The sensitivity of classical and quantum sensing is impaired in a noisy environment. Thus, one of the main challenges facing sensing protocols is to reduce the noise while preserving the signal. State-of-the-art quantum sensing protocols that rely on dynamical decoupling achieve this goal under the restriction of long noise correlation times. We implement a proof-of-principle experiment of a protocol to recover sensitivity by using an error correction for photonic systems that does not have this restriction. The protocol uses a protected entangled qubit to correct a single error. Our results show a recovery of about 87% of the sensitivity, independent of the noise probability.
Bibliographical noteFunding Information:
A.R. acknowledges the support of the Israel Science Foundation (Grant No. 039-8823), the support of the European commission (STReP EQUAM Grant Agreement No. 323714), EU Project DIADEMS and the Marie Curie Career Integration Grant (CIG) IonQuanSense (321798).
© 2016 American Physical Society.