KOPS - Das Institutionelle Repositorium der Universität Konstanz

Subharmonic transitions and Bloch-Siegert shift in electrically driven spin resonance

Subharmonic transitions and Bloch-Siegert shift in electrically driven spin resonance

Zitieren

Dateien zu dieser Ressource

Dateien Größe Format Anzeige

Zu diesem Dokument gibt es keine Dateien.

ROMHÁNYI, Judit, Guido BURKARD, András PÁLYI, 2015. Subharmonic transitions and Bloch-Siegert shift in electrically driven spin resonance

@unpublished{Romhanyi2015Subha-30971, title={Subharmonic transitions and Bloch-Siegert shift in electrically driven spin resonance}, year={2015}, author={Romhányi, Judit and Burkard, Guido and Pályi, András} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/30971"> <dc:creator>Burkard, Guido</dc:creator> <dc:creator>Romhányi, Judit</dc:creator> <dc:contributor>Romhányi, Judit</dc:contributor> <dc:contributor>Pályi, András</dc:contributor> <dc:language>eng</dc:language> <dc:creator>Pályi, András</dc:creator> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/30971"/> <dcterms:title>Subharmonic transitions and Bloch-Siegert shift in electrically driven spin resonance</dcterms:title> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-05-19T08:41:08Z</dcterms:available> <dc:contributor>Burkard, Guido</dc:contributor> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2015-05-19T08:41:08Z</dc:date> <dcterms:abstract xml:lang="eng">We theoretically study coherent subharmonic (multi-photon) transitions of a harmonically driven spin. We consider two cases: magnetic resonance (MR) with a misaligned, i.e., non-transversal driv- ing field, and electrically driven spin resonance (EDSR) of an electron confined in a one-dimensional, parabolic quantum dot, subject to Rashba spin-orbit interaction. In the EDSR case, we focus on the limit where the orbital level spacing of the quantum dot is the greatest energy scale. Then, we apply time-dependent Schrieffer-Wolff perturbation theory to derive a time-dependent effective two-level Hamiltonian, allowing to describe both MR and EDSR using the Floquet theory of period- ically driven two-level systems. In particular, we characterise the fundamental (single-photon) and the half-harmonic (two-photon) spin transitions. We demonstrate the appearance of two-photon Rabi oscillations, and analytically calculate the fundamental and half-harmonic resonance frequen- cies and the corresponding Rabi frequencies. For EDSR, we find that both the fundamental and the half-harmonic resonance frequency changes upon increasing the strength of the driving elec- tric field, which is an effect analogous to the Bloch-Siegert shift known from MR. Remarkably, the drive-strength dependent correction to the fundamental EDSR resonance frequency has an anoma- lous, negative sign, in contrast to the corresponding Bloch-Siegert shift in MR which is always positive. Our analytical results are supported by numerical simulations, as well as by qualitative interpretations for simple limiting cases.</dcterms:abstract> <dcterms:issued>2015</dcterms:issued> </rdf:Description> </rdf:RDF>

Das Dokument erscheint in:

KOPS Suche


Stöbern

Mein Benutzerkonto