8 papers
Quantum Composer: A programmable quantum visualization and simulation tool for education and research
Shaeema Zaman Ahmed, Jesper Hasseriis Mohr Jensen, Carrie Ann Weidner +3
Making quantum mechanical equations and concepts come to life through interactive simulation and visualization are commonplace for augmenting learning and teaching. However, graphi…
Crowdsourcing human common sense for quantum control
Jesper Hasseriis Mohr Jensen, Miroslav Gajdacz, Shaeema Zaman Ahmed +6
Citizen science methodologies have over the past decade been applied with great success to help solve highly complex numerical challenges. Here, we take early steps in the quantum…
Optimization of Pulses with Low Bandwidth for Improved Excitation of Multiple-Quantum Coherences in NMR of Quadrupolar Nuclei
Jens Jakob Sørensen, Jacob Søgaard Nyemann, Felix Motzoi +2
We discuss the commonly encountered problem when optimizing NMR pulses using optimal control that the otherwise very precise NMR theory does not provide as excellent agreement with…
Time-Optimal Control of Collisional Gates in Ultracold Atomic Systems
Jesper Hasseriis Mohr Jensen, Jens Jakob Sørensen, Klaus Mølmer +1
We use quantum optimal control to identify fast collision-based two-qubit gates in ultracold atoms. We show that a significant speed up can be achieved by opti…
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…