Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

CP Koch, U Boscain, T Calarco, G Dirr… - EPJ Quantum …, 2022 - epjqt.epj.org
Quantum optimal control, a toolbox for devising and implementing the shapes of external
fields that accomplish given tasks in the operation of a quantum device in the best way …

Artificial intelligence and machine learning for quantum technologies

M Krenn, J Landgraf, T Foesel, F Marquardt - Physical Review A, 2023 - APS
In recent years the dramatic progress in machine learning has begun to impact many areas
of science and technology significantly. In the present perspective article, we explore how …

Experimental Realization of a Protected Superconducting Circuit Derived from the Qubit

A Gyenis, PS Mundada, A Di Paolo, TM Hazard, X You… - PRX Quantum, 2021 - APS
Encoding a qubit in logical quantum states with wave functions characterized by disjoint
support and robust energies can offer simultaneous protection against relaxation and pure …

Gradient-ascent pulse engineering with feedback

R Porotti, V Peano, F Marquardt - PRX Quantum, 2023 - APS
Efficient approaches to quantum control and feedback are essential for quantum
technologies, from sensing to quantum computation. Open-loop control tasks have been …

Reinforcement learning-enhanced protocols for coherent population-transfer in three-level quantum systems

J Brown, P Sgroi, L Giannelli, GS Paraoanu… - New Journal of …, 2021 - iopscience.iop.org
We deploy a combination of reinforcement learning-based approaches and more traditional
optimization techniques to identify optimal protocols for population transfer in a multi-level …

Entangling transmons with low-frequency protected superconducting qubits

A Maiani, M Kjaergaard, C Schrade - PRX Quantum, 2022 - APS
Novel qubits with intrinsic noise protection constitute a promising route for improving the
coherence of quantum information in superconducting circuits. However, many protected …

A shortcut tour of quantum control methods for modern quantum technologies

D Stefanatos, E Paspalakis - Europhysics Letters, 2021 - iopscience.iop.org
Quantum control methods, like rapid adiabatic passage, stimulated Raman adiabatic
passage, shortcuts to adiabaticity and optimal control, have become an integral part of …

Minimum quantum run-time characterization and calibration via restless measurements with dynamic repetition rates

C Tornow, N Kanazawa, WE Shanks, DJ Egger - Physical Review Applied, 2022 - APS
The performance of a quantum processor depends on the characteristics of the device and
the quality of the control pulses. Characterizing cloud-based quantum computers and …

Proposal for entangling gates on fluxonium qubits via a two-photon transition

KN Nesterov, Q Ficheux, VE Manucharyan, MG Vavilov - PRX Quantum, 2021 - APS
We propose a family of microwave-activated entangling gates on two capacitively coupled
fluxonium qubits. A microwave pulse applied to either qubit at a frequency near the half …

ScaleQC: A scalable framework for hybrid computation on quantum and classical processors

W Tang, M Martonosi - arXiv preprint arXiv:2207.00933, 2022 - arxiv.org
Quantum processing unit (QPU) has to satisfy highly demanding quantity and quality
requirements on its qubits to produce accurate results for problems at useful scales …