Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 4: Rydberg Atoms, Ions, and Molecules (joint session Q/MO)

Q 4.3: Vortrag

Montag, 10. März 2025, 11:30–11:45, HS I

Avoided-Crossing Rydberg Facilitation with Phonon Coupling in 1D Lattices — •Daniel Brady and Michael Fleischhauer — RPTU Kaiserslautern, Kaiserslautern, Germany

Rydberg anti-blockade (facilitation) offers one of the most promising mechanisms for realizing robust neutral-atom quantum gates. However, concomitant with the strong dipolar interactions between Rydberg atoms (spins) are mechanical forces coupling Rydberg atoms to high motional states (phonons) in their respective tweezer traps. This has so far kept experimental realizations of quantum gates with facilitation out of reach. Recently, Rydberg excitations have been created by coupling to an avoided-crossing potential in an experimental setting. This approximately harmonic potential alters the nature of the spin-phonon coupling and therefore might offer a method of realizing quantum gates.

For a chain of atoms trapped in tweezer arrays under the facilitation constraint, we numerically simulate the dynamics of the spin-phonon coupling. In particular we investigate how the motional degrees of freedom affect the spreading dynamics of Rydberg excitations.

Keywords: Quantum Information; Rydberg Atoms; Phonon Excitations