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We compute highly accurate first principle based \textit{ab initio} adiabatic potential energy surfaces (PESs) using State-Averaged Multi-Configurational Self-Consistent Field (SA-MCSCF) followed by internally contracted Multi-Reference…

化学物理 · 物理学 2026-03-10 Avik Guchait , Gourhari Jana , Satyam Ravi , Koushik Naskar , Satrajit Adhikari

Correlations in topological states of matter provide a rich phenomenology, including a reduction in the topological classification of the interacting system compared to its non-interacting counterpart. This happens when two phases that are…

强关联电子 · 物理学 2020-07-01 Johannes S. Hofmann , Fakher F. Assaad , Raquel Queiroz , Eslam Khalaf

We present calculations of the correlation energies of crystalline solids and isolated systems within the adiabatic-connection fluctuation-dissipation formulation of density-functional theory. We perform a quantitative comparison of a set…

材料科学 · 物理学 2016-07-29 Christopher E. Patrick , Kristian S. Thygesen

In this paper we derive an equation of state for liquid cesium based on a suggested potential function in accord to the characteristics large attraction and soft repulsion at the asymptotes of interaction potentials. By considering the…

化学物理 · 物理学 2007-05-23 M. H. Ghatee , M. Bahadori

Two models have been proposed for the interconnection of the defect Gibbs energy g^i with bulk properties almost 60 and 30 years ago, respectively. The one, proposed by Zener, assumes that g^i can be accounted for the work that goes into…

材料科学 · 物理学 2017-05-11 P. Varotsos

We report a novel experimental technique for the comparison of ionization processes in ultrafast laser pulses irrespective of pulse ellipticity. Multiple ionization of xenon by 50 fs 790 nm, linearly and circularly polarized laser pulses is…

Following the recent work of Eriksen et al. [arXiv:2008.02678], we report the performance of the \textit{Configuration Interaction using a Perturbative Selection made Iteratively} (CIPSI) method on the non-relativistic frozen-core…

化学物理 · 物理学 2020-11-04 Pierre-François Loos , Yann Damour , Anthony Scemama

Modern density functional theory (DFT) calculations employ the Kohn-Sham (KS) system of non-interacting electrons as a reference, with all complications buried in the exchange-correlation energy (Exc). The adiabatic connection formula gives…

其他凝聚态物理 · 物理学 2009-10-02 Zhenfei Liu , Kieron Burke

Adiabatic connection models (ACMs), which interpolate between the limits of weak and strong interaction, are powerful tools to build accurate exchange-correlation functionals. If the exact weak-interaction expansion from second-order…

化学物理 · 物理学 2022-09-08 S. Śmiga , F. Della Sala , P. Gori-Giorgi , E. Fabiano

A G{\"o}rling-Levy (GL)-based perturbation theory along the range-separated adiabatic connection is assessed for the calculation of electronic excitation energies. In comparison with the Rayleigh-Schr{\"o}dinger (RS)-based perturbation…

化学物理 · 物理学 2018-05-23 Elisa Rebolini , Andrew M. Teale , Trygve Helgaker , Andreas Savin , Julien Toulouse

A non-empirical exchange functional based on an interpolation between two limits of electron density: slowly varying limit and asymptotic limit, is proposed. In the slowly varying limit, we follow the study by Kleinman in 1984 which…

材料科学 · 物理学 2020-08-04 Teepanis Chachiyo , Hathaithip Chachiyo

Density functional approximations are known to significantly overestimate the polarizabilities of long chain-like molecules. We study the static electric dipole polarizabilities and the vertical ionization potentials of polyacenes from…

化学物理 · 物理学 2021-03-10 Sharmin Akter , Yoh Yamamoto , Rajendra R. Zope , Tunna Baruah

Self-interaction error (SIE), arising from the imperfect cancellation of the spurious classical Coulomb interaction between an electron and itself, is a persistent challenge in modern density functional approximations. This issue is…

The solvent-induced interactions (SII) between flexible solutes can be separated into two distinct components: the solvation-induced conformational effect, and the joint solvation interaction (JSI). The JSI quantifies the thermodynamic…

化学物理 · 物理学 2024-08-19 Ali Hassanali , Colin K. Egan

The fully self-consistent GW approximation is an established method for electronic structure calculations. Its most serious deficiency is known to be an incorrect prediction of the dielectric response. In this work we examine the GW…

强关联电子 · 物理学 2017-05-24 Kris Van Houcke , Igor S. Tupitsyn , Andrey S. Mishchenko , Nikolay V. Prokof'ev

We propose an adiabatic Ramsey interferometry technique for detecting weak nonlinearities with trapped ions. The method relies on using the quantum Rabi model as a probe, which is sensitive to nonlinear symmetry-breaking perturbations. We…

量子物理 · 物理学 2026-04-01 Venelin P. Pavlov , Bogomila S. Nikolova , Peter A. Ivanov

The results of a theoretical investigation on the stopping power of ions moving in a disordered two-dimensional degenerate electron gas are presented. The stopping power for an ion is calculated employing linear response theory using the…

等离子体物理 · 物理学 2009-01-16 H. B. Nersisyan , A. K. Das

By combining extrapolated selected configuration interaction (sCI) energies obtained with the CIPSI (Configuration Interaction using a Perturbative Selection made Iteratively) algorithm with the recently proposed short-range…

化学物理 · 物理学 2020-06-05 Emmanuel Giner , Anthony Scemama , Julien Toulouse , Pierre-François Loos

In recent years, Adiabatic Connection Interpolations developed within Density Functional Theory (DFT) have been found to provide satisfactory performances in the calculation of interaction energies when used with Hartree-Fock (HF)…

化学物理 · 物理学 2023-07-21 Sara Giarrusso , Aurora Pribram-Jones

We realize a two-component dipolar Fermi gas with tunable interactions, using erbium atoms. Employing a lattice-protection technique, we selectively prepare deeply degenerate mixtures of the two lowest spin states and perform…

量子气体 · 物理学 2018-09-11 S. Baier , D. Petter , J. H. Becher , A. Patscheider , G. Natale , L. Chomaz , M. J. Mark , F. Ferlaino