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.

Steering and reversing quantum dynamics

Driving the complex dynamics of physical systems to perform a specific task is extremely useful but challenging in several fields of science, and especially for fragile quantum mechanical systems. Even harder, and often unfeasible, is to invert the time arrow of the dynamics, undoing some physical process. We theoretically and experimentally drive forth and back through several paths in the five-level Hilbert space of a Rubidium atom in the ground state. We achieve such an objective applying optimal control strategies to a Bose-Einstein condensate on an Atom chip via a frequency modulated RF field. We further prove that backward dynamical evolution does not correspond to simply inverting the time arrow of the driving field neglecting the only-system part of the dynamics. Apart from the relevance for the foundations of quantum mechanics, these results are important steps forward in the manipulation of quantum dynamics that is crucial for several physical implementations and very promisingly powerful quantum technologies.

C. Lovecchio et al.,
Optimal preparation of quantum states on an atom chip device
Phys. Rev. A 93, 010304(R) (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