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Optimal control of complex atomic quantum systems | | S. van Frank
; M. Bonneau
; J. Schmiedmayer
; S. Hild
; C. Gross
; M. Cheneau
; I. Bloch
; T. Pichler
; A. Negretti
; T. Calarco
; S. Montangero
; | | Date: |
6 Nov 2015 | | Abstract: | Quantum technologies will ultimately require manipulating many-body quantum
systems with high precision. Cold atom experiments represent a stepping stone
in that direction: a high degree of control has been achieved on systems of
increasing complexity, however, this control is still sub-optimal. Optimal
control theory is the ideal candidate to bridge the gap between early stage and
optimal experimental protocols, particularly since it was extended to encompass
many-body quantum dynamics. Here, we experimentally demonstrate optimal control
applied to two dynamical processes subject to interactions: the coherent
manipulation of motional states of an atomic Bose-Einstein condensate and the
crossing of a quantum phase transition in small systems of cold atoms in
optical lattices. We show theoretically that these transformations can be made
fast and robust with respect to perturbations, including temperature and atom
number fluctuations, resulting in a good agreement between theoretical
predictions and experimental results. | | Source: | arXiv, 1511.2247 | | Services: | Forum | Review | PDF | Favorites | |
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