Realising Quantum Computing: Physical Systems and Robustness
The physical realisation of a large quantum computer, i.e. one which could perform calculations beyond the capabilities of classical computers, is discussed. It is necessary to consider both the physical mechanisms of the hardware and the noise tolerance of quantum error correction (QEC) methods. Estimates for noise tolerance which involve fewer simplifying assumptions than were previously employed are given, and the scaling of logic gate rate with logic gate precision is discussed. It is found that QEC is fast compared to methods such as adiabatic passage.
Keywordsquantum error correction computer
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