Welcome to the Quantum Networks team at LKB!
Some recent PAPERS
High-efficiency WSi superconducting nanowire single-photon detectors for quantum state engineering in the near infrared
Large Bragg reflection from one-dimensional chains of trapped atoms near a nanoscale waveguide
PRL in press (arXiv)
Quantum state engineering with time-separated heraldings from a cw source: a temporal mode analysis
Phys. Rev. A 93, 013838 (2016)
Storage and retrieval of vector beams of light in a multiple-degree of-freedom quantum memory
Nature Com. 6, 7706 (2015)
Optical synthesis of large-amplitude squeezed coherent-state superpositions with minimal resources
Phys. Rev. Lett. 115, 023602 (2015)
Demonstration of a memory for tightly guided light in an optical nanofiber
Phys. Rev. Lett. 114, 180503 (2015)
Remote creation of hybrid entanglement between particle-like and wave-like optical qubits
Nature Photonics 8, 570 (2014)
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.
Interested in quantum optics and quantum information science? We are always happy to welcome motivated undergraduates, PhD students and Postdocs. Contact Prof. Laurat for openings.
The team has recently managed to store light that propagates in an optical fiber and to release it later on demand. By causing interaction between the traveling light and a few thousand atoms in the vicinity, we demonstrated an all-fibered memory. At the core of the device is a fiber with a short section elongated to 400 nm in diameter where the light can efficiently interact with a cloud of laser-cooled atoms. Using the so-called electromagnetically induced transparency technique, well-known in free space but combined for the first time with a fiber, we slowed down the light by 3000-fold and then halted it completely. Later, the light was released into the fiber, reconstituting the initial encoded information that can once again travel. All that was performed at the single photon level with a signal to noise ratio above 20 !
July 25, 2016 – Our new paper on high-efficiency superconducting detectors is posted on arXiv !
July 15, 2016 – Our paper on Bragg reflection with nanofiber-trapped atoms is accepted in PRL!
July 4, 2016 – Two talks at QCMC. Hana about Optical hybrid quantum information and Neil about our nanofiber experiments!
Jun. 27, 2016 – Julien is giving an invited talk at CEWQO, at OAC.
Apr. 18, 2016 – Julien is visiting Furusawa's lab for one week.
Apr. 8, 2016 – Our nanofiber memory featured in OPN this month: A Photonic Upgrade for Computer Memory.
Feb. 16, 2016 – Photonics West at San Francisco ! Invited talk in the Slow Light session about our nanofiber work.
Feb. 11, 2016 –Baptiste defended his PhD!
Congratulations Dr. Gouraud!
Jan. 3, 2016 –Julien is at PQE 2016, Snowbird. Good snow and great meeting!
Nov. 29, 2015 –Our nanofiber memory highlighted in Optics in 2015 by Optics and Photonics News.