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Rohrmeier, Christoph ; Donarini, Andrea

Precession of entangled spin and pseudospin in double quantum dots

Rohrmeier, Christoph and Donarini, Andrea (2022) Precession of entangled spin and pseudospin in double quantum dots. Physical Review B 105 (20), p. 205418.

Date of publication of this fulltext: 24 May 2022 08:54
Article
DOI to cite this document: 10.5283/epub.52325


Abstract

Quantum dot spin valves are characterized by exchange fields which induce spin precession and generate current spin resonances even in the absence of spin splitting. Analogous effects have been studied in double quantum dots, in which the orbital degree of freedom, the pseudospin, replaces the spin in the valve configuration. We generalize, now, this setup to allow for arbitrary spin and orbital ...

Quantum dot spin valves are characterized by exchange fields which induce spin precession and generate current spin resonances even in the absence of spin splitting. Analogous effects have been studied in double quantum dots, in which the orbital degree of freedom, the pseudospin, replaces the spin in the valve configuration. We generalize, now, this setup to allow for arbitrary spin and orbital polarization of the leads, thus obtaining an even richer variety of current resonances, stemming from the precession dynamics of entangled spin and pseudospin. We observe for both vectors a delicate interplay of decoherence, pumping, and precession which can only be understood by also considering the dynamics of the spin-pseudospin correlators. The numerical results are obtained in the framework of a generalized master equation within the cotunneling approximation and are complemented by the analytics of a coherent sequential tunneling model.



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Details

Item typeArticle
Journal or Publication TitlePhysical Review B
Publisher:AMER PHYSICAL SOC
Place of Publication:COLLEGE PK
Volume:105
Number of Issue or Book Chapter:20
Page Range:p. 205418
Date13 May 2022
InstitutionsPhysics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni
Identification Number
ValueType
10.1103/PhysRevB.105.205418DOI
Related URLs
URLURL Type
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.105.205418Publisher
Keywords;
Dewey Decimal Classification500 Science > 530 Physics
StatusPublished
RefereedYes, this version has been refereed
Created at the University of RegensburgYes
URN of the UB Regensburgurn:nbn:de:bvb:355-epub-523250
Item ID52325

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