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Experiments at Jefferson Laboratory, MIT-Bates, LEGS, Mainz, Bonn, GRAAL, and Spring-8 offer new opportunities to understand in detail how nucleon resonance ($N^*$) properties emerge from the nonperturbative aspects of QCD. Preliminary data…

高能物理 - 格点 · 物理学 2009-01-08 Huey-Wen Lin , Saul D. Cohen , Robert G. Edwards , David G. Richards

Surface plasmons in 2-dimensional electron systems with narrow Bloch bands feature an interesting regime in which Landau damping (dissipation via electron-hole pair excitation) is completely quenched. This surprising behavior is made…

介观与纳米尺度物理 · 物理学 2019-10-14 Cyprian Lewandowski , Leonid Levitov

We investigate the arising of an analogue of the Landau quantization from a background of the violation of the Lorentz symmetry established by a time-like 4-vector and a field configuration of crossed electric and magnetic field. We also…

高能物理 - 理论 · 物理学 2015-07-21 K. Bakke , H. Belich

By restricting the motion of high-mobility 2D electron gas to a network of channels with smooth confinement, we were able to trace, both classically and quantum-mechanically, the interplay of backscattering, and of the bending action of a…

介观与纳米尺度物理 · 物理学 2015-05-13 V. V. Mkhitaryan , V. Kagalovsky , M. E. Raikh

We report an investigation of quantum Hall induced currents by simultaneous measurements of their magnetic moment and their effect on the conductance of a quantum point contact (QPC). Features in the magnetic moment and QPC resistance are…

介观与纳米尺度物理 · 物理学 2015-05-19 M. J. Smith , C. D. H. Williams , A. Usher , A. S. Sachrajda , A. Kam , Z. R. Wasilewski

For two-electron diatomic molecules, we investigate magnetic field effects in non-sequential double ionization where recollisions prevail. We do so by formulating a three-dimensional semi-classical model that fully accounts for the Coulomb…

Some non linear, second order QED processes in the presence of intense plane electromagnetic waves are investigated. Analytic expressions with general kinematics are derived for Compton scattering and $e^+e^-$ pair production in a…

高能物理 - 唯象学 · 物理学 2017-01-12 A. Hartin

In this paper we investigate a possibility for the existence of an analog of the Quantum Hall Effect for neutral particles with a permanent magnetic moment $\mu$ in the presence of crossed inhomogeneous magnetic and electric fields. We…

强关联电子 · 物理学 2017-03-08 L. R. Ribeiro , E. Passos , C. Furtado , S. Sergeenkov

We show through both theoretical arguments and numerical calculations that graphene discerns an unconventional sequence of quantized Hall conductivity, when subject to both magnetic fields (B) and strain. The latter produces time-reversal…

介观与纳米尺度物理 · 物理学 2015-03-20 Bitan Roy , Zi-Xiang Hu , Kun Yang

Since the discovery of the Fractional Quantum Hall Effect in 1982 there has been considerable theoretical discussion on the possibility of fractional quantization of conductance in the absence of Landau levels formed by a quantizing…

介观与纳米尺度物理 · 物理学 2019-03-05 S. Kumar , M. Pepper , S. N. Holmes , H. Montagu , Y. Gul , D. A. Ritchie , I. Farrer

This paper describes how coherent backscattering is altered by an external magnetic field. In the theory presented, magneto-optical effects occur inside Mie scatterers embedded in a non-magnetic medium. Unlike previous theories based on…

介观与纳米尺度物理 · 物理学 2011-03-07 D. Lacoste , B. A. van Tiggelen

An experiment for the advanced undergraduate laboratory which allows students to study the effect of photon polarisation in Compton scattering and to explore q\ uantum entanglement is described. The quantum entangled photons are produced…

物理教育 · 物理学 2018-05-03 Patrick Knights , Finlay Ryburn , Garry Tungate , Konstantinos Nikolopoulos

It has been shown recently that a neutron placed in an external quasistatic electric field develops an induced electric dipole moment $\mathbf{p}_{\mathrm{IND}}$ due to quantum fluctuations in the QED vacuum. A feasible experiment which…

高能物理 - 唯象学 · 物理学 2013-05-30 O. Zimmer , C. A. Dominguez , H. Falomir , M. Loewe

Quantum fluctuations in the QED vacuum generate non-linear effects, such as peculiar induced electromagnetic fields. In particular, we show here that an electrically neutral particle, possessing a magnetic dipole moment, develops an induced…

高能物理 - 唯象学 · 物理学 2009-09-01 C. A. Dominguez , H. Falomir , M. Ipinza , S. Kohler , M. Loewe , J. C. Rojas

The spectrum of charged particles in translation-invariant systems in a magnetic field is characterized by the Landau levels, which play a fundamental role in the thermodynamic and transport properties of solids. The topological nature and…

介观与纳米尺度物理 · 物理学 2023-10-02 Isac Sahlberg , Moein N. Ivaki , Kim Pöyhönen , Teemu Ojanen

This paper continues the approach of Kostenko \& Thompson to calculating quantum electrodynamic processes in the ultrastrong magnetic field near some neutron stars, such as magnetars or merging binary neutron stars. Here we consider…

高能天体物理现象 · 物理学 2020-03-31 Alexander Kostenko , Christopher Thompson

By exactly solving the effective two-body interaction for two-dimensional electron system with layer thickness and an in-plane magnetic field, we recently found that the effective interaction can be described by the generalized…

强关联电子 · 物理学 2018-11-05 Lin-Peng Yang , Qi Li , Zi-Xiang Hu

Previous work on calculating energy spectra from Compton scattering events has either neglected considering the pulsed structure of the incident laser beam, or has calculated these effects in an approximate way subject to criticism. In this…

We present the effects of nonlinear corrections to the single differential cross section d\sigma/dQ^2 and the reduced cross section \sigma_r (x,Q^2) for the neutral current (NC) e-p scattering at the leading order (LO) and the…

高能物理 - 唯象学 · 物理学 2022-05-18 S. Zarrin , S. Dadfar

We propose an effective two-dimensional quantum non-linear sigma model combined with classical percolation theory to study the magnetic properties of site diluted layered quantum antiferromagnets like La$_{2}$Cu$_{1-x}$M$_x$O$_{4}$ (M$=$Zn,…

无序系统与神经网络 · 物理学 2009-10-31 Y. C. Chen , A. H. Castro Neto