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

Towards a single-atom array strongly coupled to an optical microcavity for multiparticle entanglement

Jul 21, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Quantum information: gates, sensing, communication, and thermodynamics Poster session


Photon-mediated interactions between atoms coupled to an optical cavity are emerging as a powerful tool for engineering entangled states and many-body Hamiltonians. However, single-atom addressing and readout is not available in most of these systems.

Leveraging recent development in atom-tweezer arrays, we will present our current effort to combine the strong coupling regime at the single atom level offered by optical fiber Fabry-Perot microcavities with the versatile manipulation and control of single atom enabled by optical tweezers.
We demonstrate Rubidium single-atom trapping in the tweezers, we map the cavity mode by measuring the cavity transmission of a moving single tweezer-trapped atom and we measure single-atom Rabi splitting characteristic of the strong coupling regime. We will also discuss current developments towards multi-tweezers operation and targeting the deterministic loading of the tweezer array in the cavity.

Upon completion, this experimental platform opens up new possibilities for creating, measuring, and utilizing novel types of multi-particle entangled states, such as the generation of spatially delocalized entangled states for multiparameter quantum-enhanced sensing [1].
It opens also the way to new type of quantum simulation where the cavity field creates an effective all-to-all interaction. Such a quantum simulator will allow exploring the transport in disordered spin systems and conductivity in recently discovered, vacuum-enhanced new materials [2, 3, 4] as well as the dynamics of quantum information transport [5].

[1] M. Gessner et al., Phys. Rev. Lett. 121, 130503 (2019)
[2] E. Orgiu et al, Nature Materials 14 , 1123 (2015)
[3] J. Schachenmayer et al, PRL 114, 196403 (2015)
[4] J. Dubail et al., Phys. Rev. A 105, 023714 (2022)
[5] G. Bentsen et al., Phys. Rev. Lett. 123, 130601 (2019)

Presenter name Romain Long
How will you attend ICAP-27? I am planning on in-person attendance

Primary authors

Pierre-Antoine Bourdel (Laboratoire Kastler Brossel) Constance Poulain (Laboratoire Kastler Brossel) Prof. Jakob Reichel (Laboratoire Kastler Brossel) Romain Long (Laboratoire Kastler Brossel)

Presentation materials

There are no materials yet.