Switching controls for conservative bilinear quantum systems with discrete spectrum

N Boussaïd, M Caponigro, T Chambrion - SIAM Journal on Control and …, 2024 - SIAM
We analyze attainable sets of single-input bilinear conservative systems with piecewise
constant controls. Under the assumption that the ambient space admits a Hilbert basis made …

Stability guarantees for nonlinear discrete-time systems controlled by approximate value iteration

R Postoyan, M Granzotto, L Buşoniu… - 2019 IEEE 58th …, 2019 - ieeexplore.ieee.org
Value iteration is a method to generate optimal control inputs for generic nonlinear systems
and cost functions. Its implementation typically leads to approximation errors, which may …

Impulsive control of the bilinear Schrödinger equation: propagators and attainable sets

N Boussaid, M Caponigro… - 2019 IEEE 58th …, 2019 - ieeexplore.ieee.org
We consider a linear Schrödinger equation with an unbounded bilinear control term. The
control term is the derivative of function with bounded variations (impulsive control). Well …

On the controllability in projections for linear quantum systems

T Chambrion, N Boussaid, M Caponigro - arxiv preprint arxiv:2404.08290, 2024 - arxiv.org
We present sufficient conditions for the exact controllability in projection of the linear Schr {\"
o} dinger equations in the case where the spectrum of the free Hamiltonian is pure point. We …

On the bilinear control of the Gross-Pitaevskii equation

T Chambrion, L Thomann - Annales de l'Institut Henri Poincaré C, Analyse …, 2020 - Elsevier
In this paper we study the bilinear-control problem for the linear and non-linear Schrödinger
equation with harmonic potential. By the means of different examples, we show how space …

Topological Obstructions

W Jongeneel, E Moulay - … Obstructions to Stability and Stabilization: History …, 2023 - Springer
Given the previous chapters on topology and dynamical system theory, we can now provide
a consistent treatment of topological obstructions to stability and stabilization. In particular …

Controllability of quantum systems with relatively bounded control potentials*

N Boussaïd, M Caponigro, T Chambrion - … of the Conference on Control and …, 2023 - SIAM
We study the regularity of solutions of bilinear quantum systems of the type where the state x
belongs to some complex infinite dimensional Hilbert space, the (possibly unbounded) …

A remark on the attainable set of the Schr\" odinger equation

J Lampart - arxiv preprint arxiv:1904.00591, 2019 - arxiv.org
We discuss the set of wavefunctions $\psi_V (t) $ that can be obtained from a given initial
condition $\psi_0 $ by applying the flow of the Schr\" odinger operator $-\Delta+ V (t, x) $ and …

Finite dimensional Galerkin approximations for mildly-coupled bilinear quantum systems

N Boussaïd, M Caponigro, T Chambrion - 2024 - hal.science
Several infinite dimensional bilinear quantum systems encountered in the physics literature
can be described, with good precision, by appropriate finite dimensional approximations …

A Ball-Marsden-Slemrod type result for semi-linear equations with analytic semigroups

G Dirr - IFAC-PapersOnLine, 2022 - Elsevier
We extend a well-known non-controllability result of Ball, Marsden, and Slemrod on infinite-
dimensional bilinear systems (with bounded control term) to control-affine semi-linear …