QuantumFrontiers Newsletter #11 (Apr 2022)

Science builds bridges: QuantumFrontiers and Quantum Alliance at the world’s largest physics meeting
The first hybrid March Meeting of the American Physical Society (APS) started on March 14th in Chicago and online. As the largest physics meeting in 2022, APS March Meeting brought together 12.000 physicists from all around the globe for scientific exchange on fundamental research. QuantumFrontiers and  the Quantum Alliance presented at the booth “Research in Germany” specific opportunities for doing research in Germany on quantum science and technologies.

Research cooperation in war
What started as cooperation for better radar measurement technology is now in the midth of a brutal war. In December, QuantumFrontiers professor Vadim Issakov began a joint research collaboration with the Igor Sikorky Kyiv Polytechnic Institute in Kiev. Even now, after the Russian invasion of Ukraine, both partners are still eager to work together. Even if it is now about hosting refugee students at the TU Braunschweig.

Transfer on an international scale
QuantumFrontiers joins QVLS at the Mobile World Congress (MWC) in Barcelona. The Quantum Valley Lower Saxony (QVLS) is accelerating the impact of our research at the quantum frontiers at the MWC 2022 in Barcelona. As part of the European Quantum Flagship QVLS is connecting our regional strength in quantum computing, metrology and sensing with attendees from 180 countries. The MWC is famous as a place of groundbreaking tech revelations. As a cluster of excellence we are proud to be part of the process of transferring our research results to practical applications.

What who should know about quantum: A guide to the quantum world
Quantum computers, quantum dot displays and a quantum of comfort: little by little, terms and technologies from quantum physics are trickling into everyday life. Those who want to know more often read sentences like “Quanta contradict our thinking” or the quote from Nobel Prize winner Richard Feynmann: “I think it’s safe to say that nobody understands quantum mechanics.” So is there little hope for anyone without a PhD in physics? Rainer Müller, Professor of Physics Didactics at TU Braunschweig, is convinced of the opposite – too.

General Assembly, May 3rd, 2022 at 16:00
The General Assembly is taking place as a WebEx Online Meeting. It is responsible for receiving the report of the authorized representative speaker and co-speakers and the election and deselection of members of the bodies of the cluster. To achieve a quorum, a sufficient number of members must attend. Please use this link to attend. QuantumFrontiers-Day 2022, June 24th
The QuantumFrontiers Day is devoted to the science within the cluster and the internal and external networking and exchange. It takes place at the Maritim Airport Hotel Hannover. Please find the programm in seafile. You need to register here.

All-optical matter-wave lens using time-averaged potentials
The generation of ultracold atomic ensembles with high repetition rates is a key technique for matter-wave sensors. A team of scientists around Henning Albers has now presented a new approach. They use dynamic time-averaged optical potentials to speed up the generation of large ultracold atomic ensembles and to study the feasibility of an all-optical matter-wave lens by rapid decompression of the trap. Do you have a research highlight you'd like to add to the QF Website and announce in the Newsletter? Please contact office@quantumfrontiers.uni-hannover.de. 

Silke Ospelkaus-Schwarzer receives ERC Consolidator Grant
Prof. Silke Ospelkaus-Schwarzer is receiving funding of up to 2 million euros this year for her TriTraMo research project on complex quantum systems at ultracold temperatures.

Albers H, Corgier R, Herbst A, Rajagopalan A, Schubert C, Vogt C, Woltmann M, Lämmerzahl C, Herrmann S, Charron E, Ertmer W, Rasel EM, Gaaloul N and Schlippert D (2022), "All-optical matter-wave lens using time-averaged potentials", Communications Physics., Mar, 2022. Vol. 5(1) Springer Science and Business Media LLC. Ardila LAP (2022), "Ultra-Dilute Gas of Polarons in a Bose–Einstein Condensate", Atoms., Mar, 2022. Vol. 10(1), pp. 29. MDPI AG. Babushkin I, Demircan A, Kues M and Morgner U (2022), "Wave-Shape-Tolerant Photonic Quantum Gates", Physical Review Letters., Mar, 2022. Vol. 128(9) American Physical Society (APS). Belenchia A, Carlesso M, Bayraktar Ö, Dequal D, Derkach I, Gasbarri G, Herr W, Li YL, Rademacher M, Sidhu J, Oi DK, Seidel ST, Kaltenbaek R, Marquardt C, Ulbricht H, Usenko VC, Wörner L, Xuereb A, Paternostro M and Bassi A (2022), "Quantum physics in space", Physics Reports., Mar, 2022. Vol. 951, pp. 1–70. Elsevier BV. Budker D, Berengut JC, Flambaum VV, Gorchtein M, Jin J, Karbstein F, Krasny MW, Litvinov YA, Pálffy A, Pascalutsa V, Petrenko A, Surzhykov A, Thirolf PG, Vanderhaeghen M, Weidenmüller HA and Zelevinsky V (2022), "Expanding Nuclear Physics Horizons with the Gamma Factory", Annalen der Physik., Jan, 2022. Vol. 534(3), pp. 2100284. Wiley. Decker KSC, Karrasch C, Eisert J and Kennes DM (2020), "Floquet Engineering Topological Many-Body Localized Systems", Physical Review Letters., May, 2020. Vol. 124(19) American Physical Society (APS). Decker KSC, Kennes DM, Eisert J and Karrasch C (2020), "Entanglement and spectra in topological many-body localized phases", Physical Review B., Jan, 2020. Vol. 101(1) American Physical Society (APS). Frombach D and Recher P (2022), "Tunable effective length of fractional Josephson junctions", Journal of Physics: Condensed Matter., Feb, 2022. Vol. 34(16), pp. 164005. IOP Publishing. Heinze J, Willke B and Vahlbruch H (2022), "Observation of Squeezed States of Light in Higher-Order Hermite-Gaussian Modes with a Quantum Noise Reduction of up to 10 dB", Physical Review Letters., Feb, 2022. Vol. 128(8) American Physical Society (APS). Hirt F, Christinck J, Hofer H, Rodiek B and Kück S (2021), "Sample fabrication and metrological characterization of single-photon emitters based on nitrogen vacancy centers in nanodiamonds", Engineering Research Express., Dec, 2021. Vol. 3(4), pp. 045038. IOP Publishing. Hochheim S, Brockmuller E, Wessels P, Koponen J, Lowder T, Novotny S, Willke B, Neumann J and Kracht D (2022), "Single-Frequency 336 W Spliceless All-Fiber Amplifier Based on a Chirally-Coupled-Core Fiber for the Next Generation of Gravitational Wave Detectors", Journal of Lightwave Technology., Apr, 2022. Vol. 40(7), pp. 2136–2143. Institute of Electrical and Electronics Engineers (IEEE). Käseberg T, Grundmann J, Siefke T, Klapetek P, Valtr M, Kroker S and Bodermann B (2022), "Mueller Matrix Ellipsometric Approach on the Imaging of Sub-Wavelength Nanostructures", Frontiers in Physics., Jan, 2022. Vol. 9 Frontiers Media SA. Käseberg T, Grundmann J, Siefke T, Kroker S and Bodermann B (2022), "Abbildende Müller-Matrix-Ellipsometrie für die Charakterisierung vereinzelter Nanostrukturen", tm - Technisches Messen., Mar, 2022. Vol. 0(0) Walter de Gruyter GmbH. Kück S, López M, Hofer H, Georgieva H, Christinck J, Rodiek B, Porrovecchio G, Šmid M, Götzinger S, Becher C and et al. (2022), "Single photon sources for quantum radiometry: a brief review about the current state-of-the-art", Applied Physics B., Jan, 2022. Vol. 128(2) Springer Science and Business Media LLC. Manglano Clavero I, Margenfeld C, Quatuor J, Spende H, Peters L, Schwarz UT and Waag A (2022), "Gradients in Three-Dimensional Core–Shell GaN/InGaN Structures: Optimization and Physical Limitations", ACS Applied Materials & Interfaces., February, 2022. Meylahn F and Willke B (2022), "Characterization of Laser Systems at 1550 nm Wavelength for Future Gravitational Wave Detectors", Instruments., Mar, 2022. Vol. 6(1), pp. 15. MDPI AG. Peibst R, Rienäcker M, Larionova Y, Folchert N, Haase F, Hollemann C, Wolter S, Krügener J, Bayerl P, Bayer J and et al. (2022), "Towards 28 %-efficient Si single-junction solar cells with better passivating POLO junctions and photonic crystals", Solar Energy Materials and Solar Cells., May, 2022. Vol. 238, pp. 111560. Elsevier BV. Pelzer L, Dietze K, Kramer J, Dawel F, Krinner L, Spethmann N, Martinez V, Aharon N, Retzker A, Hammerer K and Schmidt P (2021), "Tailored optical clock transition in ⁴⁰Ca⁺", Measurement: Sensors., Dec, 2021. Vol. 18, pp. 100326. Elsevier BV. Piest B, Vollenkemper V, Böhm J, Herbst A and Rasel EM (2022), "Red- and blue-detuned magneto-optical trapping with liquid crystal variable retarders", Review of Scientific Instruments., Feb, 2022. Vol. 93(2), pp. 023202. AIP Publishing. Pistorius T and Weimer H (2021), "Variational analysis of driven-dissipative bosonic fields", Physical Review A., Dec, 2021. Vol. 104(6) American Physical Society (APS). Richter J, Maiorova AV, Viatkina AV, Budker D and Surzhykov A (2022), "Parity‐Violation Studies with Partially Stripped Ions", Annalen der Physik., Feb, 2022. , pp. 2100561. Wiley. Shelling Neto L, Dickmann J and Kroker S (2022), "Deep learning assisted design of high reflectivity metamirrors", Optics Express., Jan, 2022. Vol. 30(2), pp. 986. The Optical Society. Spende H, Margenfeld C and Waag A (2022), "AlGaN Microfins as Nonpolar UV Emitters Probed by Time-Resolved Cathodoluminescence", ACS Photonics., Apr, 2022. American Chemical Society (ACS). 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Volotka A, Samoilenko D, Fritzsche S, Serbo VG and Surzhykov A (2022), "Polarization of Photons Scattered by Ultra-Relativistic Ion Beams", ANNALEN DER PHYSIK., Feb, 2022. Yamamoto K, Vorndamme C, Hartwig O, Staab M, Schwarze TS and Heinzel G (2022), "Experimental verification of intersatellite clock synchronization at LISA performance levels", Physical Review D., Feb, 2022. Vol. 105(4) American Physical Society (APS). Yang J, Fandrich T, Benthin F, Keil R, Sharma NL, Nie W, Hopfmann C, Schmidt OG, Zopf M and Ding F (2022), "Photoneutralization of charges in GaAs quantum dot based entangled photon emitters", Physical Review B., Mar, 2022. Vol. 105(11) American Physical Society (APS). Yang Y, Yamamoto K, Dovale Álvarez M, Wei D, Esteban Delgado JJ, Müller V, Jia J and Heinzel G (2022), "On-Axis Optical Bench for Laser Ranging Instruments in Future Gravity Missions", Sensors., Mar, 2022. Vol. 22(5), pp. 2070. MDPI AG. Zhang M, Müller J, Biskupek L and Singh VV (2022), "Characteristics of differential lunar laser ranging", Astronomy & Astrophysics., Mar, 2022. Vol. 659, pp. A148. EDP Sciences.

Internal: New round of Flexible Fund proposals
The new deadlines for Flexible Funds proposals are:
Proposals > 50.000€: Tuesday, 16.08.2022
Proposals < 50.000€: Tuesday, 23.08.2022  IMPORTANT: Please remember that a Flexible Fund proposal must be assigned to a Research Unit or a Topical Group for submission. The respective Unit/Group leader will act as rapporteur in case the proposal amounts to more than 50k€. If your proposals affect several Units/Groups, please choose your primary one. Refer to our wiki for guidelines and templates.

European Frequency and Time Forum & the International Frequency Control Symposium (EFTF/IFCS)
24-28 Apr 2022, Paris (France) Laser World of Photonics / World of Quantum
26-29 Apr 2022 Munich (Germany) 766. WE-Heraeus-Seminar: High‐Precision Measurements and Searches for New Physics
09-13 May 2022, Bad Honnef (Germany) LEAPS meets Quantum Technology
16-22 May 2022 Elba (Italy) Quantum 2.0, Conference and Exhibition
13-16 Jun 2022, Boston (USA) PhoenixD Laser Day 2022
15 Jun 2022, Hannover (Germany) Early Career Conference in Trapped Ions (ECCTI)
26 Jun-01 Jul 2022, CERN, Geneva (Switzerland) European Conference on Atoms Molecules and Photons (ECAMP14)
27 Jun-01 Jul 2022, Vilnius (Lithuania) International Conference on Quantum Communication, Measurement and Computing (QCMC 2022)
11-15 Jul 2022, Lisbon (Portugal) 27th International Conference on Atomic Physics (ICAP)
17-22 Jul 2022, Toronto (Canada) QMATH Masterclass on Entropy Inequalities in Quantum Information Science
22-26 Aug 2022, Copenhagen (Denmark) Solvay Workshop on Quantum Simulation
NEW DATE 29-31 Aug 2022, Brussels (Belgium) IAMP – EMS Summer School in Mathematical Physics 
29 Aug-02 Sep 2022, Munich (Germany) 20th International Conference on the Physics of Highly Charged Ions
29 Aug-03 Sep 2022, Matsue (Japan) FOMO 2022 Summer School ans Conference
12-16 Sep and 19-23 Sep 2022, Trieste (Italy) 8th International Conference on Trapped Charged Particles and Fundamental Physics
25-30 Sep 2022, Glashütten (Germany) ICIOP 2020/2021 - International Conference on Integrated Quantum Photonics
5-7 Oct 2022, Copenhagen (Denmark)

Science Communication Workshop, May 20, 2022, 9:30-12:30
PhD students and first year post-docs are highly recommended to participate. Anyone else is invited to join when there will be availability. Maximum number of participants is 20. Please register here by May 10th.

At the QUEST Institute, they are looking for a postdoctoral researcher and doctoral candidates for projects on a transportable aluminium ion clock, optical clocks based on highly charged ions, and a multi-ion calcium clock. The Max Planck Institute for Gravitational Physics (Albert Einstein Institute) in Hannover, Germany, is looking for highly motivated experimental physicists for PhD student positions in the Laser and Squeezed Light group.