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The classic Kob-Andersen (KA) binary Lennard-Jones mixtures which are designed to prevent crystallization has been extensively studied in simulation of slow dynamics. Although crystallization can occur if a liquid system is cooled slowly,…

Soft Condensed Matter · Physics 2017-03-10 Penghui Cao

We introduce, analyze, and compare two novel methods of Single Photon Cooling that generically cool and compress molecular gases. The first method compresses the molecular gas density by three orders of magnitude and increases collision…

Chemical Physics · Physics 2012-05-07 Yuval Shagam , Edvardas Narevicius

The first luminous objects in the concordance cosmology form by molecular hydrogen cooling in dark matter dominated halos of masses ~10^6 M_sun. We use Eulerian adaptive mesh refinement simulations to demonstrate that in the presence of a…

Astrophysics · Physics 2009-11-13 John H. Wise , Tom Abel

We report relaxation dynamics of glycerol-water mixtures as probed by megahertz-to-terahertz dielectric spectroscopy in a frequency range from 50 MHz to 0.5 THz at room temperature. The dielectric relaxation spectra reveal several…

Chemical Physics · Physics 2019-09-04 Ali Charkhesht , Djamila Lou , Ben Sindle , Chengyuan Wen , Shengfeng Cheng , Nguyen Q. Vinh

Structuring of DNA counterions around the double helix has been studied by the molecular dynamics method. A DNA dodecamer d(CGCGAATTCGCG) in water solution with the alkali metal counterions Na$^{+}$, K$^{+}$, and Cs$^{+}$ has been…

Biomolecules · Quantitative Biology 2015-03-19 O. O. Liubysh , A. V. Vlasiuk , S. M. Perepelytsya

We report a study of DNA (150 bp fragments) conformations in very low added salt $<0.05$mM, across wide DNA concentration range $0.0015\leq c \leq 8$~mM (bp). We found an intermediate DNA conformation in the region $0.05 < c < 1$~mM, by…

We combine the swap Monte Carlo algorithm to long multi-CPU molecular dynamics simulations to analyse the equilibrium relaxation dynamics of model supercooled liquids over a time window covering ten orders of magnitude for temperatures down…

Soft Condensed Matter · Physics 2022-12-16 Camille Scalliet , Benjamin Guiselin , Ludovic Berthier

Deep saline aquifers are one of the best options for large-scale and long-term hydrogen storage. Predicting the diffusion coefficient of hydrogen molecules at the conditions of saline aquifers is critical for modelling hydrogen storage. The…

The cross section of dipole-magnetic photodisintegration of the negative hydrogen ion has been calculated within the framework of an effective-range theory. The dipole-magnetic cross section of photodetachment within the very narrow range…

Atomic Physics · Physics 2015-06-17 Arkadiy S. Baltenkov

We use global three dimensional radiation magneto-hydrodynamic simulations to study the properties of inner regions of accretion disks around a 5\times 10^8 solar mass black hole with mass accretion rates reaching 7% and 20% of the…

High Energy Astrophysical Phenomena · Physics 2020-01-08 Yan-Fei Jiang , Omer Blaes , James Stone , Shane W. Davis

Background: Exotic non-spherical nuclear pasta shapes are expected in nuclear matter at just below saturation density because of competition between short range nuclear attraction and long range Coulomb repulsion. Purpose: We explore the…

Nuclear Theory · Physics 2015-07-01 M. E. Caplan , A. S. Schneider , C. J. Horowitz , D. K. Berry

The ultraviolet (UV) photodissociation of amorphous water ice at different ice temperatures is investigated using molecular dynamics (MD) simulations and analytical potentials. Previous MD calculations of UV photodissociation of amorphous…

Chemical Physics · Physics 2010-05-21 C. Arasa , S. Andersson , H. M. Cuppen , E. F. van Dishoweck , G. -J. Kroes

Chemical crosslinking of collagen is a general strategy to reproduce macroscale tissue properties in physiological environment. However, simultaneous control of protein conformation, material properties and biofunctionality is highly…

Chemical Physics · Physics 2013-08-27 Giuseppe Tronci , Amanda Doyle , Stephen J. Russell , David J. Wood

When DNA molecules are heated they denature. This occurs locally so that loops of molten single DNA strands form, connected by intact double-stranded DNA pieces. The properties of this "melting" transition have been intensively…

Biological Physics · Physics 2015-06-29 E. Werner , M. Reiter-Schad , T. Ambjörnsson , B. Mehlig

The momentum distribution of the protons in ice Ih, ice VI, high density amorphous ice and water in carbon nanotubes at low temperatures has been measured using deep inelastic neutron scattering. We find that the momentum distribution for…

The control over DNA elongation in nanofluidic devices holds great potential for large-scale genomic analysis. So far, the manipulation of DNA in nanochannels has been mostly carried out with electrophoresis and seldom with hydrodynamics,…

Building on our previous hydrodynamic study of the angular momenta of cloud cores formed during gravitational collapse of star-forming molecular gas in our previous work, we now examine core properties assuming ideal magnetohydrodynamics…

Solar and Stellar Astrophysics · Physics 2020-04-29 Aleksandra Kuznetsova , Lee Hartmann , Fabian Heitsch

We reanalyze the cosmological constraints on the existence of a net universal lepton asymmetry and neutrino degeneracy. We show that neutrinos can begin to decouple at higher temperatures than previous estimates due to several corrections…

Astrophysics · Physics 2007-05-23 M. Orito , T. Kajino , G. J. Mathews , R. N. Boyd

We present new cooling sequences, color-magnitude diagrams, and color-color diagrams for cool white dwarfs with pure hydrogen atmospheres down to an effective temperature $\te=1500$ K. We include a more detailed treatment of the physics of…

Astrophysics · Physics 2009-10-31 Gilles Chabrier , Pierre Brassard , Gilles Fontaine , Didier Saumon

Recent observations have found several candidates for old warm neutron stars whose surface temperatures are above the prediction of the standard neutron star cooling scenario, and thus require some heating mechanism. Motivated by these…

High Energy Astrophysical Phenomena · Physics 2020-02-20 Keisuke Yanagi , Natsumi Nagata , Koichi Hamaguchi