Group Seminar at LMU: Many-body dynamics and entanglement in Rydberg atom arrays

 Ahmed Omran, Harvard University

June 25, 2019

Who: Ahmed Omran, Harvard University
Where: LMU München, Schellingstr. 4, Seminar room H 107
When: Tuesday 06/25, 09:15

Programmable arrays of neutral atoms provide an exciting avenue for quantum simulations and quantum information processing. We employ a 1D array of neutral atoms coupled to Rydberg states to simulate a transverse-field Ising model with long-range interactions. This system can undergo quantum phase transitions breaking different spatial symmetries, which we study in detail. I will present our studies of non-equilibrium dynamics across these phase transitions, which yields universal scaling laws consistent with the quantum Kibble-Zurek mechanism. In addition, I will describe a method we developed to rapidly and deterministically prepare Greenberger-Horne-Zeilinger (GHZ) states with up to 20 atoms using site resolved engineering of the many-body spectrum and quasi-adiabatic transitions. Furthermore, our local addressing enables the demonstration of entanglement distribution to distant sites in the array and high-fidelity quantum logic gates. The ability to reliably produce and manipulate entanglement in neutral atom systems opens up a new route towards scalable quantum processors.

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