Results 31 to 40 of about 1,708,012 (159)

Quantum pumping: Coherent Rings versus Open Conductors [PDF]

, 2003
We examine adiabatic quantum pumping generated by an oscillating scatterer embedded in a one-dimensional ballistic ring and compare it with pumping caused by the same scatterer connected to external reservoirs.
A. Andreev, A. Prêtre, D.J. Thouless, F. Zhou, I.L. Aleiner, J. Friedel, J.E. Avron, J.E. Avron, J.E. Avron, M. Büttiker, M. Büttiker, M. Büttiker, M. Büttiker, M. Moskalets, M. Moskalets, M. Moskalets, M. Moskalets, M. Moskalets, M. Moskalets, M. Switkes, M.G. Vavilov, M.L. Polianski, O. Entin-Wohlman, P. Sharma, P.W. Brouwer, P.W. Brouwer, T.A. Shutenko, V. Gudmundsson, Y. Makhlin, Y. Wei   +29 more
core   +2 more sources

Modeling ring current proton distribution using MLP, CNN, LSTM, and transformer networks

Frontiers in Astronomy and Space Sciences
This study aims at developing ring current proton flux models using four neural network architectures: a multilayer perceptron (MLP), a convolutional neural network (CNN), a long short-term memory (LSTM) network, and a Transformer network.
Jinxing Li, Jacob Bortnik, Qiushuo Wang, Yingnian Wu, Andrew Lizarraga, Mirana Angel, Beibei Wang, Qianzhuang Wen, Jeffrey Jiang   +8 more
doaj   +1 more source

Superconducting fluctuation current caused by gravitational drag

, 2017
We examine a possible effect of the Lense--Thirring field or gravitational drag by calculating the fluctuation current through a superconducting ring.
Kuratsuji, Hiroshi, Tsuchida, Satoshi
core   +1 more source

Development of a superconducting protection switch for the HERA P-ring: design study and demonstration models [PDF]

, 1988
The electrical circuit of the HERA (Hadron Electron Ring Accelerator) proton ring (p-ring) is divided in octants so that in the case of a quench, the current has to be commutated to dumping resistors.
Haken, B. ten, Kate, H.H.J. ten, Klundert, L.J.M. van de, Wipf, S.L.   +3 more
core   +3 more sources

Improved Lifetime Model of Energetic Electrons Due to Their Interactions With Chorus Waves

Geophysical Research Letters
Chorus waves induce both electron acceleration and loss. In this letter, we provide significantly improved models of electron lifetime due to interactions with chorus waves.
Dedong Wang, Yuri Y. Shprits, Bernhard Haas, Alexander Y. Drozdov   +3 more
doaj   +1 more source

Multi-point observation of interplanetary shock–driven asymmetry of dayside inner-magnetospheric keV particles under geomagnetically quiet conditions

Frontiers in Astronomy and Space Sciences
We present simultaneous multi-point observation of local-time asymmetry in keV ion and electron fluxes during the interplanetary (IP) shock impact on 19 April 2014 under geomagnetically quiet conditions.
Megha Pandya, Megha Pandya, Philemon J. Kuo, Guan Le, Mei-Ching Fok, Sang-Yun Lee, Sang-Yun Lee, Denny M. Oliveira, Denny M. Oliveira, Geoffrey D. Reeves, Geoffrey D. Reeves   +10 more
doaj   +1 more source

Comparing magnetopause predictions from two MHD models during a geomagnetic storm and a quiet period

Frontiers in Astronomy and Space Sciences, 2023
Magnetopause location is an important prediction of numerical simulations of the magnetosphere, yet the models can err, either under-predicting or over-predicting the motion of the boundary.
Pauline M. Dredger, Ramon E. Lopez, Yaireska M. Collado-Vega   +2 more
doaj   +1 more source

Mono-parametric quantum charge pumping: interplay between spatial interference and photon-assisted tunneling

, 2005
We analyze quantum charge pumping in an open ring with a dot embedded in one of its arms. We show that cyclic driving of the dot levels by a \textit{single} parameter leads to a pumped current when a static magnetic flux is simultaneously applied to the ...
E. N. Economou, E. V. Anda, H. M. Pastawski, Luis E. F. Foa Torres, M. Büttiker, V. I. Fal’ko   +5 more
core   +1 more source

Investigating seasonal features of electron temperature enhancement regions in the subauroral ionosphere

Solar-Terrestrial Physics, 2019
The electron temperature enhancement is known to occur in the main ionospheric trough during geomagnetic disturbances. In this paper, we study fea-tures of the formation of the electron temperature (Te) enhancement in the subauroral ionosphere by ...
Gololobov A.Yu., Golikov I.A.
doaj   +1 more source

Transpolar Convection and Magnetospheric Ring Current Relations: Real‐Time Applications of the Polar Cap (PC) Indices

Space Weather, 2021
The present study confirms the validity of previously derived relations between the polar cap (PC) indices and the ASY‐H and the Dst and SYM‐H ring current indices when used in real‐time applications.
Peter Stauning
doaj   +1 more source