Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe
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 …
fields that accomplish given tasks in the operation of a quantum device in the best way …
Introduction to the Pontryagin maximum principle for quantum optimal control
Optimal control theory is a powerful mathematical tool, which has known a rapid
development since the 1950s, mainly for engineering applications. More recently, it has …
development since the 1950s, mainly for engineering applications. More recently, it has …
Differentiable quantum architecture search
Quantum architecture search (QAS) is the process of automating architecture engineering of
quantum circuits. It has been desired to construct a powerful and general QAS platform …
quantum circuits. It has been desired to construct a powerful and general QAS platform …
From pulses to circuits and back again: A quantum optimal control perspective on variational quantum algorithms
The last decade has witnessed remarkable progress in the development of quantum
technologies. Although fault-tolerant devices likely remain years away, the noisy …
technologies. Although fault-tolerant devices likely remain years away, the noisy …
Optimal protocols in quantum annealing and quantum approximate optimization algorithm problems
Quantum annealing (QA) and the quantum approximate optimization algorithm (QAOA) are
two special cases of the following control problem: apply a combination of two Hamiltonians …
two special cases of the following control problem: apply a combination of two Hamiltonians …
[HTML][HTML] Time-optimal two-and three-qubit gates for Rydberg atoms
We identify time-optimal laser pulses to implement the controlled-Z gate and its three qubit
generalization, the C $ _2 $ Z gate, for Rydberg atoms in the blockade regime. Pulses are …
generalization, the C $ _2 $ Z gate, for Rydberg atoms in the blockade regime. Pulses are …
Optimal control for quantum optimization of closed and open systems
Optimization is one of the key applications of quantum computing where a quantum
speedup has been an eagerly anticipated outcome. A promising approach to optimization …
speedup has been an eagerly anticipated outcome. A promising approach to optimization …
[HTML][HTML] Binary control pulse optimization for quantum systems
Quantum control aims to manipulate quantum systems toward specific quantum states or
desired operations. Designing highly accurate and effective control steps is vitally important …
desired operations. Designing highly accurate and effective control steps is vitally important …
Behavior of analog quantum algorithms
Analog quantum algorithms are formulated in terms of Hamiltonians rather than unitary
gates and include quantum adiabatic computing, quantum annealing, and the quantum …
gates and include quantum adiabatic computing, quantum annealing, and the quantum …
Leakage reduces device coherence demands for pulse-level molecular simulations
Quantum simulation on noisy intermediate-scale quantum devices is severely limited by
short qubit coherence times. A variational pulse-shaping algorithm known as ctrl-VQE was …
short qubit coherence times. A variational pulse-shaping algorithm known as ctrl-VQE was …