Title:
SUPERCONDUCTING QUANTUM BIT DEVICE WITH JOSEPHSON JUNCTIONS
Document Type and Number:
WIPO Patent Application WO2003094250
Kind Code:
A3
Abstract:
The invention relates to a Josephson junction superconducting quantum bit device having a charge as a first main degree of freedom assigned to writing and a phase as a second main degree of freedom assigned to reading. The inventive device comprises a Cooper pair box (110) with first and second Josephson junctions (101, 102) defining a charge island and closing on a superconducting loop. A readout circuit comprises a readout Josephson junction (105) which is inserted in the superconducting loop, with Josephson energy which is at lest 50 times greater than the Josephson energy of each of the first and second Josephson junctions (101, 102).
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Inventors:
ESTEVE DANIEL
VION DENIS
DEVORET MICHEL
URBINA CRISTIAN
JOYEZ PHILIPPE
POTHIER HUGUES
ORFILA PIERRE-FRANCOIS
AASSIME ABDELHAHIM
COTTET AUDREY
VION DENIS
DEVORET MICHEL
URBINA CRISTIAN
JOYEZ PHILIPPE
POTHIER HUGUES
ORFILA PIERRE-FRANCOIS
AASSIME ABDELHAHIM
COTTET AUDREY
Application Number:
PCT/FR2003/001386
Publication Date:
April 08, 2004
Filing Date:
May 05, 2003
Export Citation:
Assignee:
COMMISSARIAT ENERGIE ATOMIQUE (FR)
International Classes:
H01L39/22; G06N99/00; G11C16/02; H01L27/18; H03K19/195; (IPC1-7): H01L39/22; G06N1/00
Other References:
COTTET A ET AL: "Implementation of a combined charge-phase quantum bit in a superconducting circuit", PHYSICA C, vol. 367, no. 1-4, 15 February 2002 (2002-02-15), pages 197 - 203, XP004332029, ISSN: 0921-4534
ZORIN A B: "Cooper-pair qubit and Cooper-pair electrometer in one device", PHYSICA C, vol. 368, no. 1-4, 1 March 2002 (2002-03-01), pages 284 - 288, XP004336224, ISSN: 0921-4534
VION D ET AL: "Manipulating the quantum state of an electrical circuit", SCIENCE, vol. 296, no. 5569, 3 May 2002 (2002-05-03), pages 886 - 889, XP002267491, ISSN: 0036-8075
ZORIN A B: "Cooper-pair qubit and Cooper-pair electrometer in one device", PHYSICA C, vol. 368, no. 1-4, 1 March 2002 (2002-03-01), pages 284 - 288, XP004336224, ISSN: 0921-4534
VION D ET AL: "Manipulating the quantum state of an electrical circuit", SCIENCE, vol. 296, no. 5569, 3 May 2002 (2002-05-03), pages 886 - 889, XP002267491, ISSN: 0036-8075
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