Overview of Quantum Error Prevention and Leakage Elimination

Details Overview of Quantum Error Prevention and Leakage Elimination Overview of Quantum Error Prevention and Leakage Elimination

2004-02-16

arxiv.org/abs/quant-ph/0402098v1

Journal of Modern Optics Vol. 51, pg. 2449, 2004

Physics

Quantum Physics

8 pages, no figures, submitted to the proceedings of the Physics of Quantum Electronics, 2004

Scientific paper

10.1080/09500340408231803

Quantum error prevention strategies will be required to produce a scalable quantum computing device and are of central importance in this regard. Progress in this area has been quite rapid in the past few years. In order to provide an overview of the achievements in this area, we discuss the three major classes of error prevention strategies, the abilities of these methods and the shortcomings. We then discuss the combinations of these strategies which have recently been proposed in the literature. Finally we present recent results in reducing errors on encoded subspaces using decoupling controls. We show how to generally remove mixing of an encoded subspace with external states (termed leakage errors) using decoupling controls. Such controls are known as ``leakage elimination operations'' or ``LEOs.''

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