QuCoLiMa Talk – Robert Lewis-Swan – Exploiting nonclassical motion of a trapped ion crystal for quantum-enhanced metrology of global and differential spin rotations

Date: 6. February 2024Time: 17:00 – 18:00Location: Zoom

Speaker:

Robert Lewis-Swan - The University of Oklahoma

Title:

Exploiting nonclassical motion of a trapped ion crystal for quantum-enhanced metrology of global and differential spin rotations

Abstract:

Identifying and demonstrating robust methods to prepare entangled atomic states is a continuing challenge for the realization of state-of-the-art quantum-enhanced sensors. In this spirit, we theoretically investigate prospects for the creation of squeezed and nonclassical spin states in trapped ion arrays by resonantly coupling the spin degrees of freedom to a squeezed state of the collective motion of the ions. By selecting the specific vibrational modes of the ion array to which the spins are coupled according to their spatial structure, the projection noise of the resulting spin states can be tailored for quantum-enhanced sensing of global or differential phase shifts imprinted on sub-ensembles of the spins. We propose a pair of protocols to utilize the generated states and examine the impact of finite size effects, spin-motion entanglement and technical noise. Our results demonstrate our protocol is competitive with other techniques to create spin squeezing as it is scalable, requires only global control of the qubit ensemble and can be readily applied to arrays of varying dimensionality. Our work suggests new opportunities for the preparation of many-body states with tailored correlations for quantum-enhanced metrology in spin-boson systems by exploiting currently available tools for coherent control.

Location:

Zoom

All talks hybrid:

Mixture of on-site talks at the main sites of QuCoLiMa (Erlangen, Mainz, Saarbrücken) as well as online talks. Regardless of where the talks are given, they are livestreamed via Zoom and can be watched from home/office or cooperatively in the following meeting rooms:

- Erlangen: Livestream/Presentation in Lecture hall HF + open sandwiches in the foyer afterwards

- Saarbrücken: Livestream/Presentation in tba

- Mainz: Livestream/Presentation in tba

Zoom-Link:

http://www.qucolima.de/join-qucolima-talk

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QuCoLiMa Talks are regular seminars of the collaborative research center TRR 306 QuCoLiMa (Quantum Cooperativity of Light and Matter), where (external) experts are invited to present their work.

More information at http://www.qucolima.de/talks

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Event Details

Date:
6. February 2024
Time:
17:00 – 18:00
Location:

Zoom

Event Categories:
QuCoLiMa Talks