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The time evolution of the thermally activated decay rates is considered. This evolution is of particular importance for the recent nanoscale experiments discussed in the literature, where the potential barrier is relatively low (or the…

统计力学 · 物理学 2021-04-21 Maria Chushnyakova , Igor Gontchar , Natalya Khmyrova

We provide a framework for optimizing energy conversion processes in coherent quantum conductors fed by nonthermal resources. Such nonthermal resources, which cannot be characterized by temperatures or electrochemical potentials, occur in…

介观与纳米尺度物理 · 物理学 2025-11-26 Elsa Danielsson , Henning Kirchberg , Janine Splettstoesser

In the present work we study numerical solution of the radial Dirac equation in a specific case - ab-initio pseudopotential generating process - which is needed within the electronic structure calculations using a Density Functional Theory…

原子物理 · 物理学 2007-10-19 Ondrej Certik

This article presents a theoretical framework for enhancing nuclear fusion rates in solid-state environments under near-ambient conditions. Drawing on quantum tunneling, electron screening, and resonance energy transfer, the study proposes…

When a composite containing nonlinear dielectric particles suspended in a host medium is subjected to a sinusoidal alternating current (ac) electric field, the dielectric response of the composite will generally consist of ac fields at…

软凝聚态物质 · 物理学 2007-05-23 J. P. Huang

We analyse a modified Dirac equation based on a noncommutative structure in phase space. The noncommutative structure induces generalised momenta and contributions to the energy levels of the standard Dirac equation. Using techniques of…

数学物理 · 物理学 2019-09-16 Marco Maceda , Jairo Villafuerte-Lara

Transcorrelation (TC) techniques effectively enhance convergence rates in strongly correlated fermionic systems by embedding electron-electron cusp into the Jastrow factor of similarity transformations, yielding a non-Hermitian, yet…

量子物理 · 物理学 2025-03-19 Bruna G. M. Araújo , Antonio M S Macedo

We investigate the energy transfer dynamics in a donor-acceptor model by developing a time-local master equation technique based on a variational transformation of the underlying Hamiltonian. The variational transformation allows a…

量子物理 · 物理学 2011-09-19 Dara P. S. McCutcheon , Ahsan Nazir

We revisit the instability properties of the recovery of the absorption coefficient for the radiative transfer equation in the diffusive regime. To this end, we develop a rather robust framework building on [Koch-R\"uland-Salo, 2021] which…

偏微分方程分析 · 数学 2026-05-21 Elena Demattè , Alessandro Felisi , Angkana Rüland , Juan J. L. Velázquez

This paper presents nonlinear iterative methods for the fundamental thermal radiative transfer (TRT) model defined by the time-dependent multifrequency radiative transfer (RT) equation and the material energy balance (MEB) equation. The…

数值分析 · 数学 2024-09-24 Dmitriy Y. Anistratov

Based on a true phase space probability distribution function and an ensemble averaging procedure we have recently developed [Phys. Rev. E 65, 021109 (2002)] a non-Markovian quantum Kramers' equation to derive the quantum rate coefficient…

统计力学 · 物理学 2009-11-07 Dhruba Banerjee , Suman Kumar Banik , Bidhan Chandra Bag , Deb Shankar Ray

An approach which allows to include the corrections from non-orthogonality of electron states in contacts and quantum dots is developed. Comparison of the energy levels and charge distributions of electrons in 1D quantum dot (QD) in…

介观与纳米尺度物理 · 物理学 2009-11-07 J. Fransson , O. Eriksson , B. Johansson , I. Sandalov

We propose a novel approach to the problem of polarizabilities and dissociation in electric fields from the static limit of the Vignale-Kohn (VK) functional. We consider the response to the purely scalar part of the VK response…

材料科学 · 物理学 2009-11-11 Neepa T. Maitra , Meta van Faassen

We study diffusion-controlled processes in nonequilibrium steady states, where standard rate theory assumptions break down. Using transition path theory, we generalize the relations between reactive probability fluxes and measures of the…

化学物理 · 物理学 2025-06-02 Seokjin Moon , David T. Limmer

The d-band center model of Hammer and N{\o}rskov is widely used in understanding and predicting catalytic activity on transition metal (TM) surfaces. Here, we demonstrate that this model is inadequate for capturing the complete catalytic…

计算物理 · 物理学 2016-10-07 Satadeep Bhattacharjee , Umesh V Waghmare , S. C. Lee

In the vicinity of ground-state phase transitions quantum correlations can display non-analytic behavior and critical scaling. This signature of emergent collective effects has been widely investigated within a broad range of equilibrium…

统计力学 · 物理学 2022-08-31 Mario Boneberg , Igor Lesanovsky , Federico Carollo

Here we study the polaronic transport through molecules weakly connected to metallic electrodes in the nonlinear response regime. Molecule itself is treated as a quantum dot with discrete energy levels, its connection to the electrodes is…

介观与纳米尺度物理 · 物理学 2007-07-22 Kamil Walczak

Standard variational methods tend to obtain upper bounds on the ground state energy of quantum many-body systems. Here we study a complementary method that determines lower bounds on the ground state energy in a systematic fashion, scales…

量子物理 · 物理学 2015-05-28 Tillmann Baumgratz , Martin B. Plenio

In this paper, we extend the unified kinetic particle (UGKP) method to the frequency-dependent radiative transfer equation with both absorption-emission and scattering processes. The extended UGKP method could not only capture the diffusion…

计算物理 · 物理学 2023-02-17 Yuan Hu , Chang Liu

A Lagrangean for the dynamics of an electromagnetic field in a dispersive and dissipative material is constructed (adapting some ideas by Bekenstein and Hannay) and an expression for the energy density that is positive is obtained from it.…

经典物理 · 物理学 2009-11-10 R. Englman , A. Yahalom