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On the proper timescale, amorphous solids can flow. Solid flow can be observed macroscopically in glaciers or lead pipes, but it can also be artificially enhanced by creating defects. Ion Beam Sputtering (IBS) is a technique in which ions…

Materials Science · Physics 2012-03-07 Mario Castro , Rodolfo Cuerno

We reveal that lattice interfaces imprinted in nonlocal nonlinear media support surface solitons that do not exist in other similar settings, including interfaces of local and nonlocal uniform materials. We show the impact of nonlocality on…

Optics · Physics 2009-11-11 Yaroslav V. Kartashov , Victor A. Vysloukh , Lluis Torner

We show that the electric dipole-dipole interaction between a pair of polar molecules undergoes an all-out transformation when superimposed by a far-off resonant optical field. The combined interaction potential becomes tunable by variation…

Atomic Physics · Physics 2015-05-30 Mikhail Lemeshko , Bretislav Friedrich

It has been conjectured that roughness plays a role in surface nucleation, the tendency for freezing to begin preferentially at the liquid-gas interface. Using high speed imaging, we sought evidence for freezing at the contact line on…

Soft Condensed Matter · Physics 2015-06-23 C. W. Gurganus , J. C. Charnawskas , A. B. Kostinski , R. A. Shaw

I use the method of classical density-functional theory in the weighted-density approximation of Tarazona to investigate the phase diagram and the interface structure of a two-dimensional lattice-gas model with three phases -- vapour,…

Statistical Mechanics · Physics 2009-11-10 S. Prestipino

We study the global influence of curvature on the free energy landscape of two-dimensional binary mixtures confined on closed surfaces. Starting from a generic effective free energy, constructed on the basis of symmetry considerations and…

Soft Condensed Matter · Physics 2019-09-11 Piermarco Fonda , Melissa Rinaldin , Daniela J. Kraft , Luca Giomi

Quantum degenerate cold-atom gases provide a remarkable opportunity to study strongly interacting systems. Recent experimental progress in producing ultracold polar molecules with a net electric dipole moment opens up new possibilities to…

Quantum Gases · Physics 2010-12-16 Roman M. Lutchyn , Enrico Rossi , S. Das Sarma

We consider a dipolar Bose-Einstein condensate trapped in an array of two-well systems with an arbitrary orientations of the dipoles relative to the system's axis. The system can be built as a chain of local traps sliced into two parallel…

Quantum Gases · Physics 2017-04-05 Zhiwei Fan , Yuhan Shi , Yan Liu , Wei Pang , Yongyao Li , Boris A. Malomed

By employing brute-force molecular dynamics, umbrella sampling, and seeding simulations, we investigate homogeneous nucleation during melting and freezing of hard spheres. We provide insights into these opposing phase transitions from the…

Soft Condensed Matter · Physics 2024-04-16 Willem Gispen , Marjolein Dijkstra

Solid particles in protoplanetary discs can grow by direct vapour deposition outside of ice lines. The presence of microscopic silicate particles may nevertheless hinder growth into large pebbles, since the available vapour is deposited…

Earth and Planetary Astrophysics · Physics 2019-09-11 Katrin Ros , Anders Johansen , Ilona Riipinen , Daniel Schlesinger

It is shown that the dipole moment of polar (water, methanol, formamide, acetone and acetonitrile) molecules in the neighborhood of a cation is increased primarily by polarization from the bare electrostatic charge of the cation, although…

Chemical Physics · Physics 2021-03-31 Imre Bakó , Dániel Csókás , István Mayer , Szilvia Pothoczki , László Pusztai

Motivated by the ideas of using cold alkaline earth atoms trapped in an optical lattice for realization of optical atomic clocks, we investigate theoretically the perturbative effects of atom-atom interactions on a clock transition…

Quantum Physics · Physics 2009-11-10 D. E. Chang , Jun Ye , M. D. Lukin

The selection of stacking order in a broad range of close-packed polymorphic materials remains a challenging enigma. Using in situ cryogenic transmission electron microscopy, we uncover the atomistic mechanisms governing the vapour…

We present a computer simulation study on crystal nucleation and growth in supersaturated suspensions of mono-disperse hard spheres induced by a triangular lattice substrate. The main result is that compressed substrates are wet by the…

Soft Condensed Matter · Physics 2012-02-01 Sven Dorosz , Tanja Schilling

It is proposed that the rapid observed homogeneous nucleation of ice dust in a cold, weakly-ionized plasma depends on the formation of hydroxide (OH$^-$) by fast electrons impacting water molecules. These OH$^{-}$ ions attract neutral water…

Plasma Physics · Physics 2022-08-31 Paul M. Bellan

In this paper, effect of dipole-dipole interactions on nonlinear optical properties of the system of randomly located semiconductor nanoparticles embedded in bulk dielectric matrix is investigated. This effect results from the nonzero…

Mesoscale and Nanoscale Physics · Physics 2013-09-12 Andrey V. Panov

Context. Interstellar surface chemistry is a complex process that occurs in icy layers accumulated onto grains of different sizes. Efficiency of surface processes often depends on the immediate environment of adsorbed molecules. Aims. We…

Astrophysics of Galaxies · Physics 2024-07-31 Juris Kalvāns , Aija Kalniņa , Kristaps Veitners

We theoretically investigate the role of the dielectric mismatch between materials on the energy levels and recombination energies of a core-shell nanowire. Our results demonstrate that when the dielectric constant of the core material is…

Mesoscale and Nanoscale Physics · Physics 2012-09-13 A. A. Sousa , T. A. S. Pereira , A. Chaves , J. S. de Sousa , G. A. Farias

We study the checkerboard supersolid of the hard-core Bose-Hubbard model with the dipole-dipole interaction. This supersolid is different from all other supersolids found in lattice models in the sense that superflow paths through which…

Quantum Gases · Physics 2012-09-14 Takahiro Ohgoe , Takahumi Suzuki , Naoki Kawashima

Inter-site dipolar interactions induce, even in absence of disorder, an intriguing non-ergodic dynamics for dipolar bosons in an optical lattice. We show that the inherent dipole-induced density-dependent tunneling, typically neglected,…

Quantum Gases · Physics 2023-03-30 Adith Sai Aramthottil , Mateusz Łącki , Luis Santos , Jakub Zakrzewski
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