Decoherence-free dynamical and geometrical entangling phase gates

Journal Article · Mon Mar 01 00:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.033817· OSTI ID:20640906

Pachos, Jiannis K; Beige, Almut ^[1]

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1. Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW (United Kingdom)

It is shown that entangling two-qubit phase gates for quantum computation with atoms inside a resonant optical cavity can be generated via common laser addressing, essentially, within one step. The obtained dynamical or geometrical phases are produced by an evolution that is robust against dissipation in form of spontaneous emission from the atoms and the cavity and demonstrates resilience against fluctuations of control parameters. This is achieved by using the setup introduced by Pachos and Walther [Phys. Rev. Lett. 89, 187903 (2002)] and employing entangling Raman- or STIRAP-like transitions that restrict the time evolution of the system onto stable ground states.

• OSTI ID: 20640906
• Journal Information: Physical Review. A, Vol. 69, Issue 3; Other Information: DOI: 10.1103/PhysRevA.69.033817; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
CONTROL
COOLING
CORRELATIONS
EMISSION
EVOLUTION
FLUCTUATIONS
GROUND STATES
INFORMATION THEORY
LASER RADIATION
OPTICS
QUANTUM MECHANICS
RAMAN SPECTRA