Quantum Metrology and Quantum Sensors

Dowling

Christian D. Marciniak, Thomas Feldker, Ivan Pogorelov +7 more

Mauro Paternostro, Diogo de Oliveira Soares Pinto

Valeria Cimini, Marco Barbieri, Ilaria Gianani +7 more

High precision measurements are performed everyday through sensors already present in many modern technological applications. The challenge of reaching the maximum accuracy, building more powerful devices, can be done only using quantum effects [1]. The field that studies how to improve the sensitivity of measurements is Quantum Metrology. Quantum metrology techniques have been extensively adopted to perform static measurements in many scenarios, showing that multi-photon entangled states, may achieve the ultimate bound on sensitivity.

Zhuoran Bao, Daniel F. V. James

Quantum metrology has been making amazing progress in the past decades. It is always in researchers' interest to search for new optimal states that improve parameter estimation. In this paper, we point out a connection between the code's error correcting capacity and its ability to act as a sensor. We backed our claim by providing an example that relates the Absorption emission code to the sensor state for arbitrary state rotation. It is hoped that, in building such a unified theory, one can draw inspiration from error correction to develop promising quantum sensors.

Vittorio Giovannetti, Seth Lloyd, Lorenzo Maccone