Global optimization for quantum dynamics of few-fermion systems

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Quantum state preparation is vital to quantum computation and quantum information processing tasks. In adiabatic state preparation, the target state is theoretically obtained with nearly perfect fidelity if the control parameter is tuned slowly enough. As this, however, leads to slow dynamics, it is often desirable to be able to carry out processes more rapidly. In this work, we employ two global optimization methods to estimate the quantum speed limit for few-fermion systems confined in a one-dimensional harmonic trap. Such systems can be produced experimentally in a well-controlled manner. We determine the optimized control fields and achieve a reduction in the ramping time of more than a factor of four compared to linear ramping. We also investigate how robust the fidelity is to small variations of the control fields away from the optimized shapes.

Original languageEnglish
Article number033602
JournalPhysical Review A
Volume97
Issue number3
Number of pages8
ISSN2469-9926
DOIs
StatePublished - 1 Mar 2018

    Research areas

  • TONKS-GIRARDEAU GAS, DIFFERENTIAL EVOLUTION, OPTICAL LATTICE, ATOMS, SEA

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