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Gefen, Alexandre; Audet, René

doi:10.4000/books.pub.5660

Cited by 16 publications

(4 citation statements)

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“…1(a). An experimental observation of such asymmetry [17], therefore, provides proof of "partial coherence" [15] of the dot-ring spin-entangled state.…”

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confidence: 93%

Observation of “Partial Coherence” in an Aharonov-Bohm Interferometer with a Quantum Dot

et al. 2004

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We report experiments on the interference through spin states of electrons in a quantum dot (QD) embedded in an Aharonov-Bohm (AB) interferometer. We have picked up a spin-pair state, for which the environmental conditions are ideally similar. The AB amplitude is traced in a range of gate voltage that covers the pair. The behavior of the asymmetry in the amplitude around the two Coulomb peaks agrees with the theoretical prediction that the spin-flip process in a QD is related to the quantum dephasing of electrons. These results constitute evidence of "partial coherence" due to an entanglement of spins in the QD and in the interferometer.

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“…1(a). An experimental observation of such asymmetry [17], therefore, provides proof of "partial coherence" [15] of the dot-ring spin-entangled state.…”

mentioning

confidence: 93%

Observation of “Partial Coherence” in an Aharonov-Bohm Interferometer with a Quantum Dot

et al. 2004

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“…where, H I is the Hamiltonian of the interferometer that can be expressed within the non-interacting picture like, (5) In this Hamiltonian ǫ i gives the on-site energy for the atomic site i, where i runs from 1 to 4, c † i (c i ) is the creation (annihilation) operator of an electron at the site i and t ij is the hopping integral between the nearest-neighbor sites i and j. For the sake of simplicity, we assume that the magnitudes of all hopping integrals (t ij ) are identical to t. The phase factor θ ij , associated with the hopping integral t ij , comes due to the fluxes φ 1 and φ 2 in the two sub-rings.…”

Section: Model and Synopsis Of The Theoretical Backgroundmentioning

confidence: 99%

“…With the aid of present nanotechnological progress [1,2], these simple looking quantum confined systems can be used to design nanodevices especially in electronic as well as spintronic engineering. The key idea of manufacturing nanodevices is based on the concept of quantum interference effect [3,4,5], and it is generally preserved throughout the sample having dimension smaller or comparable to the phase coherence length. Therefore, ring type conductors or two path devices are ideal candidates to exploit the effect of quantum interference [6].…”

Section: Introductionmentioning

confidence: 99%

“…The key idea of manufacturing nanodevices is based on the concept of the quantum interference effect [3][4][5], and it is generally preserved throughout the sample having dimensions smaller than or comparable with the phase coherence length. Therefore, ring-type conductors or two-path devices are ideal candidates to exploit the effect of quantum interference [6].…”

Section: Introductionmentioning

confidence: 99%

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Electron transport through a quantum interferometer: a theoretical study

Maiti

2010

Phys. Scr.

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In the present work we explore electron transport properties through a quantum interferometer attached symmetrically to two one-dimensional semi-infinite metallic electrodes, namely, source and drain. The interferometer is made up of two sub-rings where individual sub-rings are penetrated by Aharonov-Bohm fluxes φ 1 and φ 2 , respectively. We adopt a simple tight-binding framework to describe the model and all the calculations are done based on the single particle Green's function formalism. Our exact numerical calculations describe two-terminal conductance and current as functions of interferometer-to-electrode coupling strength, magnetic fluxes threaded by left and right sub-rings of the interferometer and the difference of these two fluxes. Our theoretical results provide several interesting features of electron transport across the interferometer, and these aspects may be utilized to study electron transport in Aharonov-Bohm geometries. PACS No.: 73.23.-b; 73.63.Rt.

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The Documentary Imagination in Twentieth-Century French Literature

James¹

2020

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This book studies the documentary impulse that plays a central role in twentieth-century French literature. Focusing on nonfiction narratives, it analyzes the use of documents—pieces of textual or visual evidence incorporated into the literary work to relay and interrogate reality. It traces the emergence of an enduring concern with factual reference in texts that engage with current events or the historical archive. Writers idealize the document as a fragment of raw reality, but also reveal its constructed and mediated nature and integrate it as a voice within a larger composition. This ambivalent documentary imagination, present in works by Gide, Breton, Aragon, Yourcenar, Duras, and Modiano (among others), shapes the relationship of literature to visual media, testimonial discourses, and self-representation. Far from turning away from realism in the twentieth century, French literature often turns to the document as a site of both modernist experiment and engagement with the world.

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Présentation

Cited by 16 publications

References 0 publications

Observation of “Partial Coherence” in an Aharonov-Bohm Interferometer with a Quantum Dot

Observation of “Partial Coherence” in an Aharonov-Bohm Interferometer with a Quantum Dot

Electron transport through a quantum interferometer: a theoretical study

The Documentary Imagination in Twentieth-Century French Literature

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