Quantum Optics at ULiège

The group for Theoretical Quantum Optics, headed by Prof. John Martin since 2011, is part of the Atomic and Nuclear Physics pole of the University of Liège (Belgium), along with the Cold-atom Physics group (Prof. Thierry Bastin) and the Quantum Statistical Physics group (Prof. Peter Schlagheck). The Atomic and Nuclear Physics pole is part of a larger research unit named CESAM.

Our research activities revolve around quantum optics, cold atom physics, quantum information theory and quantum chaos. More specifically, we are interested in

❯❯   the consequences of the coupling between internal and external degrees of freedom of cold atoms, mainly in the context of open quantum systems,

❯❯   multipartite entanglement (its detection, classification and quantification) and non-classical correlations, in particular for multiqubit symmetric states and spin states,

❯❯   quantum chaos in Bose-Einstein condensates, multifractality of quantum wave functions, models displaying an Anderson delocalization-localization transition.




Our research in pictures


Geometric measure of entanglement
from Wehrl Moments using ANNs
Critical properties of the Anderson transition
in random graphs

Extreme depolarization of spin states
Symmetric Absolutely Separable states

Optimal quantum rotosensors
Anderson transition on random graphs

Husimi function of an anticoherent spin state
The queens of quantum

Quantum-enhanced measurement exploiting dissipation
Geometric entanglement of 4-qubit symmetric states

Superradiant pulse radiated by 30 indistinguishable atoms
Master equation for spontaneous emission by cold atoms

Poincaré section of a chaotic Bohmian trajectory
Genuinely entangled states without N-partite correlations


Our lab is located at the IPNAS (Institut de Physique Nucléaire, Atomique et de Spectroscopie), building B15, on the campus of Sart Tilman. See here for maps.

© ULiege 2022 - John Martin