Self-verifying variational quantum simulation of lattice models
Hybrid classical–quantum algorithms aim to variationally solve optimization problems using
a feedback loop between a classical computer and a quantum co-processor, while …
a feedback loop between a classical computer and a quantum co-processor, while …
Fast machine-learning online optimization of ultra-cold-atom experiments
We apply an online optimization process based on machine learning to the production of
Bose-Einstein condensates (BEC). BEC is typically created with an exponential evaporation …
Bose-Einstein condensates (BEC). BEC is typically created with an exponential evaporation …
Optimizing variational quantum algorithms using pontryagin's minimum principle
We use Pontryagin's minimum principle to optimize variational quantum algorithms. We
show that for a fixed computation time, the optimal evolution has a bang-bang (square …
show that for a fixed computation time, the optimal evolution has a bang-bang (square …
Applying machine learning optimization methods to the production of a quantum gas
We apply three machine learning strategies to optimize the atomic cooling processes
utilized in the production of a Bose–Einstein condensate (BEC). For the first time, we …
utilized in the production of a Bose–Einstein condensate (BEC). For the first time, we …
Remote optimization of an ultracold atoms experiment by experts and citizen scientists
R Heck, O Vuculescu, JJ Sørensen… - Proceedings of the …, 2018 - National Acad Sciences
We introduce a remote interface to control and optimize the experimental production of Bose–
Einstein condensates (BECs) and find improved solutions using two distinct …
Einstein condensates (BECs) and find improved solutions using two distinct …
Experimental demonstration of shaken-lattice interferometry
CA Weidner, DZ Anderson - Physical Review Letters, 2018 - APS
We experimentally demonstrate a shaken-lattice interferometer. Atoms are trapped in the
ground Bloch state of a red-detuned optical lattice. Using a closed-loop optimization protocol …
ground Bloch state of a red-detuned optical lattice. Using a closed-loop optimization protocol …
Approaching the adiabatic timescale with machine learning
The control and manipulation of quantum systems without excitation are challenging, due to
the complexities in fully modeling such systems accurately and the difficulties in controlling …
the complexities in fully modeling such systems accurately and the difficulties in controlling …
Non-equilibrium scale invariance and shortcuts to adiabaticity in a one-dimensional Bose gas
W Rohringer, D Fischer, F Steiner, IE Mazets… - Scientific reports, 2015 - nature.com
We present experimental evidence for scale invariant behaviour of the excitation spectrum in
phase-fluctuating quasi-1d Bose gases after a rapid change of the external trap** …
phase-fluctuating quasi-1d Bose gases after a rapid change of the external trap** …
Vibrational state inversion of a Bose–Einstein condensate: optimal control and state tomography
R Bücker, T Berrada, S Van Frank… - Journal of Physics B …, 2013 - iopscience.iop.org
We present theoretical and experimental results on high-fidelity transfer of a trapped Bose–
Einstein condensate into its first vibrationally excited eigenstate. The excitation is driven by …
Einstein condensate into its first vibrationally excited eigenstate. The excitation is driven by …
Optimal control of superconducting gmon qubits using Pontryagin's minimum principle: Preparing a maximally entangled state with singular bang-bang protocols
S Bao, S Kleer, R Wang, A Rahmani - Physical Review A, 2018 - APS
We apply the theory of optimal control to the dynamics of two “gmon” qubits, with the goal of
preparing a desired entangled ground state from an initial unentangled one. Given an initial …
preparing a desired entangled ground state from an initial unentangled one. Given an initial …