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 …

Unifying quantum and classical speed limits on observables

LP García-Pintos, SB Nicholson, JR Green… - Physical Review X, 2022 - APS
The presence of noise or the interaction with an environment can radically change the
dynamics of observables of an otherwise isolated quantum system. We derive a bound on …

In Situ Thermometry of a Cold Fermi Gas via Dephasing Impurities

MT Mitchison, T Fogarty, G Guarnieri, S Campbell… - Physical Review Letters, 2020 - APS
The precise measurement of low temperatures is a challenging, important, and fundamental
task for quantum science. In particular, in situ thermometry is highly desirable for cold atomic …

Topological speed limit

T Van Vu, K Saito - Physical review letters, 2023 - APS
Any physical system evolves at a finite speed that is constrained not only by the energetic
cost but also by the topological structure of the underlying dynamics. In this Letter, by …

Geometric operator quantum speed limit, Wegner Hamiltonian flow and operator growth

N Hörnedal, N Carabba, K Takahashi… - Quantum, 2023 - quantum-journal.org
Quantum speed limits (QSLs) provide lower bounds on the minimum time required for a
process to unfold by using a distance between quantum states and identifying the speed of …

From quantum speed limits to energy-efficient quantum gates

M Aifer, S Deffner - New Journal of Physics, 2022 - iopscience.iop.org
While recent breakthroughs in quantum computing promise the nascence of the quantum
information age, quantum states remain delicate to control. Moreover, the required energy …

Action quantum speed limits

E O'Connor, G Guarnieri, S Campbell - Physical Review A, 2021 - APS
We introduce action quantum speed limits (QSLs) as a family of bounds on the minimal time
to connect two states that, unlike the usual geometric approach, crucially depend on how the …

Floquet dynamical quantum phase transition in the extended XY model: Nonadiabatic to adiabatic topological transition

S Zamani, R Jafari, A Langari - Physical Review B, 2020 - APS
We investigate both pure and mixed states Floquet dynamical quantum phase transition
(DQPT) in the periodically time-dependent extended XY model. We exactly show that the …

Quantum speed limit quantified by the changing rate of phase

S Sun, Y Peng, X Hu, Y Zheng - Physical Review Letters, 2021 - APS
The quantum speed limit is important in determining the minimum evolution time of a
quantum system, and thus is essential for quantum community. In this Letter, we derive a …