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Spatially-selective in situ magnetometry of ultracold atomic clouds
Ottó Elíasson, Robert Heck, Jens S. Laustsen +5
We demonstrate novel implementations of high-precision optical magnetometers which allow for spatially-selective and spatially-resolved in situ measurements using cold atomic cloud…
QEngine: An open-source C++ Library for Quantum Optimal Control of Ultracold Atoms
Jens Jakob Sørensen, Jesper Jensen, Till Heinzel +1
We present the first version of the QEngine, an open-source C++ library for simulating and controlling ultracold quantum systems using optimal control theory (OCT). The most notabl…
Quantum Control with Measurements and Quantum Zeno Dynamics
Jens Jakob Sørensen, Mogens Dalgaard, Alexander Holm Kiilerich +2
We introduce an efficient iterative method to prepare a target state in Hilbert spaces with high dimensionality using a combination of unitary evolution, measurements, and quantum…
Approaching the Quantum Speed Limit with Global-Local Optimization
Jens Jakob Sørensen, Mikel Aranburu, Till Heinzel +1
We propose a Global-Local optimization algorithm for quantum control that combines standard local search methodologies with evolutionary algorithms. This allows us to find faster s…
Quantum Optimal Control in a Chopped Basis: Applications in Control of Bose-Einstein Condensates
Jens Jakob Sørensen, Mikel Aranburu, Till Heinzel +1
We discuss quantum optimal control of Bose-Einstein condensates trapped in magnetic microtraps. The objective is to transfer a condensate from the ground state to the first-excited…
Global optimization for quantum dynamics of few-fermion systems
Xikun Li, Daniel Pęcak, Tomasz Sowiński +2
Quantum state preparation is vital to quantum computation and quantum information processing tasks. In adiabatic state preparation, the target state is theoretically obtained with…