Results 41 to 50 of about 20,882 (199)

Quantum impurities: from mobile Josephson junctions to depletons

New Journal of Physics, 2016
We overview the main features of mobile impurities moving in one-dimensional superfluid backgrounds by modeling it as a mobile Josephson junction, which leads naturally to the periodic dispersion of the impurity.
Michael Schecter, Dimitri M Gangardt, Alex Kamenev   +2 more
doaj   +1 more source

First and second sound of a unitary Fermi gas in highly oblate harmonic traps

New Journal of Physics, 2014
We theoretically investigate first and second sound modes of a unitary Fermi gas trapped in a highly oblate harmonic trap at finite temperatures. Following the idea by Stringari and co-workers (2010 Phys. Rev. Lett.
Hui Hu, Paul Dyke, Chris J Vale, Xia-Ji Liu   +3 more
doaj   +1 more source

Distribution of components of jewelry alloy in the bulk of metal castings [PDF]

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2018
The process is investigated of stratification of a quaternary jewelry alloy within the height of a vertical metal crucible. The concentration distribution of the alloy components near the surface of castings, as well as the features of the structure ...
N.P. Uglev, I.N. Zamorin, S.N. Uglev, S.A. Smirnov, A.M. Selivanov   +4 more
doaj   +1 more source

Engineering Superfluidity in Electron-Hole Double Layers

, 1997
We show that band-structure effects are likely to prevent superfluidity in semiconductor electron-hole double-layer systems. We suggest the possibility that superfluidity could be realized by the application of uniaxial pressure perpendicular to the ...
A. H. MacDonald, B. E. Kane, C. Comte, D. Jerome, F. Rapisarda, G. Vignale, G. Vignale, Giovanni Vignale, J. A. Kash, J. Zittartz, K. S. Singwi, L. C. Andreani, L. V. Keldysh, Lian Zheng, M. Altarelli, S. I. Shevchenko, S. I. Shevchenko, Sergio Conti, T. Fukuzawa, U. Sivan, Xuejun Zhu, Y. Naveh, Yu E. Lozovik, Yu. E. Lozovik, Yu. E. Lozovik, Z. W. Gortel   +25 more
core   +1 more source

Nonrelativistic Superfluids in Cosmology from a Relativistic Approach: Revisiting Two Formulations of Superfluidity

Universe
Two formulations of superfluidity are reviewed: Landau’s phenomenological two-fluid model and a relativistic effective field theory description.
Aline Favero, Heliudson Bernardo
doaj   +1 more source

Miscibility Regimes in a ²³Na–³⁹K Quantum Mixture

Applied Sciences, 2021
The effects of miscibility in interacting two-component classical fluids are relevant in a broad range of daily applications. When considering quantum systems, two-component Bose–Einstein condensates provide a well-controlled platform where the miscible ...
Emmanuel Mercado Gutierrez, Gustavo Alves de Oliveira, Kilvia Mayre Farias, Vanderlei Salvador Bagnato, Patricia Christina Marques Castilho   +4 more
doaj   +1 more source

Topological Point Defects in SmC* Liquid Crystals Under Mechanical Disturbance

Advanced Materials Interfaces, EarlyView.
Tangetial air jet shear inducess island formation and nucleates topological point defects in uniform SmC films. Island bounded by edge dislocation loops shrink and transform into isolated point defects under continued shear. Mechanical perturbatio provides a controllable route for defect engineering in smectric liquid crystal thin films.
Gunganist Kongklad, Vandana Molahalli, Apichart Pattanaporkratana, Nattaporn Chattham   +3 more
wiley   +1 more source

Nonlinear Phenomena of Ultracold Atomic Gases in Optical Lattices: Emergence of Novel Features in Extended States

Entropy, 2016
The system of a cold atomic gas in an optical lattice is governed by two factors: nonlinearity originating from the interparticle interaction, and the periodicity of the system set by the lattice. The high level of controllability associated with such an
Gentaro Watanabe, B. Prasanna Venkatesh, Raka Dasgupta   +2 more
doaj   +1 more source

Spin Dynamics of Excitons and Carriers in Mixed‐Cation MAxFA1–xPbI3 Perovskite Crystals: Alloy Fluctuations Probed by Optical Orientation

Advanced Physics Research, EarlyView.
The impact of alloy fluctuations on the spin dynamics of mixed‐cation MAxFA1‐xPbI3 perovskite single crystals is studied experimentally by means of polarized time‐resolved photoluminescence. The high optical orientation degree, reaching 80% for x = 0.1 and 0.8, displays a minimum of 60% for x = 0.4.
Boris F. Gribakin, Nataliia E. Kopteva, Dmitri R. Yakovlev, Ilya A. Akimov, Ina V. Kalitukha, Bekir Turedi, Maksym V. Kovalenko, Manfred Bayer   +7 more
wiley   +1 more source

Self-consistent approach for Bose-condensed atoms in optical lattices

Condensed Matter Physics, 2013
Bose atoms in optical lattices are considered at low temperatures and weak interactions, when Bose-Einstein condensate is formed. A self-consistent approach, based on the use of a representative statistical ensemble, is employed, guaranteeing a gapless ...
V.I. Yukalov
doaj   +1 more source