Isolated neutron stars: the challenge of simplicity

R Turolla - Neutron stars and pulsars, 2009 - Springer
The seven soft, thermal sources discovered by ROSAT offer an unprecedented opportunity
to unveil the temperature and magnetic field surface distribution of isolated neutron stars …

Ground states of the hydrogen molecule and its molecular ion in the presence of a magnetic field using the variational Monte Carlo method

SB Doma, M Abu-Shady, FN El-Gammal… - Molecular …, 2016 - Taylor & Francis
By using the variational Monte Carlo (VMC) method, we calculated the 1 s σ g-state
energies, the dissociation energies, and the binding energies of the hydrogen molecule and …

Three-loop correction to the instanton density. I. The quartic double well potential

MA Escobar-Ruiz, E Shuryak, AV Turbiner - Physical Review D, 2015 - APS
This paper deals with quantum fluctuations near the classical instanton configuration.
Feynman diagrams in the instanton background are used for the calculation of the tunneling …

Bonding in the helium dimer in strong magnetic fields: the role of spin and angular momentum

J Austad, A Borgoo, EI Tellgren… - Physical Chemistry …, 2020 - pubs.rsc.org
We investigate the helium dimer in strong magnetic fields, focusing on the spectrum of low-
lying electronic states and their dissociation curves, at the full configuration-interaction level …

Benchmarking density functional approximations for diamagnetic and paramagnetic molecules in nonuniform magnetic fields

S Sen, EI Tellgren - Journal of Chemical Theory and Computation, 2021 - ACS Publications
In this article, correlated studies on a test set of 36 small molecules are carried out with both
wavefunction (HF, MP2, CCSD) and density functional (LDA, KT3, cTPSS, cM06-L) methods …

From outburst to quiescence: the decay of the transient AXP XTE J1810-197

F Bernardini, GL Israel, S Dall'Osso, L Stella… - Astronomy & …, 2009 - aanda.org
Aims. XTE J1810-197 is the first transient anomalous X-ray pulsar ever discovered. Its highly
variable X-ray flux allowed us to study the timing and spectral emission properties of a …

Reactivity dynamics of a confined molecule in presence of an external magnetic field

M Khatua, U Sarkar, PK Chattaraj - International Journal of …, 2015 - Wiley Online Library
Reactivity dynamics and stability of a confined hydrogen molecule in presence of an
external magnetic field has been studied using quantum fluid density functional theory …

Accurate solutions of the Schrödinger and Dirac equations of H2+, HD+, and HT+: With and without Born–Oppenheimer approximation and under magnetic field

A Ishikawa, H Nakashima, H Nakatsuji - Chemical Physics, 2012 - Elsevier
We here give a review of our studies of hydrogen molecular ion (H2+) based on the accurate
solutions of the Schrödinger equation (SE) and Dirac equations (DE) obtained by the free …

Molecular vibrations in the presence of velocity-dependent forces

EI Tellgren, T Culpitt, LDM Peters… - The Journal of Chemical …, 2023 - pubs.aip.org
A semiclassical theory of small oscillations is developed for nuclei that are subject to velocity-
dependent forces in addition to the usual interatomic forces. When the velocity-dependent …

Ground state and polarization of a hydrogenlike atom near a Weyl semimetal

JD Castaño-Yepes, DJ Nader, A Martín-Ruiz - Physical Review A, 2023 - APS
In this paper we study the effects of a topological Weyl semimetal (WSM) upon the ground
state and polarization of a hydrogen-like atom near its surface. The WSM is assumed to be …