News and Events
Measurement of the Equation of State of Superfluid Helium-4 at Negative Pressure, L. Djadaojee, Cédric Parisi, Camille Noûs, J. Grücker, J. Low Temp. Phys. (2023)
Brillouin spectroscopy of metastable superfluid helium-4, L. Djadaojee, J. Grücker, Phys. Rev. Lett. 129, 125301 (2022)
Zeyuan ZHANG has joined the group on Feb. 2022. She actively contributes to the HELPING project.
High field Enhancement of nucLear Polarisation In Noble Gases.
LKB (Coord. G. Tastevin) – NIMBE (Sc. Lead. G. Huber).
Nuclear hyperpolarization of ³He by magnetized plasmas, Maul A., Blümler P., Nacher P.-J., Otten E., Tastevin G., and Heil W., Phys. Rev. A (2018) 98, 063405 [12 pages]
Generating accurate tip angles for NMR outside the rotating-wave approximation, C.P. Bidinosti, G. Tastevin, P.-J. Nacher – J. Magn. reson. (2022) 345:1073062022 – arXiv:2209.03754 – hal-03765938 – Share link
Doppler-free spectroscopy of the lowest triplet states of helium using double optical resonance, A. Dia, M. Abboud, P.-J. Nacher, and G. Tastevin – Eur. Phys. J. D (2021) 75:223
Hadi LOUTFI has joined the group on Oct. 2021. He actively contributes to the MARGIN project.
Lionel DJADAOJEE (Teaching assistant at ENS Paris – PSL, Agrégé de Physique) has joined the group for PhD work on the metastable phases of solid and liquid 4He (J. Grücker, superviser; Sept. 2019 – …).
Philippe Jacquier, leader of the “Quantum solid and liquid helium” team since 2003, passed away on Jan.24, 2019.
Master 2 (2022-2023)
Study of Rabi oscillations using optically detected NMR in polarised helium gas
Pulses of resonant ac fields are generically used to control the internal state of 2-level systems. The driven travel on the Bloch sphere is a standard (but approximate!) textbook item. Optical monitoring of actual trajectories will provide new insight on recent NMR investigations of deviations due to (often unavoidable) additional components of the oscillating field. Download a 1-page description of the project. Please contact us for more information.
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2022 - PhD position (ANR funding)
Hyperpolarisation of ³He nuclear spin at high magnetic field
PhD position : Filled
Hyperpolarisation of 3He at low/moderate magnetic field
Skilled and motivated students are welcome to join our investigations of polarisation dynamics in He gas discharges at low and moderate magnetic fields. Type of work: Experimental, numerical, theoretical. (This topic is open for PhD). Please contact us for more information.
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Low field MRI - Polarised helium-3
Please have a look at this poster.
M2 position : Open
Skilled and motivated students are welcome to join our investigations on low field MRI with laser-polarised ³He gas or thermally-polarised water samples. Work may focus on the impact of concomitant field gradients on image quality. Another objective may be to investigate the short-pulse limit and revisit the Bloch-Siegert effect in pulsed NMR. (This topic is open for PhD.). Please contact us for more information.
Polarised helium - Liquid NMR
Skilled and motivated students are welcome to join the team for follow-up of our investigations on liquid NMR in laser polarised ³He-⁴He dilute solutions. Work will deal with the latest observations of non linear NMR dynamics and will focus on the comparison between experimental and numerical data. This topic is not open for PhD this year.
We are always looking for brillant motivated scientists to join our group.
Check the open positions (see above) or send us your CV for application.
Département de Physique Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05
- Jules Grucker : jules.grucker at lkb.ens.fr
- Franck Laloë : laloe at lkb.ens.fr
- Pierre-Jean Nacher : nacher at lkb.ens.fr
- Geneviève Tastevin : genevieve.tastevin at lkb.ens.fr