Paper →
Physics Preprint PDF DOI

Tikhonov-regularised projected gradient flow for equality-constrained bilinear quantum control

Tanveer Ahmad · 2026

We study a projection-type gradient flow for equality-constrained maximisation of a smooth bilinear control objective on $\mathcal{H}=L^2(0,T;\mathbb{R})$, eliminating Lagrange multipliers through an …

Read Paper →
Physics Preprint PDF DOI

Thermodynamic properties of the Kerr Black-hole in non-linear electrodynamics with cosmological constant

Vinayak S. Pawar, Siba Prasad Das · 2026

We study thermodynamic properties, in particular the Temperature~(T), Angular velocity~($\Omega_h$) and Entropy~(S) of the of magnetically charged slowly rotating (with rotation parameter $a \lsim 0.1…

Read Paper →
Physics Preprint PDF DOI

Leptoquarks and the Emergence of the Standard Model Gauge Group in a Self-Consistent Preon Model

Risto Raitio · 2026

We show that in a self-consistent preon model, where Standard Model quarks and leptons are three-body composites confined at a metacolor scale Lambda_cr ~ 10^14 GeV, both leptoquarks and the Standard …

Read Paper →
Physics Preprint PDF DOI

Congestion-free routing on quantum chips

Mithilesh Kumar, Yusuf Tahir, Varun Daiya, Sanjana Mattaparthi, Aarav Shaurya · 2026

Limited connectivity makes nonlocal quantum gates expensive on near-neighbor hardware, where compilation typically relies on SWAP transport, inheriting both depth overhead and path congestion. We pres…

Read Paper →
Physics Preprint PDF DOI

Study on the systematic effects on $b \to c$ inclusive semileptonic decays

Alessandro Barone, Ahmed Elgaziari, Shoji Hashimoto, Zhi Hu, Andreas Juttner, Takashi Kaneko, Ryan Kellermann · 2026

We discuss the calculation of the inclusive semileptonic decay for the process $B_s \to X_c \, l \nu_l$ using lattice QCD. This calculation could be decisive in understanding the long-standing tension…

Read Paper →
Physics Preprint PDF DOI

Newton-Cartan limit of Klein-Gordon AQFT and the collapse of Galilean modular structure

Leonardo A. Pachon · 2026

We extend the established Galilean/relativistic structural divider in algebraic quantum field theory, namely, the absence of Reeh-Schlieder and of Tomita-Takesaki modular flow on local algebras of any…

Read Paper →
Physics Preprint PDF DOI

qSHIFT: An Adaptive Sampling Protocol for Higher-Order Quantum Simulation

Sangjin Lee, Sangkook Choi · 2026

Quantum simulation is a cornerstone application for quantum computing, yet standard methods face a trade-off between circuit depth and accuracy: Trotterization depth scales with the number of Hamilton…

Read Paper →
Page 1 of 2020 Next →