Page modified Wednesday, October 08, 2014
Other news
59 ticket (s) in this blog.
25 ticket (s) in this blog.
10 ticket (s) in this blog.

Laser Physics Laboratory is affiliated both to CNRS and to University Paris 13. We study the interactions between light and matter.

Our experiments range from the most fundamental aspects of basic science to applied research: quantum physics, atomic and molecular physics, optical devices, biomedical imaging...

The lab is structured into eight experimental research teams, four shops and an administrative department. It is composed of about seventy-five people (10 CNRS full-time researchers, 30 university teaching staff members, a technical staff of 15 people, about 20 PhD students and post-docs), plus several short-term trainees and foreign visitors.

Olivier Gorceix,
Director of laboratory

Post-Doc position

The MMT group has an open position for a post-doc on ultrastable optical links:

Hybrid ultrastable links for clocks comparison

Out-of-equilibrium dynamics of multicomponent quantum gases

Theory-experiment comparisonThe “chromium team” (GQD) carried out the first experimental study of the formation dynamics of a multicomponent quantum gas. The theoretical interpretation evidences the importance of the competition between Bose-stimulation and spin-exchange interactions. Numerical simulations by polish colleagues (Polish Academy of Sciences and University of Bialystok) give strong support to this interpretation.

This work is published in Physical Review Letters and a preprint is available at arXiv:1607.02406


Record of precision for atomic clocks comparison over a 1400-km optical link

Research on optical fiber link performed by the group MMT of Laboratoire de physique des lasers (LPL, CNRS/Université Paris 13) and the laboratory Systèmes de référence temps-espace (SYRTE, CNRS/Observatoire de Paris/UPMC, associated to LNE), have just contributed to a new clock measurement with an unprecedented resolution. By linking Paris to Braunschweig (in Germany) with an optical fiber link of 1400 km, the ticking rates of two ultrastable optical clocks, developed at SYRTE and Physikalisch-Technische Bundesanstalt (PTB), and separated by 700 km, were compared. This comparison is 20 times more precise than what was achievable so far using GPS, and the measurement is 10 000 faster for the same resolution. The fractional frequency difference, of 2x10-15, is attributed to an effect of general relativity, which affects clocks at different heights (20 m difference).

The French part of the optical fiber link was established with the support of the French education and research network RENATER. The know-how on the equipment installed on the fiber network is now transmitted to three French companies in the frame of the project REFIMEVE+.

Record of precision for atomic clocks comparison over a 1400-km optical link

This work has been published in Nature Communications on 9 August 2016.

Read the article on Nature Communication’s website.

Press alert (in French).

Visit REFIMEVE+ website for more details.

See also other news below ...

General news of laboratory
59 ticket (s) in this blog.
Science news of the laboratory
25 ticket (s) in this blog.
The awards and honors members of the laboratory
10 ticket (s) in this blog.

© 1998 - 2016 Laboratoire de physique des lasers (LPL). All rights reserved.
Université Paris 13 (UP13) - Institut Galilée - CNRS LPL UMR7538
99, av. J.B. Clément - 93430 VILLETANEUSE - FRANCE
Logo IG
Logo UP13
Membre fondateur de
Logo PRES Sorbonne Paris Cité
Logo Campus Condorcet