Study of Multiple Rounds of Error Correction in Solid State NMR QIP

Details Study of Multiple Rounds of Error Correction in Solid State NMR QIP Study of Multiple Rounds of Error Correction in Solid State NMR QIP

2011-03-22

arxiv.org/abs/1103.4396v1

Physics

Quantum Physics

10 pages, 15 figures, submitted to PRA

Scientific paper

Methods to control errors will be essential for quantum information processing. It is widely believed that fault-tolerant quantum error correction is the leading contender to achieve this goal. Although the theory of fault-tolerant quantum error correction is very well understood, experimental implementation has been lagging. We study the feasibility of implementing repeated rounds of quantum error correction with refreshed ancillas in solid state nuclear magnetic resonance (NMR). In particular we study the procedure proposed for extracting entropy that consists of two stages; an error correcting code optimized to function at finite temperature, and an implementation of heat-bath algorithmic cooling to refresh the ancilla qubits. Two algorithms are presented which implement this method, one for performing tests on 4 qubits, the other for practical implementation on 6 qubits. The effects of imperfect implementation are examined in both the error correction and refreshing stages.

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