SAWQUBIT

SAW-driven single-electron quantum devices with optical readout of the spin

 Coordinatore THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE 

 Organization address address: The Old Schools, Trinity Lane
city: CAMBRIDGE
postcode: CB2 1TN

contact info
Titolo: Ms.
Nome: Edna
Cognome: Murphy
Email: send email
Telefono: +44 1223 333543
Fax: +44 1223 332988

 Nazionalità Coordinatore United Kingdom [UK]
 Totale costo 0 €
 EC contributo 171˙867 €
 Programma FP7-PEOPLE
Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
 Code Call FP7-PEOPLE-IEF-2008
 Funding Scheme MC-IEF
 Anno di inizio 2010
 Periodo (anno-mese-giorno) 2010-01-01   -   2011-12-31

 Partecipanti

# participant  country  role  EC contrib. [€] 
1    THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE

 Organization address address: The Old Schools, Trinity Lane
city: CAMBRIDGE
postcode: CB2 1TN

contact info
Titolo: Ms.
Nome: Edna
Cognome: Murphy
Email: send email
Telefono: +44 1223 333543
Fax: +44 1223 332988

UK (CAMBRIDGE) coordinator 171˙867.62

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scheme    optical    computation    electron    saw    interface    quantum    processor    qubit    single    spin    polarization    qubits    flying    permit    photon   

 Obiettivo del progetto (Objective)

'The proposal is aimed at the experimental development of a novel solid-state quantum computation scheme and its interface to quantum optics. The computation scheme, put forward at the University of Cambridge, uses the spin of an electron trapped in the dynamic potential associated with a surface acoustic wave (SAW) as a “flying” qubit. The capture of single electrons in moving quantum dots occurs when the SAW passes along a depleted 1D channel. Channels in parallel provide the set of qubits, forming the core of a SAW-based quantum processor. The objective of this proposal is the development of such SAW-driven single-electron quantum devices and the optical readout of the spin of the electron to extend the capabilities of the quantum processor into the optical domain for quantum communication. A lateral n-p junction will be introduced into a GaAs heterostructure, where each electron recombines, leading to single-photon emission. The measurement of the polarization of the emitted photon will determine the spin of the electron, since the conservation of the angular momentum dictates that the photon will have left or right circular polarization depending on the sign of the component of the electron’s spin in the direction of propagation of the photon. Therefore, the flying-qubit processing scheme may permit the distribution of quantum information quickly over large distances across the quantum circuit, to interface with quantum memory registers at fixed localizations or static qubits, and to transfer a qubit from an electron in a quantum dot to a polarized photon. In addition, the fact that the flux directly measures the average spin alleviates the need for single-shot spin or photon measurements and greatly improves the signal-noise ratio. The cutting-edge research of this proposal will permit the fellow to acquire a strong hands-on experience on the most advanced techniques of nanoelectronics, which will have an enormous impact on his career development.'

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