Atoms few, damned but quick... Magnetic fields sources, RF antennas, optical structures, all integrated in a micro-chip with a Bose-Einstein condensate a few hundred microns from the surface: an "Atom chip". The benefits are higher trap frequencies, shorter evaporative time, better atom-field coupling plus a much (much) cheaper set-up. The goal of our experiment is to make the best use of Atom chips for quantum technological applications.

Quantum Zeno dynamics

It is generally impossible to probe a quantum system without disturbing it. However, it is possible to exploit the back-action of quantum measurements and strong couplings to tailor and protect the coherent evolution of a quantum system. This is a profound and counterintuitive phenomenon known as quantum Zeno dynamics (QZD). Here we demonstrate QZD with a rubidium Bose-Einstein condensate in a five-level Hilbert space. We harness measurements and strong couplings to dynamically disconnect different groups of quantum states and constrain the atoms to coherently evolve inside a two-level subregion. In parallel to the foundational importance due to the realization of a dynamical superselection rule and the theory of quantum measurements, this is an important step forward in protecting and controlling quantum dynamics and, broadly speaking, quantum information processing.

F. Schӓfer et al.,
Experimental realization of quantum zeno dynamics
Nat. Commun. 5, 3194 (2014)

S. Gherardini et al.,
Ergodicity in randomly perturbed quantum systems
arXiv:1604.08518 (2016)

Micro-Rb people

Hoang-Van Do
PhD student
Cosimo Lovecchio
Postdoc
Francesco Saverio
Cataliotti

Scientific staff
Former members:
Saverio Bartalini
Shahid Cherukattil
Luigi Consolino
Vera Guarrera
Ivan Herrera
Pietro Lombardi
Ali Khan Murtaza
Jovana Petrovic
Florian Schäfer

Micro-Rb contacts

For further information, request of material, job opportunities, please contact:

Francesco Saverio Cataliotti
(fsc@lens.unifi.it)

Micro-Rb funding

FIRB Futuro in Ricerca
2008 HYTEQ
PRIN2010-2011