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We analyze the role of a Rayleigh surface phonon mode in the electron-phonon interaction at the surface of a 3D topological insulator. A strong renormalization of the phonon dispersion, leading eventually to the disappearance of Rayleigh…

介观与纳米尺度物理 · 物理学 2015-06-16 Vincenzo Parente , Arturo Tagliacozzo , Felix von Oppen , Francisco Guinea

We propose and study a spin-orbit interaction based mechanism to actively cool down the torsional vibration of a nanomechanical resonator made by semiconductor materials. We show that the spin-orbit interactions of electrons can induce a…

介观与纳米尺度物理 · 物理学 2015-05-13 Nan Zhao , D. L. Zhou , Jia-Lin Zhu , C. P. Sun

The dynamics of gyrotropic vortex motion in a thin circular nanodisk of soft ferromagnetic material is considered. The demagnetization field is calculated using two-dimensional Green's functions for the thin film problem and fast Fourier…

统计力学 · 物理学 2013-05-08 G. M. Wysin , W. Figueiredo

Graphene bilayers display peculiar electronic and mechanical characteristics associated to their two-dimensional character and relative disposition of the sheets. Here we study nuclear quantum effects in graphene bilayers by using…

材料科学 · 物理学 2019-06-17 Carlos P. Herrero , Rafael Ramirez

Using micromagnetic simulations, we have investigated spin dynamics in a spin-valve bi-layer in the presence of a thermal gradient. The direction and the intensity of the gradient allow to excite the spin wave modes of each layer…

介观与纳米尺度物理 · 物理学 2015-06-16 Simone Borlenghi , Weiwei Wang , Hans Fangohr , Lars Bergqvist , Anna Delin

Comprehending sound damping is integral to understanding the anomalous low temperature properties of glasses. After decades of theoretical and experimental studies, Rayleigh scattering scaling of the sound attenuation coefficient with…

无序系统与神经网络 · 物理学 2025-04-23 Elijah Flenner , Grzegorz Szamel

The ability to induce, observe and control quantum coherent interactions in room temperature, electrically driven optoelectronic devices is of outmost significance for advancing quantum science and engineering towards practical…

We numerically model experiments in which large-scale vortex rings - bundles of quantized vortex loops - are created in superfluid helium by a piston-cylinder arrangement. We show that the presence of a normal fluid vortex ring together…

流体动力学 · 物理学 2015-06-23 Daniel H. Wacks , Andrew W. Baggaley , Carlo F. Barenghi

We study the sedimentation of finite-size inertial particles in a Rayleigh-Taylor-like setup using state-of-the-art direct numerical simulations. The falling particles are observed to produce two distinct regions: a leading mixing layer…

流体动力学 · 物理学 2026-01-28 Simone Tandurella , Marco Edoardo Rosti , Stefano Musacchio , Guido Boffetta

Surface acoustic waves at frequencies beyond a few GHz are promising components for quantum technology applications. Applying scanning X-ray diffraction microcopy we directly map the locally resolved components of the three-dimensional…

介观与纳米尺度物理 · 物理学 2023-06-05 M. Hanke , N. Ashurbekov , E. Zatterin , M. E. Msall , J. Hellemann , P. V. Santos , T. U. Schulli , S. Ludwig

We study the temporal evolution of entanglement pertaining to two qubits interacting with a thermal bath. In particular we consider the simplest nontrivial spin bath models where symmetry breaking occurs and treat them by mean field…

量子物理 · 物理学 2009-11-10 Marco Lucamarini , Simone Paganelli , Stefano Mancini

We present here algorithmic cooling (via polarization-heat-bath)- a powerful method for obtaining a large number of highly polarized spins in liquid nuclear-spin systems at finite temperature. Given that spin-half states represent (quantum)…

量子物理 · 物理学 2009-11-07 P. Oscar Boykin , Tal Mor , Vwani Roychowdhury , Farrokh Vatan , Rutger Vrijen

We propose a definition of vorticity at inverse temperature \beta for Gibbs states in quantum XY spin systems on the lattice by testing \exp[-\beta H] on a complete set of observables ("one-point functions"). We show in particular that it…

数学物理 · 物理学 2015-04-07 Dimitri Minenkov , Michel Rouleux

Quantum turbulence (QT) generated by the Rayleigh-Taylor instability in binary immiscible ultracold 87Rb atoms at zero temperature is studied theoretically. We show that the quantum vortex tangle is qualitatively different from previously…

量子气体 · 物理学 2014-02-05 D. Kobyakov , A. Bezett , E. Lundh , M. Marklund , V. Bychkov

We discuss the long-time relaxation of a qubit linearly coupled to a finite bath of $N$ spins (two-level systems, TLSs), with the interaction Hamiltonian in rotating wave approximation. We focus on the regime $N\gg 1$, assuming that the…

量子物理 · 物理学 2023-07-26 Jukka P. Pekola , Bayan Karimi , Marco Cattaneo , Sabrina Maniscalco

Rotational superradiance was predicted theoretically decades ago, and is chiefly responsible for a number of important effects and phenomenology in black-hole physics. However, rotational superradiance has never been observed…

广义相对论与量子宇宙学 · 物理学 2017-01-02 Vitor Cardoso , Antonin Coutant , Mauricio Richartz , Silke Weinfurtner

We determine numerically the steady-state spectrum for Kelvin waves on a superfluid 4He vortex that is driven by shaking its end points and damped by mutual friction. The relaxation rate towards a steady state is determined by the mutual…

其他凝聚态物理 · 物理学 2012-04-24 R. Hänninen

Transverse spin of surface waves is a universal phenomenon which has recently attracted significant attention in optics and acoustics. It appears in gravity water waves, surface plasmon-polaritons, surface acoustic waves, and exhibits…

Exact solutions of a magnetized plasma in a vorticity containing shear flow for constant temperature are presented. This is followed by the modification of these solutions by thermomagnetic currents in the presence of temperature gradients.…

等离子体物理 · 物理学 2010-01-13 Friedwardt Winterberg

The past three decades of investigation on nuclear physics and pulsar astrophysics have seen gradual recognition that elastodynamic approach to the continuum mechanics of nuclear matter provides proper account of macroscopic motions of…

天体物理学 · 物理学 2009-06-23 S. Bastrukov , H-K. Chang , S. Misicu , I. Molodtsova , D. Podgainy