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arXiv · 1108.0823

Quantum filtering one bit at a time

Jason F. Ralph·Neil P. Oxtoby
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Abstract

In this paper we consider the purification of a quantum state using the information obtained from a continuous measurement record, where the classical measurement record is digitized to a single bit per measurement after the measurements have been made. Analysis indicates that efficient and reliable state purification is achievable for one- and two-qubit systems. We also consider quantum feedback control based on the discrete one-bit measurement sequences.

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Jason F. Ralph, Neil P. Oxtoby. 2011-11-28. Quantum filtering one bit at a time. https://doi.org/10.1103/physrevlett.107.260503

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