Motional-state analysis of a trapped ion by ultranarrowband composite pulses
Journal article, 2024
In this work, we present a method for measuring the motional state of a two-level system coupled to a harmonic oscillator. Our technique uses ultranarrowband composite pulses on the blue sideband transition to scan through the populations of the different motional states. Our approach does not assume any previous knowledge of the motional state distribution and is easily implemented. It is applicable both inside and outside of the Lamb-Dicke regime. For higher phonon numbers especially, the composite pulse sequence can be used as a filter for measuring phonon number ranges. We demonstrate this measurement technique using a single trapped ion and show good detection results with the numerically evaluated pulse sequence.
Author
Marion Mallweger
Stockholm University
Milena Guevara-Bertsch
Austrian Academy of Sciences
University of Innsbruck
Boyan T. Torosov
Bulgarian Acad Sci
Robin Thomm
Stockholm University
Natalia Kuk
Stockholm University
Harry Parke
Stockholm University
Christan F. Roos
Austrian Academy of Sciences
University of Innsbruck
Gerard Higgins
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Technology
Markus Hennrich
Stockholm University
Nikolay V. Vitanov
Sofia University
PHYSICAL REVIEW A
2469-9926 (ISSN) 2469-9934 (eISSN)
Vol. 110 5 053103Wallenberg Centre for Quantum Technology (WACQT)
Knut and Alice Wallenberg Foundation (KAW 2017.0449, KAW2021.0009, KAW2022.0006), 2018-01-01 -- 2030-03-31.
Testing quantum physics in uncharted territory using a magneto-mechanical oscillator
Swedish Research Council (VR) (2020-00381), 2020-07-01 -- 2023-06-30.
Subject Categories (SSIF 2011)
Atom and Molecular Physics and Optics
DOI
10.1103/PhysRevA.110.053103