High-precision force sensing using a single trapped ion

• DOI: 10.1038/srep28078
• Publication Date: 2016-06-16T10:07:31Z
• Authors: Peter A. Ivanov; Nikolay V. Vitanov; Kilian Singer
• Keywords: Dephasing; Dynamical decoupling; Decoupling (probability); Rabi cycle; Rabi frequency

Abstract We introduce quantum sensing schemes for measuring very weak forces with a single trapped ion. They use the spin-motional coupling induced by laser-ion interaction to transfer relevant force information spin-degree of freedom. Therefore, estimation is carried out simply observing Ramsey-type oscillations ion spin states. Three probes are considered, which represented systems obeying Jaynes-Cummings, Rabi (in 1D) and Jahn-Teller 2D) models. By using dynamical decoupling in Jaynes-Cummings models, our protocols can be made robust dephasing caused thermal magnetic field fluctuations. In quantum-Rabi probe, residual spin-phonon vanishes, makes this protocol naturally thermally-induced dephasing. show that proposed techniques used sense axial transverse components sensitivity beyond "Equation missing"<!-- image only, no MathML or LaTex --> range, i.e. (xennonewton, 10 −27 ). The protocol, particular, implement two-channel vector spectrum analyzer ultra-low voltages.