Continuous quantum error correction as classical hybrid control

Details Continuous quantum error correction as classical hybrid control Continuous quantum error correction as classical hybrid control

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11j5044m&link_type=abstract

New Journal of Physics, Volume 11, Issue 10, pp. 105044 (2009).

Physics

7

Scientific paper

The standard formulation of quantum error correction (QEC) comprises repeated cycles of error estimation and corrective intervention in the free dynamics of a qubit register. QEC can thus be seen as a form of feedback control, and it is of interest to seek a deeper understanding of the connection between the associated theories. Here we present a focused case study within this broad program, connecting continuous QEC with elements of hybrid control theory. We show that canonical methods of the latter engineering discipline, such as recursive filtering and dynamic programming approaches to solving the optimal control problem, can be applied fruitfully in the design of separated controller structures for quantum memories based on coding and continuous syndrome measurement.

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