Dr. Shankari Rajagopal, a Stanford Science Fellow, will be presenting "Entangling spins via local interactions for quantum-enhanced sensing and simulation" as part of the Quantum Research Institute's winter seminar series on February 9th, from 1:50 pm to 3:00 pm in West Hall Room 340 (3rd floor). A Zoom option is also provided.

Seminar Description:
Quantum sensors hold promise for improved sensing of time, electromagnetic fields, and forces; however, the inherent probabilistic nature of quantum mechanics introduces uncertainty that can limit sensor precision. We can hope to overcome this uncertainty by engineering entanglement — in other words, by creating correlated behavior — in atomic systems. Unfortunately, in practice, introducing and controlling these correlations is limited by the local nature of interactions on many promising sensing platforms, including optical tweezer clocks and solid-state magnetometers. In this talk, I will discuss how we can use temporal control over local Rydberg interactions to extend interaction coherence times and minimize atomic loss in an array of atomic ensembles. With these improvements, we generate metrologically useful entanglement across several spatially separated ensembles in parallel [1]. This work demonstrates both the potential of local interactions to enhance the precision of optical clocks, and the power of spatiotemporal control to enhance and expand the capabilities of atomic systems.
[1] J.A. Hines, S.V. Rajagopal, G.L. Moreau, M.D. Wahrman, N.A. Lewis, O. Marković, and M. Schleier-Smith. Phys. Rev. Lett. 131, 063401 (2023).