Quantum Hall realization of polarized intensity interferometry

We combine the ideas of intensity interferometry, polarization optics, and Bell's measurement into an experimental proposal which is hosted in a [nu]=2 quantum Hall (QH) edge state. Our interferometer comprises of a single gate, that separates the spin-resolved edge states of [nu]=2 state. An a...

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Bibliographic Details
Published in:Physical review. B 2016-06, Vol.93 (22), Article 220101
Main Authors: Roychowdhury, Krishanu, Wadhawan, Disha, Mehta, Poonam, Karmakar, Biswajit, Das, Sourin
Format: Article
Language:English
Subjects:
Coherence length
Condensed matter
Electron spin
Interferometers
Interferometry
Nanostructure
Polarization
Proposals
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Summary:We combine the ideas of intensity interferometry, polarization optics, and Bell's measurement into an experimental proposal which is hosted in a [nu]=2 quantum Hall (QH) edge state. Our interferometer comprises of a single gate, that separates the spin-resolved edge states of [nu]=2 state. An analog of wave plate (from polarization optics) is realized by exposing the individual edges to nanomagnets over a finite length which facilitates coherent manipulation of the electron spin on the edge. We show that the in-plane rotation of magnetization direction of the nanomagnets results in oscillations observed solely in the cross-correlated noise which arises from two-particle interference. Through numerical simulations we demonstrate that our proposal is well within the reach of recent experimental developments of spin manipulations on the QH edge.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.93.220101