Efficient scheme for one-way quantum computing in thermal cavities

Details Efficient scheme for one-way quantum computing in thermal cavities Efficient scheme for one-way quantum computing in thermal cavities

2007-04-18

arxiv.org/abs/0704.2297v1

International Journal of Theoretical Physics, Volume 47, Number 11, 2997-3004 (2008)

Physics

Quantum Physics

6 pages, 3 figures

Scientific paper

10.1007/s10773-008-9734-x

We propose a practical scheme for one-way quantum computing based on efficient generation of 2D cluster state in thermal cavities. We achieve a controlled-phase gate that is neither sensitive to cavity decay nor to thermal field by adding a strong classical field to the two-level atoms. We show that a 2D cluster state can be generated directly by making every two atoms collide in an array of cavities, with numerically calculated parameters and appropriate operation sequence that can be easily achieved in practical Cavity QED experiments. Based on a generated cluster state in Box$^{(4)}$ configuration, we then implement Grover's search algorithm for four database elements in a very simple way as an example of one-way quantum computing.

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