Welcome to the Quantum Networks team at LKB!
collective excitation of
Nature (advanced online publication, 4 Feb. 2019)
Demonstration of Einstein-Podolsky-Rosen 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)
Slowing quantum decoherence by squeezing in phase space
Phys. Rev. Lett. 120, 073603 (2018)
Large Bragg reflection from one-dimensional chains of trapped atoms near a nanoscale waveguide
Phys. Rev. Lett. 117, 133603 (2016)
Storage and retrieval of vector beams of light in a multiple-degree of-freedom quantum memory
Nature Com. 6, 7706 (2015
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.
Interested in quantum optics and quantum information science? We are always happy to welcome motivated undergraduates, PhD students and Postdocs. Two postdoc positions are now open !
The team has recently 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).
February 4 , 2019 – Our Nature paper is now online! Congrats to all the team!
December 31 , 2018 – Welcome Adrien! Happy First Year!
December 10 , 2018 – Mingtao and Felix at the kick-off meeting of QIA!
November 9 , 2018 – Congrats Tom! Poster prize at the Sirteq meeting!
October 28 , 2018 – Our Quantum Internet Alliance QIA flagship is officially launched!
October 26 , 2018 – Our PRL on hybrid steering is now online ! A great collaboration!
August 20 , 2018 – Our Optica on remote state preparation is published. Congrats to the Hybrid Photonics Team !
June 14, 2018 – A News and Views written by Julien about two papers "Entanglement on demand" ! Congrats to Ronald's and Andreas' team !
Feb. 13, 2018 – Our PRL on slowing decoherence by squeezing in online. Congrats to the team and thank you Radim for the collaboration.
Jan. 25, 2018 – Our Nature Communications on highly efficient quantum memory is published! See the Press release and the Story!