General Presentation
Our group studies the collective properties of trapped and cooled ions in the general context of quantum information.
Quantum information is a field of research which appeared approximately a decade ago and regroups specialists of various domains, computer science and information theory, physics, chemistry. The goal of this research is to obtain method to treat or carry information which are more efficient but impossible or at least very hard for classical systems. In order to achieve this goal, one uses the astonishing or counter-intuitive properties of quantum mechanics, superposition principle, entanglement... Quantum calculation should allow to perform operations, such as factorisation or database search, faster than our classical computers. Quantum networks for their part, beside connecting quantum computers, allow perfectly secure communication protocols.
Trapped ions are an efficient medium to implement quantum functions: they can be controlled individually, and with a very good precision (position, speed,...) and can be easily and efficiently manipulated by laser beams while being largely decoupled from their environment. Most operations necessary for the operation of a quantum computer have thus been demonstrated with trapped ions: realisation of qubits and their manipulation by logic gates, demonstration of error correcting codes...
Our approach is based on the use of ensemble of ions of which we do not manipulate the movement as is the case for most experiments. We are developping several themes around this general idea:
You can find a selection of our publications here as well as open positions for short stays there.
Our group consists of three permanent members, Thomas Coudreau (assistant professor at Université Paris 7), Samuel Guibal and Luca Guidoni (researchers at CNRS). Our research takes place, for the moment, on the Jussieu campus, corridor 24-25, 1st floor (one level above the campus level, use tower 24). As of september'06, the group also counts on two other members, Perola Milman (post-doc University Paris 7) and Sébastien Rémoville (PhD student).
Thomas Coudreau: thomas.coudreau[at]spectro.jussieu.fr (replace [at] by @)
Samuel Guibal: samuel.guibal[at]paris7.jussieu.fr (replace [at] by @)
Luca Guidoni: luca.guidoni[at]paris7.jussieu.fr (replace [at] by @)
Perola Milman:perola.milman[at]lri.fr
Sébastien Rémoville:sremovil[at]yahoo.fr
