Increasing sensing resolution with error correction

G. Arrad*, Y. Vinkler, D. Aharonov, A. Retzker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

144 Scopus citations

Abstract

The signal to noise ratio of quantum sensing protocols scales with the square root of the coherence time. Thus, increasing this time is a key goal in the field. By utilizing quantum error correction, we present a novel way of prolonging such coherence times beyond the fundamental limits of current techniques. We develop an implementable sensing protocol that incorporates error correction, and discuss the characteristics of these protocols in different noise and measurement scenarios. We examine the use of entangled versue untangled states, and error correction's reach of the Heisenberg limit. The effects of error correction on coherence times are calculated and we show that measurement precision can be enhanced for both one-directional and general noise.

Original languageAmerican English
Article number150801
JournalPhysical Review Letters
Volume112
Issue number15
DOIs
StatePublished - 16 Apr 2014

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