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In this work, we propose a new three-dimensional nonlocal spinor superfield model. This theory is constructed by introducing form factors in the local spinor superfield action. Then, we couple it minimally to a scalar superfield, for which…

高能物理 - 理论 · 物理学 2026-02-23 F. S. Gama , J. R. Nascimento , G. Olmo , A. Yu. Petrov , P. Porfírio

Experiments show that spike-triggered stimulation performed with Bidirectional Brain-Computer-Interfaces (BBCI) can artificially strengthen connections between separate neural sites in motor cortex (MC). What are the neuronal mechanisms…

神经元与认知 · 定量生物学 2017-04-12 Guillaume Lajoie , Nedialko I. Krouchev , John F. Kalaska , Adrienne L. Fairhall , Eberhard E. Fetz

Cyborg in the brain-machine interface field has attracted more attention in recent years. To control a creature via a machine called cyborg method, three stages are considerable: stimulation of neurons, neural response, and the behavioral…

生物物理 · 物理学 2019-05-01 Mohammad Jamali , Yousef Jamali , Mehdi Golshani

We theoretically study the motion of magnetic colloidal particles above a magnetic pattern and compare the predictions with Brownian dynamics simulations. The pattern consists of alternating square domains of positive and negative…

软凝聚态物质 · 物理学 2016-11-01 Daniel de las Heras , Johannes Loehr , Michael Loenne , Thomas M. Fischer

We demonstrate experimental proof of principle for a stirring potential for indirect excitons. The azimuthal wavelength of this stirring potential is set by the electrode periodicity, the amplitude is controlled by the applied AC voltage,…

介观与纳米尺度物理 · 物理学 2015-02-20 M. W. Hasling , Y. Y. Kuznetsova , P. Andreakou , J. R. Leonard , E. V. Calman , C. Dorow , L. V. Butov , M. Hanson , A. C. Gossard

We investigate a quantum many-body system with particles moving on a circle and subject to two-body and three-body potentials. In this new class of models, that extrapolates from the celebrated Calogero-Sutherland model and a system with…

量子物理 · 物理学 2017-11-22 Tarun R. Tummuru , Sudhir R. Jain , Avinash Khare

We theoretically predict that a pure steady state spin-current without charge-current can induce an electric field. A formula for the induced electric field is derived and we investigate its characteristics. Conversely, a moving spin is…

介观与纳米尺度物理 · 物理学 2009-11-10 Qing-feng Sun , Hong Guo , Jian Wang

A general expression of the current induced spin torque in a magnetic layered structure in the presence of external dc or ac voltages is derived in the framework of the scattering matrix approach. A detailed analysis is performed for a…

介观与纳米尺度物理 · 物理学 2010-10-05 F. Romeo , R. Citro

The excitation of wakefields by a triangular temporal profile laser pulse with an abrupt fall in a step density profile plasma channel is investigated analytically and an exact solution is obtained. The excitation is more efficient for…

等离子体物理 · 物理学 2007-05-23 R. Annou , V. K. Tripathi

Neuronal models based on the Hodgkin-Huxley equation form a fundamental framework in the field of computational neuroscience. While the neuronal state is often modeled deterministically, experimental recordings show stochastic fluctuations,…

神经元与认知 · 定量生物学 2018-10-26 Pavol Bauer , Stefan Engblom , Sanja Mikulovic , Aleksandar Senek

Different propulsion mechanisms have been suggested for describing the motion of a variety of chemical micromotors, including the bubble-recoil mechanism, which has attracted great attention in the last decades due to its high efficiency…

化学物理 · 物理学 2020-10-19 Paul Wrede , Mariana Medina-Sánchez , Vladimir M. Fomin , Oliver G. Schmidt

Current-induced excitations in bilayer magnetic nanopillars have been studied with large magnetic fields applied perpendicular to the layers at low temperature. Junctions investigated all have Cu/Co/Cu/Co/Cu as core layer stacks. Two types…

介观与纳米尺度物理 · 物理学 2007-09-14 Wenyu Chen , Andrew D. Kent , M. J. Rooks , N. Ruiz , Jonathan Z. Sun

We present a theoretical investigation of the excitation of multiple electrostatic wakefields by the ponderomotive force of a short electromagnetic pulse propagating through a dense plasma. It is found that the inclusion of the quantum…

等离子体物理 · 物理学 2015-05-13 P. K. Shukla , G. Brodin , M. Marklund , L. Stenflo

The use of small amplitude electric currents delivered through the scalp, termed transcranial current stimulation (tCS, tDCS / tACS when using DC / AC currents) holds considerable promise for developing safe and effective treatments for…

神经元与认知 · 定量生物学 2024-10-10 Julien Modolo , Mengsen Zhang , Joan Duprez , Flavio Frohlich

Expressions for intermolecular forces and torques, derived from pair potentials between rigid non-spherical units, are presented. The aim is to give compact and clear expressions, which are easily generalised, and which minimise the risk of…

统计力学 · 物理学 2013-03-19 Michael P. Allen , Guido Germano

A complete single-neuron model must correctly reproduce the firing of spikes and bursts. We present a study of a simplified model of deep pyramidal cells of the cortex with active dendrites. We hypothesized that we can model the soma and…

神经元与认知 · 定量生物学 2013-12-04 Richard Naud , Brice Bathellier , Wulfram Gerstner

We perform 3D micromagnetic simulations of current-driven magnetization dynamics in nanoscale exchange biased spin-valves that take account of (i) back action of spin-transfer torque on the pinned layer, (ii) non-linear damping and (iii)…

介观与纳米尺度物理 · 物理学 2009-11-13 G. Siracusano , G. Finocchio , I. N. Krivorotov , L. Torres , G. Consolo , B. Azzerboni

In an earlier paper, we introduced a model for pulsars in which non-radial oscillations of high spherical degree (\el) aligned to the magnetic axis of a spinning neutron star were able to reproduce subpulses like those observed in…

天体物理学 · 物理学 2009-11-13 J. Christopher Clemens , R. Rosen

The thesis explores calculating tunneling current densities between planar conducting electrodes in an STM. It considers factors like bias voltages and the separation between electrodes, using Fermi energy and work functions. Pauli blocking…

其他凝聚态物理 · 物理学 2024-02-02 Malati Dessai

We provide a detailed theoretical analysis of molecular rotational excitation by a chiral pulse train -- a sequence of linearly polarised pulses with the polarisation direction rotating from pulse to pulse by a controllable angle. Molecular…

量子物理 · 物理学 2013-05-30 Johannes Floß , Ilya Sh. Averbukh