FREQUJOC

Frequency-to-current conversion with coherent Josephson crystals

Coordinatore	UNIVERSITE JOSEPH FOURIER GRENOBLE 1    more Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie.
Nazionalità Coordinatore	France [FR]
Totale costo	1˙466˙109 €
EC contributo	1˙466˙109 €
Programma	FP7-IDEAS-ERC Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	ERC-2012-StG_20111012
Funding Scheme	ERC-SG
Anno di inizio	2013
Periodo (anno-mese-giorno)	2013-01-01   -   2018-04-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITE JOSEPH FOURIER GRENOBLE 1  Organization address address: "Avenue Centrale, Domaine Universitaire 621" city: GRENOBLE postcode: 38041 contact info Titolo: Mr. Nome: Yann Cognome: Le Roux Email: send email Telefono: 33476514488 Fax: 33476635956	FR (GRENOBLE)	hostInstitution	1˙466˙109.60
2	UNIVERSITE JOSEPH FOURIER GRENOBLE 1  Organization address address: "Avenue Centrale, Domaine Universitaire 621" city: GRENOBLE postcode: 38041 contact info Titolo: Prof. Nome: Wiebke Cognome: Guichard Email: send email Telefono: +33 4 76 88 10 80 Fax: +33 4 76 88 90 73	FR (GRENOBLE)	hostInstitution	1˙466˙109.60

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 Obiettivo del progetto (Objective)

'This project aims at exploring the coherence of Josephson crystals (JC) and to apply this coherence for frequency-to-current conversion. A Josephson crystal can be realized by a Josephson junction chain, formed by repeating a single junction or SQUID in space to form a one-dimensional ladder structure. Such a crystal can show a macroscopic coherent behavior due to the coherent superposition of quantum phase-slips (CQPS), ie the winding of 2 of the superconducting phase-difference occurring on single junctions. This project aims to perform a major breakthrough by addressing the coherence of circuits containing a large number of Josephson junctions. In particular this proposal aims, by novel experiments on Josephson junction chains, to understand the crucial questions of external charge dynamics and dissipation that originates from the many-body effects present in these chains. In order to fight against internal dissipation, I propose novel designs of Josephson junction chains with a disordered or fractal pattern. In addition, I propose to do a first systematic study on the external charge dynamics occurring in Josephson junction chains, in particular noise correlations. Finally, I aim to use CQPS in a Josephson crystal to realize a frequency-to-current converter. This coherent JC should, under microwave irradiation of frequency f, exhibit exact current quantization I=2nef in multiples n of the electron charge e.'