Search results for "Aharonov–Bohm effect"

showing 3 items of 3 documents

Kondo Resonance in a Mesoscopic Ring Coupled to a Quantum Dot: Exact Results for the Aharonov-Bohm/Casher Effects

2000

We study the persistent currents induced by both the Aharonov-Bohm and Aharonov-Casher effects in a one-dimensional mesoscopic ring coupled to a side-branch quantum dot at Kondo resonance. For privileged values of the Aharonov-Bohm-Casher fluxes, the problem can be mapped onto an integrable model, exactly solvable by a Bethe ansatz. In the case of a pure magnetic Aharonov-Bohm flux, we find that the presence of the quantum dot has no effect on the persistent current. In contrast, the Kondo resonance interferes with the spin-dependent Aharonov-Casher effect to induce a current which, in the strong-coupling limit, is independent of the number of electrons in the ring.

General Physics and AstronomyFOS: Physical sciences02 engineering and technologyElectron01 natural sciencesResonance (particle physics)Bethe ansatzCondensed Matter - Strongly Correlated Electronssymbols.namesakeQuantum mechanics0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)010306 general physicsAharonov–Bohm effectPhysicsMesoscopic physicsCondensed Matter - Mesoscale and Nanoscale PhysicsNonlinear Sciences - Exactly Solvable and Integrable SystemsCondensed matter physicsStrongly Correlated Electrons (cond-mat.str-el)Persistent currentQuantum Physics021001 nanoscience & nanotechnologyCondensed Matter::Mesoscopic Systems and Quantum Hall EffectQuantum dotsymbolsKondo effectExactly Solvable and Integrable Systems (nlin.SI)0210 nano-technology
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Reply to “Comment on ‘Limits of the measurability of the local quantum electromagnetic field amplitude’ ”

1999

Electromagnetic fieldPhysicssymbols.namesakeAmplitudeQuantum mechanicsQuantum electrodynamicssymbolsAharonov–Bohm effectQuantumAtomic and Molecular Physics and OpticsPhysical Review A
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Aharonov-Bohm effect in many-electron quantum rings

2010

The Aharonov-Bohm effect is investigated in two-dimensional, single-terminal quantum rings in magnetic fields by using time-dependent density-functional theory. We find multiple transport loops leading to the oscillation periods of $h/(en)$, where $n$ is the number of loops. We show that the Aharonov-Bohm oscillations are relatively weakly affected by the electron-electron interactions, whereas the ring width has a strong effect on the characteristics of the oscillations. Our results propose that in those experimental semiconductor quantum-ring devices that show clear Aharonov-Bohm oscillations the electron current is dominated by a few states along narrow conduction channels.

PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsStrongly Correlated Electrons (cond-mat.str-el)Condensed matter physicsbusiness.industryOscillationFOS: Physical sciencesQuantum PhysicsTime-dependent density functional theoryElectronCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsMagnetic fieldCondensed Matter - Strongly Correlated Electronssymbols.namesakeSemiconductorQuantum dotQuantum mechanicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)symbolsbusinessAharonov–Bohm effectQuantumPhysical Review B
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