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We investigate the properties of highly compressible turbulence, the compressibility arising from a small effective polytropic exponent $\gamma_e$ due to cooling. In the limit of small $\gamma_e$, the density jump at shocks is shown to be…

天体物理学 · 物理学 2009-10-28 E. Vazquez-Semadeni , T. Passot , A. Pouquet

The effects of dynamic localization in a solid-state system -- a quantum dot -- are considered. The theory of weak dynamic localization is developed for non-interacting electrons in a closed quantum dot under arbitrary time-dependent…

介观与纳米尺度物理 · 物理学 2015-06-24 V. E. Kravtsov

Vortex motions are frequently observed on the solar photosphere. These motions may play a key role in the transport of energy and momentum from the lower atmosphere into the upper solar atmosphere, contributing to coronal heating. The lower…

太阳与恒星天体物理 · 物理学 2018-05-02 B. Snow , V. Fedun , F. A. Gent , G. Verth , R. Erdélyi

The plasma of the lower solar atmosphere consists of mostly neutral particles, whereas the upper solar atmosphere is mostly ionised particles and electrons. A shock that propagates upwards in the solar atmosphere therefore undergoes a…

太阳与恒星天体物理 · 物理学 2020-05-27 Ben Snow , Andrew Hillier

We recapitulate the principle enabling the phenomenon of dynamic localization, and provide model calculations for ultracold atoms in driven optical lattices which indicate that the localization effect remains almost unaffected by interband…

量子气体 · 物理学 2015-03-19 Stephan Arlinghaus , Matthias Langemeyer , Martin Holthaus

At high dissipation levels, vortex motion in a superconducting film has been observed to become unstable at a certain critical vortex velocity v*. At substrate temperatures substantially below Tc, the observed behavior can be accounted for…

超导电性 · 物理学 2009-11-11 James M. Knight , Milind N. Kunchur

Bow shocks and related density enhancements produced by the winds of massive stars moving through the interstellar medium provide important information regarding the motions of the stars, the properties of their stellar winds, and the…

太阳与恒星天体物理 · 物理学 2018-04-04 Manisha Shrestha , Hilding R. Neilson , Jennifer L. Hoffman , Richard Ignace

Previous approaches of emergent thermalization for condensed matter based on typical wavefunctions are extended to generate an intrinsically quantum theory of gases. Gases are fundamentally quantum objects at all temperatures, by virtue of…

综合物理 · 物理学 2015-06-29 Clifford Chafin

At temperatures well below their glass transition, the deformation properties of bulk metallic glasses are characterised by a sharp transition from elasticity to plasticity, a reproducible yield stress, and an approximately linear decrease…

软凝聚态物质 · 物理学 2013-11-18 P. M. Derlet , R. Maaß

Departures in phonon heat conduction from diffusion have been extensively observed in nanostructures through their thermal conductivity reduction and largely explained with classical size effects neglecting phonon's wave nature. Here, we…

In the framework of a multisource thermal model, we describe experimental results of the transverse momentum spectra of final-state light flavour particles produced in gold-gold (Au-Au), copper-copper (Cu-Cu), lead-lead (Pb-Pb), proton-lead…

核实验 · 物理学 2016-10-26 Hua-Rong Wei , Fu-Hu Liu , Roy A. Lacey

We propose a mechanism for testing the theory of collapse models such as continuous spontaneous localization (CSL) by examining the parametric heating rate of a trapped nanosphere. The random localizations of the centre-of-mass for a given…

量子物理 · 物理学 2016-07-20 Daniel Goldwater , Mauro Paternostro , P. F. Barker

Observations and theory suggest that core-collapse supernovae can span a range of explosion energies, and when sub-energetic, the shockwave initiating the explosion can decelerate to speeds comparable to the escape speed of the progenitor.…

高能天体物理现象 · 物理学 2023-12-06 Daniel A. Paradiso , Eric R. Coughlin , Jonathan Zrake , Dheeraj R. Pasham

The phenomenology of glass-forming liquids is often described in terms of their underlying, high-dimensional potential energy surface. In particular, the statistics of stationary points sampled as a function of temperature provides useful…

统计力学 · 物理学 2021-01-06 Masanari Shimada , Daniele Coslovich , Hideyuki Mizuno , Atsushi Ikeda

An equilibrated model glass-forming liquid is studied by mapping successive configurations produced by molecular dynamics simulation onto a time series of inherent structures (local minima in the potential energy). Using this ``inherent…

软凝聚态物质 · 物理学 2012-03-27 Thomas B. Schroeder , Srikanth Sastry , Jeppe C. Dyre , Sharon C. Glotzer

Supersonic isothermal turbulence establishes a network of transient dense shocks that sweep up material and have a density profile described by balance between ram pressure of the background fluid versus the magnetic and gas pressure…

星系天体物理 · 物理学 2018-08-08 Philip Mocz , Blakesley Burkhart

Atmospheric heat redistribution shapes the remote appearance of rocky exoplanets but there is currently no easy way to predict a planet's heat redistribution from its physical properties. This paper proposes an analytical scaling theory for…

地球与行星天体物理 · 物理学 2022-01-21 Daniel D. B. Koll

We review a series of experimental studies of the thermodynamics of nonequilibrium processes at the microscale. In particular, in these experiments we studied the fluctuations of the thermodynamic properties of a single optically-trapped…

统计力学 · 物理学 2016-06-22 L. Dinis , I. A. Martínez , É. Roldán , J. M. R. Parrondo , R. A. Rica

Any interface boundary in an equilibrium system of Coulomb particles is accompanied by the existence of a finite difference in the average electrostatic potential through this boundary. The discussed interface potential drop is a…

等离子体物理 · 物理学 2009-01-19 Igor Iosilevskiy , Alexander Chigvintsev

It is important to understand the mechanism of high-temperature superconductivity. It is obvious that the interaction with large energy scale is responsible for high critical temperature $T_c$. The Coulomb interaction is one of candidates…

强关联电子 · 物理学 2015-03-13 Takashi Yanagisawa