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

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

2003-01-09

arxiv.org/abs/quant-ph/0301036v1

Phys. Rev. A 68, 012320 (2003)

Physics

Quantum Physics

6 pages, 4 figures

Scientific paper

10.1103/PhysRevA.68.012320

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. Our proposed gate operation is tolerant to variations between ions of coupling strengths, pulse lengths, and frequency shifts, and 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.

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