Scientific Results

Fast closed-loop optimal control of ultracold atoms in an optical lattice

Year: 2013

Authors: Rosi S., Bernard A., Fabbri N., Fallani L., Fort C., Inguscio M., Calarco T., Montangero S.

Autors Affiliation: LENS and Dipartimento di Fisica e Astronomia, Università di Firenze, and INO-CNR, 50019 Sesto Fiorentino, Italy; QSTAR Center for Quantum Science and Technology, Largo Enrico Fermi, I-50125 Arcetri, Italy; Institut fur Quanteninformationsverarbeitung, Universitat Ulm, D-89069 Ulm, Germany

Abstract: We present experimental evidence of the successful closed-loop optimization of the dynamics of cold atoms in an optical lattice. We optimize the loading of an ultracold atomic gas minimizing the excitations in an array of one-dimensional (1D) tubes (3D-1D crossover) and we perform an optimal crossing of the quantum phase-transition from a superfluid to a Mott insulator in a 3D lattice. In both cases we enhance the experiment performances with respect to those obtained via adiabatic dynamics, effectively speeding up the process by more than a factor three while improving the quality of the desired transformation.

Journal/Review: PHYSICAL REVIEW A

Volume: 88 (2)      Pages from: 021601  to: 021601

More Information: We acknowledge support from EU IP Project AQUTE and Project EU-STREP MALICIA. The work at LENS has been supported by MIUR through Grant No. PRIN2009, ERC Advanced Grant No. DISQUA, IIT Seed Project ENCORE. T.C. and S.M. acknowledge support from the DFG via Grant No. SFB/TRR21.
KeyWords: 3D lattices; Adiabatic dynamics; Atomic gas; Closed-loop; Experimental evidence; Mott insulators; Optimal controls; Ultracold atoms, Crystal lattices; Optical lattices; Optical materials; Optimization; Three dimensional, Loading
DOI: 10.1103/PhysRevA.88.021601

Citations: 29
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