2018/01/15 by Peter A. Ivanov, Nikolay V. Vitanov · 1 citation
Chemical Engineering · Physics and Astronomy · Psychology · #Analytical Chemistry and Sensors #Atomic and Subatomic Physics Research #Displacement (psychology) #Ion #Phase (matter) #Phase space #Physics #Psychology #Quantum #Quantum mechanics #Quantum optics and atomic interactions #quant-ph
paper · pdf · doi:10.1103/physreva.97.032308
published as Phys. Rev. A 97, 032308 (2018) · 6 pages, 5 figures
arxiv created 2018/01/15 · openalex publication_date 2018/03/09 · arxiv updated 2018/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We introduce a quantum sensing protocol for detecting the parameters characterizing the phase-space displacement by using a single trapped ion as a quantum probe. We show that, thanks to the laser-induced coupling between the ion's internal states and the motion mode, the estimation of the two conjugated parameters describing the displacement can be efficiently performed by a set of measurements of the atomic state populations. Furthermore, we introduce a three-parameter protocol capable of detecting the magnitude, the transverse direction, and the phase of the displacement. We characterize the uncertainty of the two- and three-parameter problems in terms of the Fisher information and show that state projective measurement saturates the fundamental quantum Cram'er-Rao bound.