Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Ultra-cold plasmas and Rydberg systems III (with Q)
A 20.2: Vortrag
Dienstag, 18. März 2014, 14:15–14:30, BEBEL E44/46
Parallel execution of quantum gates in a long linear ion chain via Rydberg mode shaping — •Weibin Li1, Alexander W. Glaetzle2, Rejish Nath2, and Igor Lesanovsky1 — 1School of Physics and Astronomy, The University of Nottingham, Nottingham NG7 2RD, United Kingdom — 2Institute for Theoretical Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria
We present a mechanism that permits the parallel execution of multiple quantum gate operations within a single long linear ion chain. Our approach is based on large coherent forces that occur when ions are electronically excited to long-lived Rydberg states. The presence of Rydberg ions drastically affects the vibrational mode structure of the ion crystal, giving rise to modes that are spatially localized on isolated subcrystals which can be individually and independently manipulated. We theoretically discuss this Rydberg mode shaping in an experimentally realistic setup and illustrate its power by analyzing the fidelity of two conditional phase flip gates executed in parallel. The ability to dynamically shape vibrational modes on the single-ion level might find applications in quantum simulators and quantum computation architectures.