Hannover 2016 – scientific programme
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A: Fachverband Atomphysik
A 17: Ultracold plasmas and Rydberg systems II (with Q)
A 17.3: Talk
Tuesday, March 1, 2016, 15:00–15:15, f303
Optimal preparation of the crystalline states and the GHZ states on Rydberg many-body systems — •Jian Cui1, Rick van Bijnen2, Thomas Pohl2, Simone Montangero1, and Tommaso Calarco1 — 1Institute for Complex Quantum Systems, Ulm, Germany — 2Max-Planck-Institute for the Physics of Complex Systems, Dresden, Germany
Rydberg atoms, characterized by their exaggerated strong and long-range interactions, serve as one of the most promising candidate platforms for quantum simulators. The finite lifetimes of Rydberg atoms set the duration limits within which experiments have to be performed. To identify the dynamics satisfying this lifetime condition based on the current experimental technologies in Rydberg many-body systems, however, turns out to be highly nontrivial. Presently, most methods in this regard rely on the adiabatic evolution, which is slow by definition. Here, we apply the methods from optimal control theory to solve this problem. Optimized control pulses for preparing the crystalline states and the GHZ states on the ultra-cold Rydberg atomic gases with much less time cost than the corresponding adiabatic schemes have been numerically identified. Besides the lifetimes, other realistic experimental constraints and imperfections including the lost of atoms, finite detuning and coupling strengths as well as the limited bandwidths of control pulses, among others, have been taken into account in deriving the results, so that they can be readily applied in real experiments.