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This paper describes new modeling capabilities for predicting H-mode pedestal profiles in spherical tokamaks. Temperature profiles for NSTX discharges 132543 and 132588 are modeled by coupling the \textsc{astra} transport solver with…

等离子体物理 · 物理学 2026-03-24 P. -Y. Li , D. R. Hatch , L. A. Leppin , J. Schmidt , J. F. Parisi , M. Lampert , M. Kotschenreuther , S. M. Mahajan

We present a model for electron-ion transport in Warm Dense Matter that incorporates Coulomb coupling effects into the quantum Boltzmann equation of Uehling and Uhlenbeck through the use of a statistical potential of mean force. Although…

等离子体物理 · 物理学 2021-06-23 Shane Rightley , S. D. Baalrud

We present the theory of nonzero temperature ($T$) spin dynamics and transport in one-dimensional Heisenberg antiferromagnets with an energy gap $\Delta$. For $T << \Delta$, we develop a semiclassical picture of thermally excited particles.…

强关联电子 · 物理学 2007-05-23 Kedar Damle , Subir Sachdev

The energy dissipation of quasiclassical homogeneous turbulence in superfluid $^4$He (He II) is controlled by an effective kinematic viscosity $\nu'$, which relates the energy decay rate $dE/dt$ to the density of quantized vortex lines $L$…

其他凝聚态物理 · 物理学 2020-02-04 J. Gao , W. Guo , W. F. Vinen

We discuss the thermodynamics of a non-relativistic gas of bosons with a local repulsive interaction. In particular, we compute the temperature and density dependence of pressure, energy and entropy-density, superfluid and…

量子气体 · 物理学 2009-06-12 S. Floerchinger , C. Wetterich

We consider the scaling of thermal transport in the presence of electric and magnetic fields near the finite temperature transition from the metallic normal state to the superconductor. We do so with fully relaxational, model A, dynamics…

超导电性 · 物理学 2007-05-23 Iddo Ussishkin , David A. Huse , S. L. Sondhi

This work covers an ab initio calculation of thermodynamic, transport, and optical properties of plastics of the effective composition CH$_2$ at density 0.954 g/cm$^3$ in the temperature range from 5 kK up to 100 kK. The calculation is…

材料科学 · 物理学 2016-07-20 D. V. Knyazev , P. R. Levashov

For applications to sensor design, the product nxmu of the electron density n and the mobility mu is a key parameter to be optimized for enhanced device sensitivity. We model the carrier mobility in a two dimensional electron gas (2DEG)…

材料科学 · 物理学 2007-05-23 Y. Shao , S. A. Solin , L. R. Ram-Mohan

We study the thermodynamics near the generic (density-driven) superfluid--Mott-insulator transition in the three-dimensional Bose-Hubbard model using the nonperturbative renormalization-group approach. At low energy the physics is…

量子气体 · 物理学 2012-11-28 A. Rancon , N. Dupuis

We investigate the non-linear transport processes and hydrodynamization of a system of gluons undergoing longitudinal boost-invariant expansion. The dynamics is described within the framework of the Boltzmann equation in the small-angle…

高能物理 - 唯象学 · 物理学 2021-03-24 A. Behtash , S. Kamata , M. Martinez , T. Schaefer , V. Skokov

The description of molecular motion by macroscopic hydrodynamics has a long and continuing history. The Stokes-Einstein relation between the diffusion coefficient of a solute and the solvent viscosity predicted using macroscopic continuum…

无序系统与神经网络 · 物理学 2007-05-23 Xiaoyu Xia , Peter G. Wolynes

We study a quasi-two-dimensional electrostatic drift kinetic system as a model for near-marginal ion temperature gradient (ITG) driven turbulence. A proof is given of the nonlinear stability of this system under conditions of linear…

等离子体物理 · 物理学 2015-04-16 G. G. Plunk

The temperature dependence of the charge carrier density, mobility and Seebeck coefficient of melt-grown, bulk ZnGa2O4 single crystals was measured between 10 K and 310 K. The electrical conductivity at room temperature is about s = 286…

材料科学 · 物理学 2020-05-07 Johannes Boy , Martin Handwerg , Rüdiger Mitdank , Zbigniew Galazka , Saskia F. Fischer

Due to the coexistence of many emergent phenomena, including 2D superconductivity and a large Rashba spin-orbit coupling, 5d transition metal oxides based two-dimensional electron systems (2DESs) have been prospected as one of the potential…

材料科学 · 物理学 2022-10-24 H. Yan , S. W. Zeng , K. Rubi , G. J. Omar , Z. T. Zhang , M. Goiran , W. Escoffier , A. Ariando

Cu2Se and Cu2S are excellent model systems of superionic conductors with large diffusion coefficients that have been reported to exhibit different solid-liquid-like Cu-ion diffusion. In this paper, we clarify the atomic dynamics of these…

We study the transport coefficients of Quark-Gluon-Plasma in finite temperature and finite baryon density. We use AdS/QCD of charged AdS black hole background with bulk-filling branes identifying the U(1) charge as the baryon number. We…

高能物理 - 理论 · 物理学 2008-12-25 Xian-Hui Ge , Yoshinori Matsuo , Fu-Wen Shu , Sang-Jin Sin , Takuya Tsukioka

We study the transport and the relaxation properties of a molecular supercooled liquid by molecular-dynamics numerical simulations. The focus is on the translational motion. Jump motion is detected. At lower temperature the Stokes-Einstein…

统计力学 · 物理学 2007-05-23 Cristiano De Michele , Dino Leporini

Transport is one of the most important physical processes in all energy and length scales. Ideal gases and hydrodynamics are, respectively, two opposite limits of transport. Here, we present an unexpected mathematical connection between…

量子气体 · 物理学 2021-12-13 Zhe-Yu Shi , Chao Gao , Hui Zhai

Nonintegrability plays a crucial role in thermalization and transport processes in many-body Hamiltonian systems, yet its quantitative effects remain unclear. To reveal the connection between the macroscopic relaxation properties and the…

统计力学 · 物理学 2023-10-20 Weicheng Fu , Zhen Wang , Yisen Wang , Yong Zhang , Hong Zhao

We describe the nature of charge transport at non-zero temperatures ($T$) above the two-dimensional ($d$) superfluid-insulator quantum critical point. We argue that the transport is characterized by inelastic collisions among thermally…

强关联电子 · 物理学 2009-10-30 Kedar Damle , Subir Sachdev