09/07/2025

News > Job > Offre de thèse
PhD position – Soliton gas within 1D quantum gases

Laboratory : LPL - Laboratoire de Physique des Lasers
Place : Université Sorbonne Paris Nord
Wage : 2200€
Manager : aurelien.perrin@univ-paris13.fr

Duration: 36 months

Starting date: October, 6

The Bose-Einstein condensate group of the Laboratoire de Physique des Lasers (CNRS/Université Sorbonne Paris Nord) is an expert in the out of equilibrium physics of quantum gases. We offer a PhD position to work on the sodium project, where we produce degenerate quantum gases on top of an
atom chip. The extremely elongated trap geometry offered by the chip design allows to reach the unidimensional regime.


The aim of the PhD project is to demonstrate the presence of solitons in one-dimensional weakly interacting Bose gases at finite temperature or following dynamic excitation. The gas can be described by a wave function, or equivalently by a density and a phase. A soliton corresponds to a local density depletion that propagates within the gas without dispersion. The presence of solitons in the system can be revealed by direct imaging or by the shape of the gas velocity distribution. The objective of this thesis project is to study the out-of-equilibrium dynamics of a weakly interacting Bose gas confined in a box trap under strong excitation, and to evidence the presence of solitons in the gas. While the project is mainly experimental, it may also include numerical simulations of these phenomena.

  • University Sorbonne Paris Nord campus is located less than 30 minutes from the center of Paris.
  • The team currently comprises a PhD, a postdoc and three researchers.
  • The laboratory hosts four other ultra-cold atom experiments and various physics projects including
    fundamental ones and applications. Electronic, mechanical and optical workshops support our
    activities.
04/07/2025

News > Headline
The TUPHO project joins the CNRS RISE program

TUPHO, the valorization project led by Hamidreza Neshasteh and Ivan Favero of the Quantum Materials and Phenomena Laboratory (MPQ), supported in 2024 by the DIM QuanTiP is now a winner of the CNRS Innovation RISE program.

RISE is a support program for the creation of deeptech start-ups run by CNRS Innovation. This year, eleven projects have been selected to benefit from the help of a mentor and teams of experts to best develop their business.

This is the framework within which TUPHO will evolve, for the large-scale production of integrated photonic circuits. This project is an initiative that aims to bridge the gap between upstream innovation and large-scale production in the photonic integrated circuit (PIC) industry. Although PICs have the potential to revolutionize fields such as sensing, quantum technologies, computing and telecommunications – by offering increased performance, reduced power consumption and lower costs – their industrialization remains limited due to very low production yields caused by manufacturing imperfections. Even if manufacturing dimensional errors are today only a few nanometers, they still need to be minimized down to the picometer scale to achieve functional device yields in excess of 90%. The TUPHO project tackles this critical bottleneck with a patented post-fabrication technique that permanently corrects manufacturing errors at wafer scale. This method enables photonic devices to be fine-tuned with unrivalled precision – to picometer scale and below – paving the way for large-scale production with high yields for the PIC industry.

05/06/2025

News > Event
Effervesciences Day

29
juin
2025
14:00:00 - 18:00:00

Place : Médiathèque Jacques Chirac, Troyes Centre Boulevard Gambetta 10000 TROYES

Website

On the occasion of the 2025 General Congress of the French Physical Society, the day before the conference is dedicated to the public and mediation.

In this context, the QuanTiP DIM leaves the Île-de-France region and sets down its bags in Aube for a day of mediation. In our luggage, our trusty “Pinces optiques” manipulators and the “Lasermaze” board game!

It’s also a great opportunity to present our network to researchers from all over France!

05/06/2025

News > Event
Double•Science Festival

14
juin
2025
-
15
juin
2025
12:00:00 - 18:00:00

Place : Ground Control, 81 Rue du Charolais, 75012 Paris

Website

In 2025, the DIM QuanTiP is present at the double science festival! Brace yourselves for two days of intense mediation and scientific culture!

Double-Science returns June 14 and 15, 2025 at Ground Control (Paris) for an even more ambitious third edition!

Free of charge and open to all ages, Double-Science is a transdisciplinary festival dedicated to popularizing science in new cultural and immersive formats.

Developed in conjunction with leading institutions (Universities, CNRS, Inserm, etc.), it promotes scientific research by making it accessible, participative and fun, around key themes such as climate change, health, artificial intelligence and misinformation.

There are no formal conferences here: the festival explores new formats to reconnect the public with science: science-infused concerts, interactive theater, giant escape games, participatory workshops, immersive games, creative debates…

Double-Science is held in the Ground Control, a committed third-party cultural venue, to break with traditional codes and reinvent the dialogue between science and society.

20/05/2025

News > Headline
International EPR Society (IES) medals

The winners of the International EPR Society medals have been announced, including Patrice Bertet, CEA researcher and member of the QuanTiP DIM steering committee!

Founded in the late 1980s, the International EPR Society federates a network of scientists working on electron paramagnetic resonance (EPR) spectroscopy and electron spin resonance (ESR).

For over thirty years, the IES has made it a point of honor to lead the scientific community by promoting the exchange of information between universities, government and industry, as well as by harmonizing voices and discourses with other societies, funding agencies and international scientific organizations.

Every year, the IES awards medals to projects according to the field of application of their research: biology/medicine, chemistry, instrumentation, physics/instrumentation, physics/materials science.

In 2025, Patrice Bertet (CEA, Université Paris-Saclay) was awarded the Physics/Materials Science medal for his fundamental observations of spin resonance phenomena, as well as profound technological developments in the field of spin sensitivity.

19/05/2025

News > Publication
Quantum Gas Microscopy of Fermions in the Continuum

The Fermi Gas team at Laboratoire Kastler Brossel recently published an article in Physical Review Letter.

  • Tim DE JONGH
  • Joris VERSTRATEN
  • Maxime DIXMERIAS
  • Cyprien DAIX
  • Bruno PEAUDECERF
  • Tarik YEFSAH

Atom-based quantum simulators offer a unique platform that enables the imaging of each particle in a many-body system. Until now, however, this capability has been limited to quantum systems in discretized space such as optical lattices and tweezers, where spatial degrees of freedom are quantized. Here, we introduce a novel method for imaging atomic quantum many-body systems in the continuum, allowing for in situ resolution of every particle. We demonstrate the capabilities of our approach on a two-dimensional atomic Fermi gas. We probe the density correlation functions, resolving their full spatial functional form, and reveal the shape of the Fermi hole arising from Pauli exclusion as a function of temperature. Our method opens the door to probing strongly correlated quantum gases in the continuum with unprecedented spatial resolution, providing in situ access to spatially resolved correlation functions of arbitrarily high order across the entire system.

© Tim de Jongh et al, Phys. Rev. Lett. 2025.

Figure 1: Image of a Fermionic Quantum Gas. Each blue dot represents a single atom. Instead of bunching together, the atoms are seen to avoid each other due to the Pauli Exclusion Principle.

15/05/2025

News > Job > Offre de post-doc
Postdoctoral position in quantum gases

Laboratory : LPL - Laboratoire de Physique des Lasers
Place : Université Sorbonne Paris Nord
Manager : Laurent Vernac : laurent.vernac@univ-paris13.fr

Duration: 15 months (ANR funding)
Starting date: September 1st, 2025

The Magnetic Quantum Gases (GQM) group of LPL offers a postdoctoral position in the field
of dipolar quantum gas experiment using chromium atoms. Magnetic atoms, which can be
loaded in optical lattices in a low-entropy state, provide a highly relevant platform for the study
of quantum magnetism. The host team studies out-of-equilibrium dynamics of long-range
interacting spin systems, and in particular seeks to measure the development of entanglement
linked to the phenomenon of quantum thermalization. The person recruited will first contribute to the assembly of the new UHV experiment chamber, and to the installation of the new laser cooling and trapping system. He/she will play a leading role in obtaining a BEC, then in loading it into an optical lattice, and will set up the new tools the team has planned in order to obtain new results on the physics of interacting N-body systems: adaptive optics, in order to explore new trapping geometries; in-vacuum RF coils to better control RF transitions; measurement of the magnetic field close to the atoms by
spectroscopy.


Two teacher-researchers, a CNRS researcher, and a CNRS research engineer are involved in
the project. We have established fruitful collaborations with theorists for the interpretation of
our results.

The candidate must have a solid experience in cold atoms experiment, in particular in optics
and light-matter interactions

Probing Coherences and Itinerant Magnetism in a Dipolar Lattice Gas, Thomas Lauprêtre et al,
arXiv:2501.11402 (2025)
Measuring bipartite spin correlations of lattice-trapped dipolar atoms, Youssef Aziz Alaoui et
al, Phys. Rev. Lett. 133, 203401 (2024)

14/04/2025

News > Event
Webinar : all about the Residential school for entrepreneurship

28
avril
2025
15:00:00 - 16:00:00

Place : En ligne

We are pleased to invite you to a webinar presenting the residential school for entrepreneurship.

This webinar will take place on April 28, 2025 at 3 p.m. and will be hosted by Eric Langrognet, who has been providing entrepreneurship training for several years. Alumni of the residential school will also be on hand to share their experiences and post-training journeys.

To register for the webinar: send us an e-mail with your last name, first name, status, lab – a connection link will be sent to you 2-3 days in advance. Feel free to send us your comments and/or questions for the webinar.

As a reminder, the residential entrepreneurship school will take place from June 10 to 13, 2025, at Domaine de Saint-Paul, 102 route de Limours, 78470 Saint-Rémy-lès-Chevreuse. Registrations will be open until May 31, 2025.

19/03/2025

News > Headline
Quantum sensation: the must-see spring exhibition

Mysterious, abstract and counter-intuitive, quantum physics stimulates our minds. Aurore, Caroline and Céline, physicist, artist and philosopher, have joined forces to create a multisensory exhibition shedding light on quantum science research.

Drawing on the experiments of Aurore-Alice Young, a doctoral student at the Kastler Brossel laboratory, Caroline Delétoille brings her artist’s eye to bear on current research. These observations come to life in the form of sound devices and paintings at the Maison Poincaré from April 10 to July 26, 2025.

At the heart of these artistic productions is the creation of a cramped parallel between quantum physics and memory. An artistic-scientific feat sure to awaken your senses and transport you into the lively world of research.

10/03/2025

News > Event
Webinar: understand everything on Calls for projects

27
mars
2025
10:00:00 - 11:00:00

The QuanTiP DIM is organizing a webinar to present the various calls for projects (AAP) for equipment issued by the DIM and the Île-de-France Region, and to answer your questions on the subject.

In this webinar, you’ll be able to hear about QuanTiP’s AAPs (AAP ML & PME) and those of the Région ÎdF (SESAME Filières, etc.), as well as some feedback. There will also be a Question & Answer session to discuss anything you find difficult to understand.

To register, send an e-mail with your surname, first name, status and lab to quantip@univ-paris13.fr .

You can also attach your initial questions to this e-mail, which we’ll be sure to answer during the webinar.