V Bouchiat et al 2003 Nanotechnology 14 77 doi:10.1088/0957-4484/14/1/318
V Bouchiat1, N Chtchelkatchev2,3, D Feinberg4, G B Lesovik2,3, T Martin3 and J Torrès3,5
Show affiliationsWe 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.
Issue 1 (January 2003)
Received 1 May 2002
Published 20 December 2002
V Bouchiat et al 2003 Nanotechnology 14 77
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