The GiaSaaS mission to send a Greek satellite into space has just been selected. It will be lead by OHB-Hellas and encompasses a Pan-Greek consortium of companies and universities, including the Libre-Space-Foundation, the National Observatory of Athens, the The Microprocessors Laboratory and Digital Systems Lab of the NTUA, the Greek Center for Security Studies (KEMEA).
Mary Georgousi will start a master on Space Optics with us. Her project will be an ultra-compact, double compensated, highly stable saturation spectroscopy suitable for space projects.
Saurabh was the driving force behind this. He believed that this paper could go far and made sure that these great results get the attention it deserves. The effort paid of — thanks and congratulations to the whole team!
Atomtronic Matter-Wave Lensing
Saurabh Pandey, Hector Mas, Georgios Vasilakis, and Wolf von Klitzing
Phys. Rev. Lett. 126, 170402 (2021)
Published April 28, 2021
Vangelis Tzardis is has been accepted a the PhD in Frederick University in Cyprus to work on the identification and prediction of brain tumors from MR images.
Congratulations from the BEC team!
Good news: Our new ESA project: Greek InfrAstructure for Satellite as a Service: GIASaaS (headed by OHB-Hellas) has been selected for evaluation!
Our article ‘ELGAR—a European Laboratory for Gravitation and Atom-interferometric Research’ has just appeared in Classical and Quantum Gravity:
ELGAR — a European Laboratory for Gravitation and Atom-interferometric Research
B. Canuel, S. Abend, P. Amaro-Seoane, F. Badaracco, Q. Beaufils, A. Bertoldi, K. Bongs, P. Bouyer, C. Braxmaier, W. Chaibi, N. Christensen, F. Fitzek, G. Flouris, N. Gaaloul, S. Gaffet, C. L. G. Alzar, R. Geiger, S. Guellati-Khelifa, K. Hammerer, J. Harms, J. Hinderer, M. Holynski, J. Junca, S. Katsanevas, C. Klempt, C. Kozanitis, M. Krutzik, A. Landragin, I. L. Roche, B. Leykauf, Y.-H. Lien, S. Loriani, S. Merlet, M. Merzougui, M. Nofrarias, P. Papadakos, F. P. dos Santos, A. Peters, D. Plexousakis, M. Prevedelli, E. M. Rasel, Y. Rogister, S. Rosat, A. Roura, D. O. Sabulsky, V. Schkolnik, D. Schlippert, C. Schubert, L. Sidorenkov, J.-N. Siemß, C. F. Sopuerta, F. Sorrentino, C. Struckmann, G. M. Tino, G. Tsagkatakis, A. Vicere, W. von Klitzing, L. Woerner, and X. Zou
Classical and Quantum Gravity 37 225017 (2020)
Decoherence-free radiofrequency dressed subspaces
We study the spectral signatures and coherence properties of radiofrequency dressed hyperfine Zeeman sub-levels of 87Rb. Experimentally, we engineer combinations of static and RF magnetic fields to modify the response of the atomic spin states to environmental magnetic field noise. We demonstrate analytically and experimentally the existence of ‘magic’ dressing conditions where decoherence due to electromagnetic field noise is strongly suppressed. Building upon this result, we propose a bi-chromatic dressing configuration that reduces the global sensitivity of the atomic ground states to low-frequency noise, and enables the simultaneous protection of multiple transitions between the two ground hyperfine manifolds of atomic alkali species. Our methods produce protected transitions between any pair of hyperfine sub-levels at arbitrary (low) DC-magnetic fields.
Now on arXive !n
Our paper on the detection of gravitational waves using ground-based matterwave interferometers has just been accepted by Classical and Quantum Gravity:
Canuel et al 2020 Class. Quantum Grav. https://doi.org/10.1088/1361-6382/aba80e
Gravitational Waves (GWs) were observed for the first time in 2015, one century after Einstein predicted their existence. There is now growing interest to extend the detection bandwidth to low frequency. The scientific potential of multi-frequency GW astronomy is enormous as it would enable to obtain a more complete picture of cosmic events and mechanisms. This is a unique and entirely new opportunity for the future of astronomy, the success of which depends upon the decisions being made on existing and new infrastructures. The prospect of combining observations from the future space-based instrument LISA together with third generation ground based detectors will open the way towards multi-band GW astronomy, but will leave the infrasound (0.1 Hz to 10 Hz) band uncovered. GW detectors based on matter wave interferometry promise to fill such a sensitivity gap. We propose the European Laboratory for Gravitation and Atom-interferometric Research (ELGAR), an underground infrastructure based on the latest progress in atomic physics, to study space-time and gravitation with the primary goal of detecting GWs in the infrasound band. ELGAR will directly inherit from large research facilities now being built in Europe for the study of large scale atom interferometry and will drive new pan-European synergies from top research centers developing quantum sensors. ELGAR will measure GW radiation in the infrasound band with a peak strain sensitivity of 3.3×10-22/√Hz at 1.7 Hz. The antenna will have an impact on diverse fundamental and applied research fields beyond GW astronomy, including gravitation, general relativity, and geology.