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Structure of cold dense matter at subnuclear densities is investigated by quantum molecular dynamics (QMD) simulations. We succeeded in showing that the phases with slab-like and rod-like nuclei etc. can be formed dynamically from hot…

核理论 · 物理学 2007-05-23 Gentaro Watanabe , Katsuhiko Sato , Kenji Yasuoka , Toshikazu Ebisuzaki

The effects of the existence of exotic nuclear shapes at the bottom of the neutron star inner crust - nuclear `pasta' - on observational phenomena are estimated by comparing the limiting cases that those phases have a vanishing shear…

太阳与恒星天体物理 · 物理学 2015-05-28 M. Gearheart , W. G. Newton , J. Hooker , Bao-An Li

Using first-principles molecular dynamics, we study the influence of nuclear quantum effects (NQEs) and nonlocal exchange--correlation density functionals (DFs) near molecular dissociation in liquid hydrogen. NQEs strongly influence…

材料科学 · 物理学 2013-03-28 M. A. Morales , J. M. McMahon , C. Pierleoni , D. M. Ceperley

The neutrino oscillation patterns can be modified by neutrino interactions with external environments including electromagnetic fields that can influence on neutrinos in the case neutrinos have nonzero electromagnetic properties [1]. The…

高能物理 - 唯象学 · 物理学 2020-01-01 Konstantin Stankevich , Alexander Studenikin

The Chiral Quark-Soliton model provides the quark and antiquark substructure of the nucleon, which is embedded in nuclear matter. This provides a new way to asses the effects of the nuclear medium on the nucleon. We calculate nuclear…

核理论 · 物理学 2009-09-29 Jason R. Smith

Path-integral molecular dynamics (PIMD) simulations have been carried out to study the influence of quantum dynamics of carbon atoms on the properties of a single graphene layer. Finite-temperature properties were analyzed in the range from…

材料科学 · 物理学 2016-12-23 Carlos P. Herrero , Rafael Ramirez

Geometrical structure of matter at subnuclear densities is investigated in the presence of a degenerate gas of neutrinos as encountered in stellar collapse. The crystalline phases with spherical, cylindrical and planar nuclei as well as…

天体物理学 · 物理学 2009-10-31 Gentaro Watanabe , Kei Iida , Katsuhiko Sato

Molecular crystals often exist in multiple competing polymorphs, showing significantly different physico-chemical properties. Computational crystal structure prediction is key to interpret and guide the search for the most stable or useful…

材料科学 · 物理学 2016-09-16 Mariana Rossi , Piero Gasparotto , Michele Ceriotti

Effects of nuclear dynamics on the energetics of polythiophene relevant for the performance of organic solar cells are studied for the first time. Nuclear motions change the expectation values of frontier orbital energies and the band gap…

化学物理 · 物理学 2016-02-05 Sergei Manzhos

Nuclear scattering events with large momentum transfer in atomic, molecular, or solid-state systems may result in electronic excitations. In the context of atomic scattering by dark matter (DM), this is known as the Migdal effect, but the…

高能物理 - 唯象学 · 物理学 2022-12-28 Carlos Blanco , Ian Harris , Yonatan Kahn , Benjamin Lillard , Jesús Pérez-Ríos

Molecular dynamics simulations are used to model ion and neutral temperature evolution in partially-ionized atmospheric pressure plasma at different ionization fractions. Results show that ion-ion interactions are strongly coupled at…

等离子体物理 · 物理学 2023-01-04 M. D. Acciarri , C. Moore , S. D. Baalrud

Various definitions of the symmetry energy are introduced for nuclei, dilute nuclear matter below saturation density and stellar matter, which is found in compact stars or core-collapse supernovae. The resulting differences are exemplified…

核理论 · 物理学 2015-06-17 S. Typel , H. H. Wolter , G. Röpke , D. Blaschke

Using phenomenological equations of state, we study the chemical and mechanical instabilities in hot isospin-asymmetric nuclear matter. Both instabilities are found to depend strongly on the isospin asymmetry of the nuclear matter. For a…

核理论 · 物理学 2009-10-30 Bao-An Li , C. M. Ko

The mass modifications of the bottomonium states ($\Upsilon (NS)$,$N=1,2,3,4$ and $\Upsilon (1D)$) in magnetized nuclear matter are studied using chiral effective model. The in-medium masses are calculated from the medium modification of…

We consider the impact on cosmological first-order phase transitions (FOPTs) of low-temperature thermal corrections to the effective potential. These are corrections from degrees of freedom whose field-dependent masses in the true vacuum…

高能物理 - 唯象学 · 物理学 2026-03-02 Katharena Christy , James B. Dent , Sumit Ghosh , Jason Kumar , J. O'Thello Ward

We explore the properties of nuclear pasta appearing in supernova matter, i.e., matter at finite temperature with a fixed proton fraction. The pasta phases with a series of geometric shapes are studied using the compressible liquid-drop…

高能天体物理现象 · 物理学 2020-08-05 Fan Ji , Jinniu Hu , Shishao Bao , Hong Shen

Recently, neutral atoms have emerged as a promising platform for quantum computing, offering scalability. In this study, we showcase the realization of atomic qubits in atom-molecular Bose-Einstein condensate, belonging to three distinct…

量子物理 · 物理学 2024-06-04 Leena Barshilia , Rajiuddin Sk , Prasanta K. Panigrahi , Avinash Khare

In recent years, orientationally disordered crystals, or plastic crystals, have transformed the field of solid-state cooling due to the significant latent heat and entropy changes associated with their temperature induced molecular…

We examine the influence of the main approximations employed in density-functional theory descriptions of the solid phase of molecular hydrogen near dissociation. We consider the importance of nuclear quantum effects on equilibrium…

材料科学 · 物理学 2015-06-15 M. A. Morales , J. M. McMahon , C. Pierleoni , D. M. Ceperley

We present an accurate computational study of the electronic structure and lattice dynamics of solid molecular hydrogen at high pressure. The band-gap energies of the $C2/c$, $Pc$, and $P6_3/m$ structures at pressures of 250, 300, and 350…

材料科学 · 物理学 2017-10-27 Sam Azadi , Ranber Singh , T. D. Kühne