Nanoscale Systems for Optical Quantum Technologies  

September 23, 2020

• Recently published results in ACS Nano have been highlighted in the research news of the CNRS National Chemistry Institute (INC).

September 15, 2019

• ​​​​​​"Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal" by Sacha Welinski, Alexey Tiranov, Moritz Businger, Alban Ferrier, Alban Ferrier and Philippe Goldner.

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August 25, 2020

• ​​​​​"A Frequency-Multiplexed Coherent Electro-optic Memory in Rare Earth Doped Nanoparticles"  by Alexandre Fossati, Shuping Liu, Jenny Karlsson, Akio Ikesue, Alexandre Tallaire, Alban Ferrier, Diana Serrano and Philippe Goldner.

August 17, 2020

• ​​​​​"Harnessing Atomic Layer Deposition and Diffusion to Spatially Localize Rare-Earth Ion Emitters"  by Aban Ferrier, Nao Harada, Marion Scarafagio, Emrick Briand, Jean-Jacques Ganem, Ian Vickridge, Antoine Seyeux, Philippe Marcus, Diana Serrano, Philippe Goldner and Alexandre Tallaire.

August 13, 2020

• ​​​​​"Fast electrical modulation of strong near-field interactions between erbium emitters and graphene"  by D. Cano, A. Ferrier, K. Soundarapandian, A. Reserbat-Plantey, M. Scarafagio, A. Tallaire, A. Seyeux, P. Marcus, H. de Riedmatten, P. Goldner, F. H. L. Koppens, K-J. Tielrooij. 

August 03, 2020

• ​​​​​"Chemically vapor deposited Eu3+:Y2O3 thin films as a material platform for quantum technologies" by N. Harada, A. Ferrier,  D. Serrano, M. Persechino, E. Briand,  R. Bachelet,  I. Vickridge, J-J. Ganem, P. Goldner and A. Tallaire.  

July 21, 2020

• ​​​​​"Defect Engineering for Quantum Grade Rare-Earth Nanocrystals"  by S. Liu, A, Fossati, D. Serrano, A. Tallaire, A. Ferrier, P. Goldner. 

May 05, 2020

• A summary of NanOQTech results has been published on the European Commission CORDIS website. Follow the link below to read the article. 

April 07, 2020

• ​​​​​​​"Mechanical tunability of an ultranarrow spectral feature of a rare-earth doped crystal via uniaxial stress"  by N. Galland, N. Lučić, B. Fang, S. Zhang, R. Le Targat, A. Ferrier, P. Goldner, S. Seidelin and Y. Le Coq.

March 17, 2020

• "Position- and momentum-squeezed quantum states in micro-scale mechanical resonators" by Yan Le Coq, Klaus Moelmer and Signe Seidelin

March 11, 2020

• ​​​​​​"Inhomogeneous response of an ion ensemble from mechanical stress"  by S. Zhang, N. Galland, N. Lučić, R. Le Targat, A. Ferrier, P. Goldner, B. Fang, Y. Le Coq, and S. Seidelin.

February 18, 2020

• ​​​​"Improving the Luminescent Properties of Atomic Layer Deposition Eu:Y2O3 Thin Films through Optimized Thermal Annealing"  by M. Scarafagio, A. Tallaire, M-H. Chavanne, M. Cassir, A. Ringuedé, D. Serrano, P. Goldner and A. Ferrier.

February 18, 2020

• ​​​​​​"Subradiant bound dimer excited states of emitter chains coupled to a one dimensional waveguide"  by Y-X. Zhang, C. Yu and K. Moelmer.

November 12, 2019

• ​​​​"Collective dynamics of inhomogeneously broadened emitters coupled to an optical cavity with narrow linewidth"  by K. Debnath, Y. Zhang, K. Moelmer.

November 12, 2019

• ​​​​​"Emerging rare-earth doped material platforms for quantum nanophotonics"  by T. Zhong and P. Goldner.

October 14, 2019

• ​​​"Transverse-mode coupling effects in scanning cavity microscopy"  by J. Benedikter, T. Moosmayer, M. Mader, T. Hümmer, D. Hunger.

October 11, 2019

• ​​"Microscale Crystalline Rare-Earth Doped Resonators for Strain-Coupled Optomechanics"  by J-F. Motte, N. Galland, J. Debray, A. Ferrier, P. Goldner, N. Lučić, S. Zhang, B. Fang, Y. Le Coq and S. Seidelin.

October 03, 2019

• ​"Coherent optical and spin spectroscopy in nanoscale Pr3+:Y2O3"  by D. Serrano, C. Deshmukh, S. Liu, A. Tallaire, A. Ferrier, H. de Riedmatten and P. Goldner.

September 16, 2019

• ​NanOQTech members met in Barcelona, last Friday, September 13 during the industrial workshop organized by Keysight Technologies. The journey consisted in several talks, a round table discussion about future of quantum technologies and a demo station.

September 15, 2019

• ​"Theory of Subradiant States of a One-Dimensional Two-Level Atom Chain"  by Y.-X. Zhang and K. Moelmer.

August 08, 2019

• ​CNRS researchers (France) visit Aarhus University (Denmark) in order to finalize the work corresponding to the last deliverables (in particular, work on resonators, and how to use them for creating non-classical states, or as force sensors).

In the picture, from left to right: Signe Seidelin (CNRS-IN), Yuxiang Zhang (AU), Kamanasish Debnath (AU), Yann Le Coq (CNRS-SY) and Klaus 

June 10, 2019

• ​NanOQTech's industrial partner, Keysight Technologies, organizes an Industrial Workshop on Quantum Technologies. The event will take place in Barcelona (Spain) on September 13. It will gather industrials and academics for talks and discussions. 

July 24, 2019

• "Rapid cooling of a strain-coupled oscillator by an optical phase-shift"measurement"  by S. Seidelin, Y. Le Coq and K. Moelmer.

June 30, 2019

• NanOQTech members reunited in Paris on July 1-2 2019 for the annual consortium meeting. The progress of the project towards the different objectives was thouroughtfully discussed. The exchanges where as usual, very fruitful and encouraging.

June 27, 2019

• Marion Scarafagio, third year PhD student at CNRS-CP, has been awarded best oral presentation of his session at the EuroCVD 22-Baltic ALD 16 conference. She presented a talk entitled: "Eu or Er doped Y2O3 thin films grown with ALD with optimized properties for quantum technologies". EuroCVD 22-Baltic ALD 16 took place in Luxembourg on 24-28 June 2019 gathering experts on thin film technologies.

May 22, 2019

• CNRS researchers (from CNRS IN and CNRS SY) visit the Barcelona laboratories in order to discuss the final part of the EU project, give scientific talks, as well as visiting the laboratories.

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In the picture: 

Hugues de Riedmatten provides a tour of his labs. From left to right: Chetan Deshmukh, Hugues de Riedmatten, Signe Seidelin, Yann Le Coq and Bernado Casabone.

May 22, 2019

In the picture:

Klaas-Jan Tielrooij (left) introduces the speakers Yann Le Coq (middle) and Signe Seidelin (right) for their talks at the Catalan Institute of Nanoscience and Nanotechnology (ICN2).

• "Surface Plasmon Launching by Polariton Superradiance"  by Y-X. Zhang, Y. Zhang and K. Moelmer.

May 03, 2019

• "Ultrathin Eu- and Er-Doped Y2O3 Films with Optimized Optical Properties for Quantum Technologies"  by M. Scarafaggio, A. Tallaire, K.J. Tielrooij​, D. Cano, A. Grishin, M-H Chavanne, F. H. L. Koppens, A. Ringuedé, M. Cassir, D. Serrano, P. Goldner and A. Ferrier.

April 03, 2019

• New micro-resonator recently fabricated at Nanofab at the NEEL institute (CNRS-IN) with the assistance of Jean-François Motte and Jérôme Debray, starting from bulk crystals grown at CNRS-CP. The current structure is currently being prepared for measurements at SYRTE/Observatoire de Paris (CNRS-SY), see photo (by Bess Fang and Signe Seidelin, in the ctop cleanroom). The sample is developed for testing spectral hole burning in FIB etched structures with variable thickness.

March 19, 2019

• As a part of the CNRS event: "National day of scientific training in chemistry", a group of nine secondary school teachers participated in scientific workshops organized by Diana Serrano (CNRS-CP) and supervised by NanOQTech's junior researchers. Among others, they took part in the chemical synthesis of rare-earth doped nanoparticles and participated in several optical spectroscopy experiments. NanOQTech's context and goals were also discussed during the visit. In the picture: Alexandre Fossati showing the Europium luminescence from just synthesized nanoparticles.

March 04, 2019

NanOQTech innovations tagged by the European Commission innovation radar:

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• Significant improvement of laser stability (CNRS)

• High-precision vibration resistant stage for cryogenic applications (KIT)

January 06, 2019

• "Monte-Carlo simulations of superradiant lasing"  by Y. Zhang, YX. Zhang, K. Moelmer.

December 21, 2018

• Alexandre Fossati (CNRS-CP) has been awarded with the "best oral presentation" at the Paris graduate school yearly meeting, where he presented his PhD thesis work on rare-earth doped nanoparticles synthesis and coherent spectroscopy. Marion Scarafagio (CNRS-CP) also presented her PhD work in a talk entitled: "Elaboration by ALD of europium doped yttrium oxide films for quantum technologies". In the picture: Alexandre Fossati during the poster session.

December 19, 2018

• Yann Le Coq (CNRS/LNE-Syrte) and Signe Seidelin (CNRS/NEEL/UGA) are currently visiting Klaus Mølmer and Yu-Xiang Zhang at Aarhus University. The goal is to progress on the theory for the work-package 3 of the NanOQTech project, in particular how to cool a nano-resonator, and use it as a force-sensor. From left to right: Yann Le Coq, Yu-Xiang Zhang, Signe Seidelin and Klaus Mølmer. 

November 11, 2018

• "Controlled size reduction of rare earth doped nanoparticles for optical quantum technologies"  by S. Liu, D. Serrano, A. Fossati, A. Tallaire, A. Ferrier and P. Goldner.

October 23, 2018

• The 13th edition of the "Rare-earth ions workshop" was hold in Geneva between October 24 and October 26.  Most NanOQTech's partners were represented in the workshop, with talks were given by Signe Seidelin (CNRS-IN), David Hunger (KIT), Shuping Liu (CNRS-CP), Philippe Goldner (CNRS-CP), Bernardo Casabone (ICFO-QP) and Chungyan Shi (ULUND).

October 11, 2018

• As every year, the Chimie ParisTech Science Fair opened its doors, this time on October 13-14, 2018. As in the two previous editions, the IRCP NanOQTech team presented an outreach stand with live experiments where the visitors could see optical materials and effects like light guiding by a water jet (as in telecom optical fibers), or the difference between fluorescence and scatteringphenomena. People of all ages attended the event. This is a great occasion for the youngest  to approach science while having fun.

October 10, 2018

• Diana Serrano (CNRS-CP) presented NanOQTech's goals and early results at the EU project dissemination session at the European Optical Society Biennial Meeting (EOSAM), held in Delft on October 8-12, 2018.

October 03, 2019

• A new consortium meeting was held on Paris, on October 4-5 2018. This was a new occasion for the NanOQTech partners to meet and discuss the latest results. It was also the opportunity for recently recruited members to meet the different partners. Among them Kelvin Chung (KIT) and Mario Persechino (CNRS-CP), the last to join the project as postdocs.

October 02, 2018

• "Multistate and multihypothesis discrimination with open quantum systems" by Alexander Holm Kiilerich and Klaus Mølmer.

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• "Dicke phase transition in a disordered emitter–graphene-plasmon system" by Yu-Xiang Zhang, Yuan Zhang, and Klaus Mølmer.

September 27, 2018

• Chetan Deshmukh, PhD student at ICFO-QP spent two weeks in Paris at CNRS-CP, performing low temperature spectroscopy experiments on ceramics and rare-earth doped nanoparticles. This is the second visit of the young researcher to Paris since the beginning of the project.

September 05, 2018

• "Cavity-enhanced spectroscopy of a few-ion ensemble in Eu3+:Y2O3" by B. Casabone, J. Benedikter, T. Hümmer, F. Oehl, K. de Oliveira Lima, T. W. Hansch, A. Ferrier, P. Goldner, H. de Riedmatten and D. Hunger. Congratulations!

July 26, 2018

• The NanOQTech project and its latest result just published in Nature Communications were discussed in a double interview to Philippe Goldner and Diana Serrano.

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Read the interview here.

May 29, 2018

• "All-optical control of long-lived nuclear spins in rare-earth doped nanoparticles"  by D. Serrano, J. Karlsson, A. Fossati, A. Ferrier and P. Goldner.

This article appears featured at the CNRS National Chemistry Intitute website (link in french)

March 15, 2018

• Pr. Hugues de Riedmatten, group leader at ICFO-QP and working on NanOQTech's WPs 1 and 2 has much to celebrate! He has been awarded the "Premi Ciutat de Barcelona 2017 in Experimental Sciences and Technology" as well as the 2nd prize "Vanguardia de la Ciencia" (Science avant-garde). Congratulations! 

January 29, 2018

• The research article "Recent Advances in Rare Earth Doped Inorganic Crystalline Materials for Quantum Information Processing" by N. Kunkel and P. Goldner (Z. Anorg. Allg. Chem. 2/2018) appears featured at the cover page of the journal. Congratulations!

December 10, 2017

• Chetan Deshmukh (ICFO-QP) joined the Paris team during two weeks. A series of photon echo and spectral hole burning experiments on Y2O3 ceramics were carried out yielding promising results.

November 13, 2017

• IBM researcher Edwin Pednault was doing the dishes one evening when he came to the realization that qubits are a lot like the bristles of a scrubbing brush. What he dubbed as a “seemingly inconsequential moment” became the basis of a fault-tolerance theory which makes the 50-qubit quantum computer possible.

October 13, 2017

• CNRS-CP researchers participated in the 2017 Science Fair, held at Chimie ParisTech on October 14-15. The fair consists on scientific demonstrations for general public. The luminiscent properties of rare-earth materials were outlined in the demonstrations.

October 08, 2017

• Meeting at the NEEL institute (CNRS-IN) with research engineer Jean-François Motte who is expert in the Focused Ion Beam (FIB) techniques used for fabricating the YSO resonators for WP3. Current samples and improvements for future samples were discussed. On the photo, from left to right: Yann Le Coq (CNRS-SY), Signe Seidelin (CNRS-IN), Jean-François Motte and Gwénaëlle Julie (NEEL Nanofab).

September 26, 2017

• David Hunger (KIT) organized a rare-earth ion devoted workshop on September 27,28 2017. The workshop counted with the presence of the most prominent scientific personanlities in the field on rare-earth based quantum technologies. All NanOQTech partners were represented.

September 20, 2017

• NanOQTech fellows Marion Scarafagio and Alexandre Fossati presented their research work at the National Days of Crystals for Optics (JNCO'17), organized by the CMDO-CNRS network from September 4th to 6th. This meeting gathers specialists in crystal growth, spectroscopy, nanostructures and devices for optics.

September 14, 2017

• Daniel Cano (ICFO) visited Aarhus's colleagues on July 10-12. The exchange was very productive with discussions focussing on ways to inject excitations into the graphene plasmons. In the picture, Yuxiang Zhang (blackboard), Daniel Cano and  Yuan Zhang (left).

September 05, 2017

• Philippe Goldner presented a plenary lecture at the International Conference on Luminescence (ICL 2017) which took place in João Pessoa, Brazil, from August 27th to September 1st 2017. The talk entitled "Rare Earth Doped Nanostructures: Quantum Leaps for Optical Technologies'' gave an overview of the developments on rare earth based nanoscale systems for optical quantum technologies.

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June 22, 2017

• "Dispersive heterodyne probing method for laser frequency stabilization based on spectral hole burning in rare-earth doped crystals" by O. Gobron, K. Jung, N. Galland, K. Predehl, R. Le Targat, A. Ferrier, P. Goldner, S. Seidelin, and Y. Le Coq

June 15, 2017

• If certain feasible technological improvements are achieved, emerging quantum processors have a good chance to become commercially valuable within very few years.

May 02, 2017

• Klaus Moelmer performed a succesful public conference in which he explained the principles of the quantum computer in front of a broad audience. Definively, the topic creates a lot of interest and expectation as the amphitheater was full (more than 300 registrations) and the public had a lot of questions for Klaus after the talk.

May 01, 2017

• NanOQTech's mini-summer school took place at Ecole Nationale Supérieure de Chimie de Paris on May, 2-4.

March 26, 2017

• Quantum computers could crack problems that are impossible for conventional computers. But first researchers have to build one that's big enough to be useful. This animation looks at the challenges and rewards of creating a quantum computer.

March 05, 2017

• Klaus Mølmer hosted a series of theory discussions concerning work-package 3 at Aarhus University. Yann Le Coq (LNE SYRTE - Paris), Signe Seidelin (Institut NEEL) and AU NanOQTech postdoc Yuxiang Zhang were present, and participated in the discussions. Laboratory visits (optomechanics, trapped-ion and cold atom experiments) also took place.

February 08, 2017

• "Nuclear spin coherence properties of 151Eu3+ and 153Eu3+ in a Y2O3 transparent ceramic", by J. Karlsson, N. Kunkel, A. Ikesue, A. Ferrier and P. Goldner " appears highlighted in Journal of Physics News and Views

February 07, 2017

• "Nuclear spin coherence properties of 151Eu3+ and 153Eu3+ in a Y2O3 transparent ceramic", by J. Karlsson, N. Kunkel, A. Ikesue, A. Ferrier and P. Goldner

January 17, 2017

• "Optical Line Width Broadening Mechanisms at the 10 kHz Level in Eu3+:Y2O3 Nanoparticles", by J. G. Bartholomew, K. de Oliveira Lima, A. Ferrier and P. Goldner.

January 07, 2017

• Philippe Goldner (CNRS-CP), Stefan Kröll (LU), David Hunger (KIT) and Yann Lecoq (CNRS-SY) attended the Colloquium on the Physics of Quantum Electronics 2017, held in Snowbird, Utah (USA) on January 8-13.

November 21, 2016

• A poster entitled 'Towards bulk crystal coherence times in Eu3+ :Y2O3 nanocrystals' was presented by Jenny Karlsson (CNRS-CP) during the 7th IQFA's Colloquium in Paris on quantum information processing. The Colloquium took place at Telecom ParisTech from November 16 to 18, 2016.  

November 29, 2016

• The last November 30th took place the "The BIG Bell Test (BBT)", a worldwide project to bring human unpredictability (randomness) to a real physics experiment. If you did not participate in the real Bell Test, last November 30, 2016, you can always check your quantum randomness skills playing "The Big Bell Quest" game.

December 07, 2016

• Philippe Goldner and Jenny Karlsson (CNRS-CP) visited David Hunger’s group (KIT) at LMU in Munich, where the KIT's partner experimental work is still taking place before moving to Karlsruhe. After P. Goldner’s seminar on Stark echo modulation memories in rare earth crystals, discussions focused on WP1 work and especially on europium doped nanoparticles coupled to optical fiber micro-cavities. The main outcome was the characteristics of the new samples to be produced by CNRS-CP and the design of future experiments with cavities. The visit finished with a lab tour where the cavity fabrication and the low temperature cavity experiments were thoroughly explained. 

December 14, 2016

• NanOQTech Ph.D. student Nicolas Galland mounting a new ultrastable cavity for WP3 related experiments.

November 01, 2016

• The research article "Dispersive coupling between light and a rare-earth-ion–doped mechanical resonator", by NanoQTech partners Klaus Mølmer, Yann Le Coq, and Signe Seidelin is online

December 21, 2016

• Signe Seidelin (Institut NEEL) visited Klaus Mølmer's group at Aarhus University. Klaus Mølmer is leading the theoretical efforts in the NanOQTech project, and the goal of the discussions was to plan the next steps of the NEEL and SYRTE experiments (part of WP3) based on theoretical considerations, and vice versa. A theory work-program taking into consideration the experimental challenges - identified over the last few months-  was outlined, and the best strategy to overcome these challenges identified.

January 18, 2017

• Jenny Karlsson presented a seminar entitled "Coherence properties of rare earth doped nanoparticles - Towards smarter materials for quantum technologies". It presents results on coherent spectroscopy of rare earth doped nanoparticles as well as background information on quantum information and coherence aimed at a non specialised audience

January 29, 2017

• The research results in "Optical Line Width Broadening Mechanisms at the 10 kHz Level in Eu3+:Y2O3 Nanoparticles" by J. Bartholomew et al., highlighted at the CNRS Chemistry Institute website.

October 20, 2016

• NanOQTech kick-off meeting was held on October 19 & 20, 2016 at Chimie ParisTech (Paris, France). It gathered all partners for about one day and a half to discuss recent scientific developments and the planning and coordination of the project.

October 16, 2016

• A poster presented NanOQTech at the 2016 National Science Fair event that took place at Chimie ParisTech on October 15 and 16, 2016. It describes the H2020 NanOQTech project for a general (French) audience.