Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Quantum Non-Demolition Measurement on Spin Precession of Laser-Trapped $^{171}$Yb Atoms

Not scheduled
1h 30m
Abstract of recent or ongoing work (by remote / virtual participant) Precision measurement and tests of fundamental physics Abstracts by remote participants


Quantum non-demolition (QND) measurement enhances the detection efficiency and measurement fidelity, and is highly desired for its applications in precision measurements and quantum information processing. We propose and demonstrate a QND scheme for the spin state of laser-trapped atoms, allowing the atoms in each spin state to be probed repeatedly. On $^{171}$Yb atoms held in an optical dipole trap, a spin-selective cycling transition is produced by introducing an ancillary laser. We measure the phase of spin precession of the $^{171}$Yb atoms in a 20-mG bias magnetic field. The QND approach reduces the measurement noise by ∼19 dB, to a level of 2.4 dB below the atom shot noise.
*This work has been supported by the Strategic PriorityResearch Program of the Chinese Academy of Sciencesthrough Grant No. XDB21010200 and by the National Natural Science Foundation of China (NSFC) throughGrants No. 91636215, No. 11704368, and Anhui Initiative in Quantum Information Technologies through Grant No. AHY110000.

Presenter name Yang Yang
online poster URL https://drive.google.com/file/d/18XWfAu6a_yIxUWgCYQ02l7laStfqlJUR/view?usp=sharing
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