| 2020/06: | D. Bakalov (INRNE, Sofia) and his team present, with our contribution, the accurate theory of the hyperfine structure of the deuterium molecular ion |
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| 2020/05: | We succeeded in performing the most precise determination of the proton-electron mass ratio by spectroscopy of HD+ |
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| 2020/04: | E. Wiens presents the complete characterization of a compact, vibration-insensitive silicon resonator operated at 3 K |
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| 2019/05: | Interview with Prof. Schiller about the ERC project "PREMOL" |
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| 2018/12: | Within an international collaboration we performed one of the most precise measurements of a property of nature, to seventeen digits accuracy |
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| 2018/12: | M.Sc. student René Oswald and A. Nevsky demonstrate an exceptionally high long-term frequency stability of spectral holes of ions in a cryogenic crystal |
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| 2018/05: | Prof. Schiller is awarded an Advanced Grant of the European Research Council (2.5 M€) for a project on precision spectroscopy of molecular hydrogen ions. |
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| 2018/03: | Vladimir Dzuba, Victor Flambaum and S. Schiller propose the use of novel metastable states of ytterbium for applications in fundamental physics |
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| 2017/09: | Ph.D. students Soroosh Alighanbari and Michael Hansen demonstrate for the first time molecular ion spectroscopy in the Lamb-Dicke regime |
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| 2017/06: | Our Michelson-Morley experiment of 2009 is featured in Johann Rafelski new book "Relativity Matters" (Springer, 2017) |
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| 2017/04: | In a cooperation between our group and the group of Prof. F. Gianturco (U. Innsbruck), we propose quantum state preparation of molecular hydrogen ions via buffer gas cooling |
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| 2017/02: | Ph.D. students S. Origlia (ITN FACT) and Pramod M. achieve an atomic clock with 2 x 10-17 instability, in cooperation with the SOC2 partners |
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| 2017/01: | Using a crystal at 1.5 Kelvin, Ph.D. student E. Wiens, Dr. Nevsky, and Prof. Schiller test whether the expansion of the universe has observable consequences on the measured length of rods |
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| 2016/04: | Stefano Origlia won a Best Student Paper Award for his presentation on the results of the SOC2 apparatus at the SPIE conference in Brussels |
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| 2016/01: | Ph.D. student E. Magoulakis and post-doc Q. Chen realize the most sensitive Michelson-Morley laser experiment so far |
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| 2015/12: | Ph.D. student Stefano Origlia (ITN FACT) and colleagues from Univ. Birminham and PTB Braunschweig observe the clock transition in the transportable SOC optical lattice clock |
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| 2015/08: | Prof. Schiller is awarded the Reinhard-Heynen- and Emmi-Heynen-Prize of the Association of Friends and Supporters of the Heinrich-Heine-Universität for his research |
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| 2015/05: | As part of his Ph.D. dissertation research, M. Hansen demonstrates the first frequency stabilization of a QCL to an ultra-stable resonator, resulting in 60 Hz linewidth |
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| 2015/05: | Precision on the road: two transportable optical atomic clock apparata have been moved by van from university laboratories (HHU, Univ. of Birmingham) to national metrology institutes (INRIM, PTB) - and are again fully functional |
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| 2014/10: | First Ph.D. training school of the "Cold Molecular Ions at the Quantum Limit" EU-ITN held in Düsseldorf with 32 participants |
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| 2014/07: | Article by Prof. Schiller, Bakalov and Korobov selected as an "editors suggestion" |
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| 2014/02: | Prof. Schiller, D. Bakalov (Sofia) and V. Korobov (Dubna) show theoretically that the transition frequencies of molecular hydrogen ions can be measured with exquisite precision |
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| 2014/01: | Profs. Schiller, Tuckey and Rasel present the design of the mission STE-QUEST to ESA |
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| 2013/11: | An ultrastable crystalline optical cavity: Ph.D. student E. Wiens demonstrates a silicon optical reference resonator at 1.6 K |
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| 2013/10: | Project "Space optical clocks": A. Nevsky and master student S. Alighanbari develop compact subunit for an optical clock |
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| 2013/09: | Ph.D. student M. Hansen demonstrates novel approach for measuring optical frequencies in the mid-IR spectral range |
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| 2013/081: | D. Bakalov (Sofia) and Prof. Schiller determine theoretically an important systematic effect in the spectroscopy of HD+ |
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| 2013/07: | Shake it! VIDEO CLIP of Q.-F.Chen, M. Cardace and A. Nevsky demonstrating a robust reference cavity model for future space applications |
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| 2013/03: | Ultracool at 1.3 Kelvin: Ph.D. student Heiko Luckmann puts into operation a new pulse tube cryostat suitable for precision experiments |
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| 2013/03: | Analysis of the potential of existing underground optical fiber networks for implementing gyroscopes for geophysics applications |
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| 2013/02: | With passion from Florence: master student Soroosh Alighanbari and post-doc Qun-Feng Chen integrate a frequency stabilization system into the transportable optical clock at the Università di Firenze |
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| 2012/09: | Observation of the clock transition of ultracold Yb atoms in an optical lattice, with an all-diode-laser apparatus (with Prof. A. Görlitz) |
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| 2012/05: | First year of the EU-FP7 Project "Space Optical Clocks 2" is successfully completed |
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| 2012/01: | First demonstration of rotational excitation of a sympathetically cooled molecular ion species |
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| 2011/12: | Ultrastable lock of lasers to high-finesse optical cavities: 2 x 10-17 achieved |
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| 2011/11: | First optical measurement of the hyperfine spectrum of the HD+ molecular ion and demonstration of quantum state addressing in sympathetically cooled molecular ions |
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| 2011/09: | A novel continuous-wave laser system for spectroscopy at 5.1 µm and optical frequency measurements is successfully applied to molecular spectroscopy |
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| 2011/07: | Sympathetically cooled polyatomic molecular ions: first demonstration of vibrational spectroscopy |
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| 2011/07: | Whispering gallery resonators are predicted to exhibit ultralow thermal noise at cryogenic temperature and could be of interest for frequency stabilization of lasers |
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| 2011/06: | High resolution spectroscopy of long-lived spectral holes in a cryogenic crystal: determination of a very low frequency drift |
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| 2011/03: | A novel fiber laser system emitting in the UV greatly simplifies laser cooling of Beryllium ions |
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| 2011/02: | ESA selects "STE-QUEST" as one of four medium-size candidate missions for a flight in 2022+
media response: HHU-Düsseldorf |
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| 2010/12: | Contribution to the proposal "STE-QUEST" for an ESA satellite mission to test General Relativity |
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| 2010/10: | A transportable ultrastable laser developed by PTB is compared in our laboratory to our own ultrastable laser via a frequency comb virtual beat |
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| 2010/07: | Theory of the Zeeman effect in the HD+ molecular ion |
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| 2009/12: | Achievement of all-optical state preparation of molecular ions in the rovibrational ground state |
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| 2009/08: | A laser test of the isotropy of light propagation at the 2x10-17level
media response: physicsworld , pro-physik , lenta.ru |
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| 2008/11: | Chapter on “Sympathetically cooled molecular ions†to appear in the book “Cold Molecules†|
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| 2008/10: | Demonstration of continuous-wave THz sources with Hz-level linewidth |
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| 2008/10: | First demonstration of sympathetic translational cooling of proteins in an ion trap |
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| 2008/06: | Observation of the clock transition in cold neutral Ytterbium |
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| 2008/04: | A narrow-linewidth single-frequency yellow source based on a diode laser is demonstrated |
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| 2007/07: | International team including Düsseldorf researchers proposes an optical clock satellite mission in ESA's Cosmic Vision program |
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| 2007/06: | Düsseldorf frequency comb allows first precise measurement of the stability of a cryogenic optical resonator |
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| 2007/04: | Grating-enhanced external cavity diode laser with 30 kHz free-running linewidth, allows high-fidelity phase lock to reference frequency |
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| 2007/03: | A workshop on an optical clock mission in ESA's Cosmic Vision program (Düsseldorf, March 8-9, 2007). |
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| 2007/02: | Most precise measurment of a transition frequency in a molecular ion: vibrational spectroscopy of cold HD+ ions. |
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| 2006/06: | First ro-vibrational spectroscopy on cold trapped molecular ions below 0.1 K. |
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| 2006/06: | First translational cooling of complex molecular ions to below 1 K |
