Single-walled carbon nanotube-superconductor entangler: noise correlations and Einstein-Podolsky-Rosen states
Authors: Bouchiat V.1; Chtchelkatchev N.2; Feinberg D.3; Lesovik G.B.2; Martin T.4; Torrès J.4
Source: Nanotechnology, Volume 14, Number 1, 2003 , pp. 77-85(9)
Publisher: Institute of Physics Publishing
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Abstract:
We propose a device which implements a solid-state nanostructured electron entangler. It consists of a single-walled carbon nanotube connected at both ends to normal state electrodes and coupled in its middle part to a superconducting nanowire. Such a device acts as an electronic beam splitter for correlated electrons originating from the superconductor. We first show that it can be used to detect positive (bosonic-like) noise correlations in a fermionic system. Furthermore, it provides a source for entangled electrons in the two arms of the splitter. To generate entangled electron states, we propose two kinds of set-up based either on spin or energy filters. They respectively consist of ferromagnetic pads and of a system of electrostatic gates which define quantum dots. The fabrication of this device would require state-of-the-art nanofabrication techniques, carbon nanotube synthesis and integration, as well as atomic force microscopy imaging and manipulation.
Language: English
Document Type: Miscellaneous
Affiliations: 1: Centre de Recherches sur les Très Basses Températures, CNRS, BP166X, 38042 Grenoble, France 2: LD Landau Institute for Theoretical Physics, Russian Academy of Sciences, Kosygina Str 2, 117940, Moscow, Russia 3: Laboratoire d'Etudes des Propriétés Electroniques des Solides*, CNRS, BP166, 38042 Grenoble, France 4: Centre de Physique Théorique et Université de la Méditerranée, Case 907, 13288 Marseille, France
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