Quantum metrology assisted by abstention

B. Gendra, E. Ronco-Bonvehi, J. Calsamiglia, R. Muñoz-Tapia, E. Bagan

Research output: Contribution to journalArticleResearchpeer-review

26 Citations (Scopus)


The main goal of quantum metrology is to obtain accurate values of physical parameters using quantum probes. In this context, we show that abstention, i.e., the possibility of getting an inconclusive answer at readout, can drastically improve the measurement precision and even lead to a change in its asymptotic behavior, from the shot-noise to the Heisenberg scaling. We focus on phase estimation and quantify the required amount of abstention for a given precision. We also develop analytical tools to obtain the asymptotic behavior of the precision and required rate of abstention for arbitrary pure states. © 2013 American Physical Society.
Original languageEnglish
Article number100501
JournalPhysical review letters
Publication statusPublished - 4 Mar 2013


Dive into the research topics of 'Quantum metrology assisted by abstention'. Together they form a unique fingerprint.

Cite this