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Fundamental antenna limits of the gain-bandwidth product are derived from polarizability calculations. This electrostatic technique has significant value in many antenna evaluations. Polarizability is not available in closed form for most…

光学 · 物理学 2014-02-18 Morteza Shahpari , David V. Thiel , Andrew Lewis

We propose a first-principles method of efficiently evaluating electron-transport properties of very long systems. Implementing the recursive Green's function method and the shifted conjugate gradient method in the transport simulator based…

介观与纳米尺度物理 · 物理学 2021-01-20 Yoshiyuki Egami , Shigeru Tsukamoto , Tomoya Ono

Environmental noise usually hinders the efficiency of charge transport through coherent quantum systems; an exception is dephasing-assisted transport (DAT). We show that linear triple quantum dots in a transport configuration and subjected…

介观与纳米尺度物理 · 物理学 2014-11-25 L. D. Contreras-Pulido , M. Bruderer , S. F. Huelga , M. B. Plenio

We study the conservative and deterministic dynamics of two nonlinearly interacting particles evolving in a one-dimensional spatially periodic washboard potential. A weak tilt of the washboard potential is applied biasing one direction for…

统计力学 · 物理学 2011-02-07 D. Hennig , A. D. Burbanks , A. H. Osbaldestin

Recent developments on studies of transport through quantum dots obtained by applying the time-dependent density matrix renormalization group method are summarized. Some new aspects of Kondo physics which appear in nonequilibrium steady…

强关联电子 · 物理学 2015-05-28 Shunsuke Kirino , Kazuo Ueda

Electron transport through a single-level quantum dot weakly coupled to Luttinger liquid leads is considered in the master equation approach. It is shown that for a weak or moderately strong interaction the differential conductance…

强关联电子 · 物理学 2013-02-06 G. A. Skorobagatko , I. V. Krive

Electron transport properties in a parallel double-quantum-dot structure with three-terminals are theoretically studied. By introducing a local Rashba spin-orbit coupling, we find that an incident electron from one terminal can select a…

介观与纳米尺度物理 · 物理学 2009-11-13 Weijiang Gong , Yisong Zheng

We describe linear and nonlinear transport across a single impurity Anderson model quantum dot with intermediate coupling to the leads, i.e., with tunnel coupling of the order of the thermal energy k_B T. The coupling is large enough that…

介观与纳米尺度物理 · 物理学 2015-06-11 Johannes Kern , Milena Grifoni

We consider the problem of electron transport along a one-dimensional disordered multiple-scattering conductor, and study the electron density for all the electronic levels. A model is proposed for the reduced density matrix of the system…

无序系统与神经网络 · 物理学 2023-03-14 Gerardo Rivas , Miztli Yepez , Pier A. Mello

Thermal Radiative Transfer (TRT) is the dominant energy transfer mechanism in high-energy density physics with applications in inertial confinement fusion and astrophysics. The stiff interactions between the material and radiation fields…

计算物理 · 物理学 2019-05-01 Hans Hammer , HyeongKae Park , Luis Chacon

We consider the problem of an atomic beam propagating quantum mechanically through an atom beam splitter. Casting the problem in an adiabatic representation (in the spirit of the Born-Oppenheimer approximation in molecular physics) sheds…

原子物理 · 物理学 2009-11-10 Daniele C. E. Bortolotti , John L. Bohn

The electron and photon transport processes in spectroscopy techniques described by the invariant embedding theory is here revisited. We report a convergence method to obtain closed analytical solutions to the 3D integro-differential…

材料科学 · 物理学 2010-06-22 Carlos Figueroa , Horacio Brizuela , Silvia P. Heluani

This paper introduces a communication method that can use one information symbol to provide two sets of the independent bits to two receivers in spatial perpendicular directions. The new communication scheme is realized by switching one…

信号处理 · 电气工程与系统科学 2019-11-06 Bingli Jiao

We investigate different methods to compute the DC conductance in a quantum wire doped with some impuritied by exploiting the integrability of the theories under consideration. As an essential ingredient in all methods we evaluate the…

凝聚态物理 · 物理学 2007-05-23 Olalla A. Castro-Alvaredo , Andreas Fring

In this work, we investigate numerically the transport properties of a 2D complex plasma crystal using diffusion of coplanar dust lattice waves. In the limit where the Hamiltonian interactions can be decoupled from the non-Hamiltonian…

等离子体物理 · 物理学 2018-01-04 E G Kostadinova , A Cameron , F Guyton , K Busse , C D Liaw , L S Matthews , T W Hyde

In this work, we propose a novel machine learning approach to compute the optimal transport map between two continuous distributions from their unpaired samples, based on the DeepParticle methods. The proposed method leads to a min-min…

机器学习 · 统计学 2025-07-01 Yingyuan Li , Aokun Wang , Zhongjian Wang

Using matter waves that are trapped in a deep optical lattice, dissipationless directed transport is demonstrated to occur if the single-band quantum dynamics is periodically tilted on one half of the lattice by a monochromatic field. Most…

其他凝聚态物理 · 物理学 2009-11-13 Jiangbin Gong , Dario Poletti , Peter Hanggi

We propose a technique for interpolating between probability distributions on discrete surfaces, based on the theory of optimal transport. Unlike previous attempts that use linear programming, our method is based on a dynamical formulation…

偏微分方程分析 · 数学 2018-09-20 Hugo Lavenant , Sebastian Claici , Edward Chien , Justin Solomon

We develop the `duality approach', that has been extensively studied for classical models of transport, for quantum systems in contact with a thermal `Lindbladian' bath. The method provides (a) a mapping of the original model to a simpler…

统计力学 · 物理学 2021-06-09 Rouven Frassek , Cristian Giardinà , Jorge Kurchan

We consider a discrete random walk on a diagonal lattice in two and three dimensions and obtain explicit solutions of absorption probabilities and probabilities of return in several domains. In three dimensions we consider both the cube and…

概率论 · 数学 2021-07-15 T. J. van Uem