@petrsteindl.bsky.social presented today the team’s efforts to measure the Wigner function of our single photons!

#QuiDiQua #C2N #WignerFunction

📄New paper on ArXiv!
💡By mixing single photons and laser light, you can adaptively boost the QKD secret key rate (SKR) for short distances, and stay in the pure single-photon regime for longer links.
🔗 @yportella.bsky.social & @dfioretto.bsky.social , arxiv.org/abs/2510.26337

#QKD #QD #QDLight #C2N

🎓Congratulations to Hubert Lam on the defense of his PhD yesterday! 🎉

In his PhD, he pushed the Wigner-function measurement technique to be compatible with our fast QD emission and, for the first time, measured the Wigner function of QD-based emitters! ✨

#C2N #PhD #WignerFunction

🔭 During Fête de la Science at C2N, we gave a tour of our quantum optics lab and showed simple light experiments illustrating the principles we use every day — from interference to quantum phenomena! 💡 #FêteDeLaScience #C2N #Optics

Congratulations to Adria Medeiros Garay on the defense of his PhD today! He presented some of his work on spin-photon interface in QD-cavity devices, showcasing how such systems could serve as a backbone for a future quantum network. Good luck in your next career step at ICFO!
#ICFO #C2N #PhD

🎤 Etienne presented at OECS 2025 new results showing coherence in photon-number basis enables measuring spin state of charged-exciton QDs — advancing spin-photon interfaces 🚀✨

#Quantum #QuantumDot #OECS2025 #QuantumPhotonics #C2N

Adrià presented our work on heralding of a single spin via giant polarization rotations in a QD-based spin-photon interface 🌀🧭 A step towards scalable spin-photon quantum networks!

#QuantuMatter2025 #QuantumPhotonics #SpinPhotonInterface #QuantumDots #SingleSpin #QuantumNetworks #C2N

Petr presented our work on optimizing direct single-photon Wigner-function measurement 🌀🔍 Improving and accelerating quantum state characterization for solid-state light sources and photonic quantum technologies.

#QuantuMatter2025 #QuantumOptics #WignerFunction #SinglePhotons #QuantumDots #C2N

Yann gave a talk on how combining laser light and single photons can extend the capabilities of QKD protocols 🔐✨ Pushing the boundaries of secure quantum communication!

#QuantuMatter2025 #QKD #QuantumCommunication #SinglePhotons #C2N

Thibaut presented our recent work on noise spectroscopy of a micropillar-based single-photon source 🔬📡 Deeper insight into noise mechanisms in our emitters - essential for scaling-up!

#QuantuMatter2025 #SinglePhotons #QuantumDot #Micropillar #NoiseSpectroscopy #C2N #Quandela

Lara presented her poster on spin-photon entanglement for the generation of multiphotonic graph states 🧵🧠 Exciting progress toward scalable photonic quantum computing!

#QuantuMatter2025#QuantumComputing #SpinPhotonEntanglement #GraphStates #QuantumDots #Photonics #C2N #Quandela

Hubert presented our work on Wigner function reconstruction of non-Gaussian superposition states emitted from a quantum dot 🌀 A key step in characterizing solid-state quantum light for photonic quantum technologies!
#QuantuMatter2025 #QuantumOptics #QuantumDot #WignerFunction #NonGaussian #C2N

Etienne just gave his first talk at Quantum Matter 2025 in Grenoble! He presented our work on generating Fock-encoded superpositions using QD-based single photon sources—promising for quantum computing, communication & spin characterization. 🎤🧠

#QuantuMatter2025 #QuantumComputing #QuantumDot #C2N

Elianor presented her poster on the generation of photonic cluster states with linear optics ✨🔗 Advancing entanglement generation!

#QuantuMatter2025 #QuantumComputing #ClusterStates #SinglePhotons #C2N #Quandela

Helio shared new results on deterministic and reconfigurable graph state generation with a solid-state quantum emitter 💡🔗 Exciting step toward scalable photonic quantum computing! Published in Nat. Comm. 16, 4337 (2025)!

#QuantuMatter2025 #QuantumComputing #GraphStates #QuantumDot #C2N

Back from QuantuMatter 2025 in Grenoble! We shared new results toward photonic quantum computing using semiconductor quantum dots.
Great discussions—thanks to the organizers! Stay tuned for more insight!
#QuantuMatter2025 #QuantumDot #SinglePhotons #QuantumComputing #QuantumCommunication #C2N

Relaxing and taking in the beautiful views of (and to) the lab after a productive week of experiments!

📷 : Juan Alvarez

#C2N #QuanTour #QTorch #SUPERquantum

C2N – Offres d'emploi Chaque année, des chercheurs, ingénieurs et techniciens candidatent sur des postes CNRS, Université Paris-Saclay ou Univeristé Paris Cité pour mener leur activité au sein du C2N. Les postes peuvent être des postes en CDD ou bien des postes permanents dans la fonction publique, via recrutement par concours auprès du CNRS ou de l'université.

#RejoignezleCNRS et le #C2N
2 concours Ingénieurs et Techniciens sont ouverts pour rejoindre le C2N, laboratoire phare en #nanosciences et en #nanotechnologies
➤ Ingénieur de Recherche (IR) concours n°32
➤ Assistant Ingénieur (AI) concours n°234
➤

x.com/CNRS/status/18… bit.ly/3F4NfiO

What is the cassette player that we are going to connect to our CBM128?

#Commodore #CBM #C128 #Cassette #CBM1530 #C2N #Datasette #PressPlayOnTape #PeaseWait #8bit #Atari #Joke #retrocomputer #retrogaming #videogames #80s #90s #Geek

Certified randomness in tight space Reliable randomness is a core ingredient in algorithms and applications ranging from numerical simulations to statistical sampling and cryptography. The outcomes of measurements on entangled...

Certified randomness in a tight space: Demonstration of compact certified random number generation by combining a bright single photon source from @Quandela_SAS and a reconfigurable photonic chip. #CNRS #C2N #Contextuality #Perceval

arxiv.org/abs/2301.03536

Good morning! Another splendorous sunny day in our Campus of Marcoussis. Have a nice week full of #quantumphotonics! 😃 #c2n #cnrs #quantumdots #marcoussis #quantumphysics #singlephotons #MondayMotivation

One long week of intense lab work... but many more nice single photons will be available soon... 😎🤫💡#welovephysics #quantumphysics #quantumoptics #quantumdots #cnrs #c2n

Accurate measurement of a 96% input coupling into a cavity using polarization tomography Pillar microcavities are excellent light-matter interfaces, providing an electromagnetic confinement in small mode volumes with high quality factors. They also

Check our paper, now available in APL, on the accurate measurement of our record light input coupling into a micropillar cavity, the optimal platform for light-matter interfacing!! #qd #photonics #quantumphysics #cnrs #c2n #quantumdots #quantumphotonics

aip.scitation.org/doi/10.1063/1.…

Yesterday, a day to remember! Lorenzo, we wish you all the best in your next destination 🙃

Jump if you like single indistinguishable photons! #c2n #cnrs #quantumdots #singlephotons #quantumoptics #cqed #quantumtechnologies

Happening now: Lorenzo De Santis presenting his PhD studies “Single photons generation and manipulation with semiconductor quantum dot devices” #soutenancethese #c2n #cnrs #quantumdots #singlephotons