Title:
QUANTUM INFORMATION PROCESSING METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO2003021527
Kind Code:
A3
Abstract:
A method and apparatus for quantum information processing is disclosed in which logical qubits |0>L and |1>L are respectively encoded by different near orthogonal coherent states | beta > and | alpha >, where < alpha | beta > APPROX 0, | alpha > and | beta > being the computational basis states for the qubits, for example, in which logical qubits |0>L and |1>L are respectively encoded by different ones of the vacuum state |0> and a multi-photon optical coherent state | alpha > which states are the computational basis states for the qubits. This provide an efficient scheme for linear optics quantum processing which is deterministic and for which qubit readout can use homodyne detection which is highly efficient. The invention finds application in quantum computation and quantum communication.
Inventors:
MUNRO WILLIAM JOHN (GB)
RALPH TIMOTHY CAMERON (AU)
MILBURN GERARD JAMES (AU)
RALPH TIMOTHY CAMERON (AU)
MILBURN GERARD JAMES (AU)
Application Number:
PCT/GB2002/003943
Publication Date:
September 23, 2004
Filing Date:
August 28, 2002
Export Citation:
Assignee:
HEWLETT PACKARD CO (US)
MUNRO WILLIAM JOHN (GB)
RALPH TIMOTHY CAMERON (AU)
MILBURN GERARD JAMES (AU)
MUNRO WILLIAM JOHN (GB)
RALPH TIMOTHY CAMERON (AU)
MILBURN GERARD JAMES (AU)
International Classes:
G02F3/00; G06N99/00; (IPC1-7): G06N1/00
Domestic Patent References:
| WO1999053410A1 | 1999-10-21 |
Other References:
COCHRANE P T ET AL: "Macroscopically distinct quantum-superposition states as a bosonic code for amplitude damping", PHYS. REV. A, AT. MOL. OPT. PHYS. (USA), PHYSICAL REVIEW A (ATOMIC, MOLECULAR, AND OPTICAL PHYSICS), APRIL 1999, APS THROUGH AIP, USA, vol. 59, no. 4, April 1999 (1999-04-01), pages 2631 - 2634, XP002290444, ISSN: 1050-2947
19 January 2000 (2000-01-19), XP002290445, Retrieved from the Internet
ZEILINGER A: "Fundamentals of quantum information", PHYS. WORLD (UK), PHYSICS WORLD, MARCH 1998, IOP PUBLISHING, UK, vol. 11, no. 3, March 1998 (1998-03-01), pages 35 - 40, XP002290446, ISSN: 0953-8585
REGGIANI S ET AL: "Two-qbit gates based on coupled quantum wires", 2000 INTERNATIONAL CONFERENCE ON SIMULATION SEMICONDUCTOR PROCESSES AND DEVICES 2000, SEATTLE, WA, USA, 6-8 SEPT 2000, September 2000 (2000-09-01), 2000, PISCATAWAY, NJ, USA, IEEE, USA, pages 184 - 187, XP002290447, ISBN: 0-7803-6279-9
19 January 2000 (2000-01-19), XP002290445, Retrieved from the Internet
ZEILINGER A: "Fundamentals of quantum information", PHYS. WORLD (UK), PHYSICS WORLD, MARCH 1998, IOP PUBLISHING, UK, vol. 11, no. 3, March 1998 (1998-03-01), pages 35 - 40, XP002290446, ISSN: 0953-8585
REGGIANI S ET AL: "Two-qbit gates based on coupled quantum wires", 2000 INTERNATIONAL CONFERENCE ON SIMULATION SEMICONDUCTOR PROCESSES AND DEVICES 2000, SEATTLE, WA, USA, 6-8 SEPT 2000, September 2000 (2000-09-01), 2000, PISCATAWAY, NJ, USA, IEEE, USA, pages 184 - 187, XP002290447, ISBN: 0-7803-6279-9
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