Welcome to the Quantum Networks team at LKB!
Some PAPERS
Nanotrappy: a versatile open-source package for cold-atom trapping close to nanostructures
Phys. Rev. Research 4, 013079 (2022)
Experimental Fock-state bunching capability of non-ideal single-photon states
Optica 8, 743 (2021)
Reduced volume and reflection for bright tweezers with radial LG beams
PNAS 117, 26109 (2020)
Efficient reversible entanglement transfer between light and quantum memories
Optica 7, 1440 (2020)
Connecting heterogeneous quantum networks by hybrid entanglement swapping
Science Advances 6, eaba4508 (2020)
Extremely subradiant states in a periodic 1D atomic array
Phys. Rev. A 100, 063832 (2019)
Engineering hybrid entanglement between discrete- and continuous-variable states
New. J. Phys. 21, 083033 (2019)
Waveguide-coupled single
collective excitation of
atomic arrays
Nature 566, 359 (2019)
pdf here
Demonstration of EPR Steering Using Hybrid Continuous-
and Discrete-Variable Entanglement of Light
Phys. Rev. Lett 121, 170403 (2018)
Remote preparation of continuous-variable qubits using loss-tolerant hybrid entanglement of light
Optica 5, 1012 (2018)
Highly-efficient quantum memory for polarization qubits in a spatially-multiplexed cold atomic ensemble
Nature Com. 9, 363 (2018)
ABOUT THE LAB
The team focuses on experimental and theoretical researches to develop the scientific and technical abilities for the realization of quantum networks, with applications to the distribution and processing of quantum information. These works include the development of light-matter interfaces for quantum data storage, the generation, characterization and manipulation of various non-classical states of light, and the implementation of networking protocols using these resources.This research involves fundamental and more applied studies in quantum optics, light-matter interaction, non-linear optics, photon detection and nanophotonics.
We are part of PCQC, the Paris Center for Quantum Computing, of the DIM Sirteq on Quantum Technologies and Partner of the Quantum Internet Alliance QIA, Quantera Project ShoQC and Twinning NonGauss training program.
Interested in quantum optics and quantum information science? We are always happy to welcome motivated undergraduates, PhD students and Postdocs. We have open positions in our different labs, contact us !
NEWS
The team has succeeded in creating a wired atomic entangled state that can be stored and later read out as a guided single photon. At the core of the device is an atomic register composed of a chain of individual cesium atoms tightly trapped along a nanofiber. Using a heralded method, we generated a collective entangled state with one ‘spin-flip’ excitation shared among the whole atomic chain. To retrieve the stored information, an external read pulse is sent to the atomic ensemble and results in the emission of a single photon into the fiber. This scheme offers a fiber-addressable single collective excitation in an atomic register with on-demand readout.
This work is now published in Nature “Waveguide-coupled single collective excitation of atomic arrays”. See the story in Phys.org. It follows previous works done in the group in this context, including the demonstration of stopped light in a nanofiber (published in PRL, Selected by Optics and Photonics News in Optics in 2015) or the realization of a Bragg mirror (PRL).
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Julien Laurat was a speaker today at the @InQuantumTech The Hague in the "Prospects for a Quantum Repeater" panel.… https://t.co/sgBP22fcNI -
This week, our PI Julien Laurat delivers a talk (remotely) at #OFC23 San Diego, in the special symposium on Quantum… https://t.co/PC2v2OciP1
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🚀Welinq, a spin-off from our group and hosted at @Sorbonne_Univ_! All the best to https://t.co/win63pGLDY! 📰See th… https://t.co/N5E94dzyiG
GROUP NEWS
July 11th, 2022 – Meet many of us at QCMC 2022!
June 27 & 28th, 2022 – So happy to organize the NonGauss workshop at SU !
June 1st, 2022 – Julien is now a Senior Member of the Institut Universitaire de France! Congrats!!!
March 28th, 2022 – Congrats Dr. Félix Hoffet! Such a great work to achieve a highly-efficient memory!
Feb. 15th, 2022 – Julien will be a panelist at IQT The Hague on Feb. 22! Quantum repeaters and memories!
Feb. 1st, 2022 – Our nanotrapy open source package is now presented in our published PRR paper !
Oct. 19, 2021 – ICQOM 2021 organised by our group and LIP6 starts today on the SU campus ! See you there!
Jun. 30, 2021 – Congrats Dr. Tom Darras! A great PhD work about hybrid entanglement of light!
Jun. 21, 2021 – Four talks from our group at CLEO this week ! See you online !
May 17, 2021 – Our bunching capability paper is now online in Optica! A great collaboration with Olomouc !
Dec. 4, 2020 – A story about our 90% efficient quantum memory in IEEE Spectrum!
June 2nd , 2020 – The story about our swapping paper! Connecting the quantum internet!
June 1st , 2020 – Our hybrid swapping paper is now online in Science Advances!
February 1st , 2020 – Our paper on radial-mode based tweezers is now on arXiv. Nice collaboration with Kimble’s group at Caltech!
