Conductance oscillations in a mesoscopic ring threaded by a harmonically time-dependent magnetic flux

2012 ◽  
Vol 407 (16) ◽  
pp. 3256-3258 ◽  
Author(s):  
María Florencia Ludovico ◽  
Liliana Arrachea
Keyword(s):  
Magnetic Flux ◽  
Time Dependent ◽  
Mesoscopic Ring

scholarly journals Structure and Topology of Magnetic Fields in Solar Prominences

2013 ◽  
Vol 8 (S300) ◽  
pp. 127-134 ◽  
Author(s):  
Adriaan A. van Ballegooijen ◽  
Yingna Su
Keyword(s):  
Magnetic Flux ◽  
Flux Rope ◽  
Time Dependent ◽  
Magnetic Flux Rope ◽  
Magnetic Flux Ropes ◽  
And Topology ◽  
Solar Prominences ◽  
Magnetic Elements ◽  
Dependent Model ◽  
Time Dependent Model

AbstractRecent observations and models of solar prominences are reviewed. The observations suggest that prominences are located in or below magnetic flux ropes that lie horizontally above the PIL. However, the details of the magnetic structure are not yet fully understood. Gravity likely plays an important role in shaping the vertical structures observed in quiescent prominences. Preliminary results from a time-dependent model describing the interaction of a magnetic flux rope with photospheric magnetic elements are presented.

TRANSPORT THROUGH INTERACTING AHARONOV–BOHM–CASHER INTERFEROMETERS

2011 ◽  
Vol 25 (22) ◽  
pp. 3019-3025
Author(s):  
QING-QIANG XU ◽  
BEN-LING GAO ◽  
SHI-JIE XIONG
Keyword(s):  
Magnetic Flux ◽  
Electronic Transport ◽  
Transport Processes ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Filter ◽  
Rashba Spin ◽  
Mesoscopic Ring ◽  
Universal Regime ◽  
Aharonov Bohm

We investigate the transport properties of an interacting ring threaded by a magnetic flux and with Rashba spin-orbit coupling, based on a recently developed functional renormalized group technique. In the calculations of the electronic transport processes, the Coloumb On-site interactions are taken into account. For an interacting ring connected to two leads, we find that (i) for ΦAC = 0, the behavior of transmission zero at ΦAB = π is generic for the universal regime; (ii) for certain ΦAC and ΦAB, one can use the mesoscopic ring as spin filter even in the presence of the local interaction in the ring.

The Aharonov-Anandan current induced by a time-dependent magnetic flux in graphene rings

2013 ◽  
Vol 103 (5) ◽  
pp. 58005 ◽  
Author(s):  
Shengli Zhang ◽  
Huawei Chen ◽  
Erhu Zhang ◽  
Daqing Liu
Keyword(s):  
Magnetic Flux ◽  
Time Dependent

Peierls instability in a mesoscopic ring threaded by a magnetic flux

1992 ◽  
Vol 45 (7) ◽  
pp. 3499-3506 ◽  
Author(s):  
B. Nathanson ◽  
O. Entin-Wohlman ◽  
B. Mühlschlegel
Keyword(s):  
Magnetic Flux ◽  
Peierls Instability ◽  
Mesoscopic Ring

Energy Spectrum and Persistent Currents in Finite-Width Mesoscopic Ring with Radial Potential Barrier Threading a Magnetic Flux Through its Hole

1998 ◽  
Vol 12 (06) ◽  
pp. 663-672
Author(s):  
Ben-Yuan Gu ◽  
Wei-Dong Sheng ◽  
Jian Wang
Keyword(s):  
Energy Spectrum ◽  
Magnetic Flux ◽  
Potential Barrier ◽  
Coupling Effect ◽  
Finite Width ◽  
Persistent Currents ◽  
Tunneling Barrier ◽  
Radial Potential ◽  
Mesoscopic Ring

The energy spectrum and the persistent currents are calculated for a finite-width mesoscopic annulus with radial potential barrier, threading a magnetic flux through the hole of the ring. Owing to the presence of tunneling barrier, the coupling effect leads to the splitting of each radial energy subband of individual concentrical rings into two one. Thus, total currents and currents carried by single high-lying eigenstate as a function of magnetic flux exhibit complicated patterns. However, periodicity and antisymmetry of current curves in the flux still preserve.

Mesoscopic rings driven by time-dependent magnetic flux: Level correlations and localization in energy space

1990 ◽  
Vol 41 (7) ◽  
pp. 4441-4455 ◽  
Author(s):  
Dror Lubin ◽  
Yuval Gefen ◽  
Isaac Goldhirsch
Keyword(s):  
Magnetic Flux ◽  
Energy Space ◽  
Time Dependent ◽  
Flux Level

scholarly journals Comment on “Peierls Gap in a Mesoscopic Ring Threaded by a Magnetic Flux”

1998 ◽  
Vol 80 (15) ◽  
pp. 3416-3416 ◽  
Author(s):  
B. Nathanson ◽  
O. Entin-Wohlman ◽  
B. Mühlschlegel
Keyword(s):  
Magnetic Flux ◽  
Mesoscopic Ring

scholarly journals A new technique for observationally derived boundary conditions for space weather

2018 ◽  
Vol 8 ◽  
pp. A26 ◽  
Author(s):  
Paolo Pagano ◽  
Duncan Hendry Mackay ◽  
Anthony Robinson Yeates
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Boundary Conditions ◽  
Space Weather ◽  
Weather Forecasting ◽  
Interplanetary Space ◽  
Time Dependent ◽  
Magnetic Flux Ropes ◽  
Mhd Simulations ◽  
Flux Ropes

Context. In recent years, space weather research has focused on developing modelling techniques to predict the arrival time and properties of coronal mass ejections (CMEs) at the Earth. The aim of this paper is to propose a new modelling technique suitable for the next generation of Space Weather predictive tools that is both efficient and accurate. The aim of the new approach is to provide interplanetary space weather forecasting models with accurate time dependent boundary conditions of erupting magnetic flux ropes in the upper solar corona. Methods. To produce boundary conditions, we couple two different modelling techniques, MHD simulations and a quasi-static non-potential evolution model. Both are applied on a spatial domain that covers the entire solar surface, although they extend over a different radial distance. The non-potential model uses a time series of observed synoptic magnetograms to drive the non-potential quasi-static evolution of the coronal magnetic field. This allows us to follow the formation and loss of equilibrium of magnetic flux ropes. Following this a MHD simulation captures the dynamic evolution of the erupting flux rope, when it is ejected into interplanetary space. Results.The present paper focuses on the MHD simulations that follow the ejection of magnetic flux ropes to 4 R⊙. We first propose a technique for specifying the pre-eruptive plasma properties in the corona. Next, time dependent MHD simulations describe the ejection of two magnetic flux ropes, that produce time dependent boundary conditions for the magnetic field and plasma at 4 R⊙ that in future may be applied to interplanetary space weather prediction models. Conclusions. In the present paper, we show that the dual use of quasi-static non-potential magnetic field simulations and full time dependent MHD simulations can produce realistic inhomogeneous boundary conditions for space weather forecasting tools. Before a fully operational model can be produced there are a number of technical and scientific challenges that still need to be addressed. Nevertheless, we illustrate that coupling quasi-static and MHD simulations in this way can significantly reduce the computational time required to produce realistic space weather boundary conditions.

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