Bang-Bang Operations from a Geometric Perspective

Details Bang-Bang Operations from a Geometric Perspective Bang-Bang Operations from a Geometric Perspective

2001-10-19

arxiv.org/abs/quant-ph/0110121v3

Quant.Inf.Proc. 1 (2002) 19

Physics

Quantum Physics

7 pages, 5 figures, Changes in new version: added references and a comment on the subgroup condition

Scientific paper

Strong, fast pulses, called ``bang-bang'' controls can be used to eliminate the effects of system-environment interactions. This method for preventing errors in quantum information processors is treated here in a geometric setting which leads to an intuitive perspective. Using this geometric description, we clarify the notion of group symmetrization as an averaging technique, and provide a geometric picture for evaluating errors due to imperfect bang-bang controls. This will provide additional support for the usefulness of such controls as a means for providing more reliable quantum information processing.

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