Interference in a quantum dot molecule embedded in a ring interferometer

Ihn, Thomas; Sigrist, Martin; Ensslin, Klaus; Wegscheider, Werner; Reinwald, Matthias

doi:10.1088/1367-2630/9/5/111

Cited by 48 publications

(76 citation statements)

References 40 publications

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“…Only recently, we have given a detailed study of the steady-state properties of the systems SERIAL and BRANCHED (cf. [ 17,18,51,92,93,121]. These models have also been used to describe (linear or branched)…”

Section: Resultsmentioning

confidence: 99%

Formation of nonequilibrium steady states in interacting double quantum dots: When coherences dominate the charge distribution

Härtle

Millis

2014

Phys. Rev. B

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We theoretically investigate the full time evolution of a nonequilibrium double quantum dot structure from initial conditions corresponding to different product states (no entanglement between dot and lead) to a nonequilibrium steady state. and an interaction-induced renormalization of energy levels. We find that when the system carries a single electron on average the formation of the steady state is strongly influenced by the coherence between the dots. The latter can be sizeable and indeed larger in the presence of a bias voltage than it is in equilibrium. Moreover, the interdot coherence is shown to lead to a pronounced difference in the population of the dots.

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Section: Resultsmentioning

confidence: 99%

Formation of nonequilibrium steady states in interacting double quantum dots: When coherences dominate the charge distribution

Härtle

Millis

2014

Phys. Rev. B

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“…With the constituent dots arranged in a ring geometry, the TQD is the simplest non-simply connected system expected to exhibit the Aharonov-Bohm (AB) effect [6] in the presence of the perpendicular magnetic field. This effect has been detected in preliminary transport measurements, indicating the coherent coupling between the dots [7,8]. To observe it, one has to fulfill detailed resonance conditions among the dots and between the TQD and the leads.…”

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confidence: 82%

Theory of electronic and transport properties of resonant triple quantum dot molecules

Shim

Delgado

Korkusiński

et al. 2009

Physica Status Solidi (b)

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We present a theory of electronic and transport properties of triple quantum dot molecules in the vicinity of quadruple points where four different charge configurations are on resonance. We study three different quadruple points in the presence of a magnetic field and show that a trapped particle in one of the dot plays an essential role in determining the spin character of the transport. Many‐electron states of the triple quantum dot molecules are used as transport channels in the Fermi's Golden Rule approach and it is demonstrated that the Aharonov–Bohm oscillations of the energy spectrum lead to spin‐selective oscillations in transport. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Single [1,2], double [3][4][5], triple [6][7][8][9][10][11][12], and quadruple lateral gated quantum dot molecules in GaAlAs/GaAs heterojunctions or with dangling bonds on silicon surface have been demonstrated experimentally [13][14][15] and extensively studied theoretically [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. The capability to localize electrons in artificial lateral quantum dot molecules opens up the possibility of exploring the properties of the 1D Hubbard model, a model of strongly correlated electrons [32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Electron-electron interactions, topological phase, and optical properties of a charged artificial benzene ring

et al. 2015

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/npsi/ctrl?action=rtdoc&an=21277409&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=21277409&lang=fr READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions?Contact the NRC Publications Archive team at PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1103/PhysRevB.92.245304Physical Review B -Condensed Matter and Materials Physics, 92, 24, 2015-12-08 PHYSICAL REVIEW B 92, 245304 (2015) Electron-electron interactions, topological phase, and optical properties of a charged artificial benzene ring We present a theory of the electronic and optical properties of a charged artificial benzene ring (ABR). The ABR is described by the extended Hubbard model solved using exact diagonalization methods in both real and Fourier space as a function of the tunneling matrix element t, Hubbard on-site repulsion U , and interdot interaction V . In the strongly interacting case, we discuss exact analytical results for the spectrum of the hole in a half-filled ABR dressed by the spin excitations of the remaining electrons. The spectrum is interpreted in terms of the appearance of a topological phase associated with an effective gauge field piercing through the ring. We show that the maximally spin-polarized (S = 5/2) and maximally spin-depolarized (S = 1/2) states are the lowest energy, orbitally nondegenerate, states. We discuss the evolution of the phase diagram and level crossings as interactions are switched off and the ground state becomes spin nondegenerate but orbitally degenerate S = 1/2. We present a theory of optical absorption spectra and show that the evolution of the ground and excited states, level crossings, and presence of artificial gauge can be detected optically.

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Interference in a quantum dot molecule embedded in a ring interferometer

Cited by 48 publications

References 40 publications

Formation of nonequilibrium steady states in interacting double quantum dots: When coherences dominate the charge distribution

Formation of nonequilibrium steady states in interacting double quantum dots: When coherences dominate the charge distribution

Theory of electronic and transport properties of resonant triple quantum dot molecules

Electron-electron interactions, topological phase, and optical properties of a charged artificial benzene ring

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