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A minimal double quantum dot.

Abstract：

:Double quantum dots (DQDs) are a versatile platform for solid-state physics, quantum computation and nanotechnology. The micro-fabrication techniques commonly used to fabricate DQDs are difficult to extend to the atomic scale. Using an alternative approach, which relies on scanning tunneling microscopy and spectroscopy, we prepared a minimal DQD in a wide band-gap semiconductor matrix. It is comprised of a pair of strongly coupled donor atoms that can each be doubly charged. The donor excitation diagram of this system mimicks the charge stability diagram observed in transport measurements of DQDs. We furthermore illustrate how the charge and spin degrees of freedom of the minimal DQD may be used to obtain a single quantum bit and to prepare a Bell state. The results open an intriguing perspective for quantum electronics with atomic-scale structures.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Zheng H,Zhang J,Berndt R

doi

10.1038/s41598-017-10814-z

subject

Has Abstract

pub_date

2017-09-07 00:00:00

pages

10764

issue

1

issn

2045-2322

pii

10.1038/s41598-017-10814-z

journal_volume

7

pub_type

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