Robust quantum gates and a bus architecture for quantum computing with rare-earth-ion-doped crystals

Journal Article · Tue Jul 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.68.012320· OSTI ID:20639886

Wesenberg, Janus; Moelmer, Klaus ^[1]

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1. QUANTOP, Danish Research Foundation Center for Quantum Optics, Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, (Denmark)

We present a composite pulse controlled phase gate which, together with a bus architecture, improves the feasibility of a recent quantum computing proposal based on rare-earth-ion-doped crystals. The proposed gate operation is tolerant to variations between ions of coupling strengths, pulse lengths, and frequency shifts. In the absence of decoherence effects, it achieves worst case fidelities above 0.999 with relative variations in coupling strength as high as 10% and frequency shifts up to several percent of the resonant Rabi frequency of the laser used to implement the gate. We outline an experiment to demonstrate the creation and detection of maximally entangled states in the system.

• OSTI ID: 20639886
• Journal Information: Physical Review. A, Vol. 68, Issue 1; Other Information: DOI: 10.1103/PhysRevA.68.012320; (c) 2003 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
CORRELATIONS
COUPLING
CRYSTAL DOPING
CRYSTALS
DETECTION
DOPED MATERIALS
ENERGY LEVELS
GATING CIRCUITS
INFORMATION THEORY
IONS
LASER RADIATION
OPERATION
PULSES
QUANTUM MECHANICS
RARE EARTHS
TOPOLOGY
VARIATIONS