Nicolas Spethmann
German National Metrology Institute
21 Papers
63 Citations
Nicolas Spethmann is an academic researcher from German National Metrology Institute. The author has contributed to research in topics: Quantum limit & Ultracold atom. The author has an hindex of 12, co-authored 19 publications. Previous affiliations of Nicolas Spethmann include University of California, Berkeley & University of Bonn.
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Papers
Optically measuring force near the standard quantum limit
Sydney Schreppler,Nicolas Spethmann,Nathan Brahms,Thierry Botter,Maryrose Barrios,Dan Stamper-Kurn,Dan Stamper-Kurn +6 more
TL;DR: An extremely sensitive method for force measurement was developed that applied an external force to the center-of-mass motion of an ultracold atom cloud in a high-finesse optical cavity and measured the resulting motion optically.
209
Towards a transportable aluminium ion quantum logic optical clock
Stephan Hannig,Lennart Pelzer,Nils Scharnhorst,Johannes Kramer,Mariia Stepanova,Z. T. Xu,Nicolas Spethmann,Ian D. Leroux,Tanja E. Mehlstäubler,Piet O. Schmidt +9 more
TL;DR: In this paper, a transportable optical clock based on a single trapped aluminum ion, which is interrogated via quantum logic spectroscopy, is presented, which employs singly charged calcium as the logic ion for sympathetic cooling, state preparation, and readout.
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Complex Squeezing and Force Measurement Beyond the Standard Quantum Limit.
L. F. Buchmann,L. F. Buchmann,Sydney Schreppler,Jonathan Kohler,Nicolas Spethmann,Nicolas Spethmann,Dan Stamper-Kurn,Dan Stamper-Kurn +7 more
TL;DR: In this paper, it was shown that complex squeezing is a component of ponderomotive squeezing of light through cavity optomechanics and proposed a detection scheme called synodyne detection, which reveals complex squeezing and allows the accounting of measurement backaction.
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Towards a Transportable Aluminium Ion Quantum Logic Optical Clock
Stephan Hannig,Lennart Pelzer,Nils Scharnhorst,Johannes Kramer,Mariia Stepanova,Z. T. Xu,Nicolas Spethmann,Ian D. Leroux,Tanja E. Mehlstäubler,Piet O. Schmidt +9 more
TL;DR: In this paper, a transportable optical clock based on a single trapped aluminium ion, which is interrogated via quantum logic spectroscopy, is presented for chronometric levelling with few-cm height resolution.
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Towards European standards for quantum technologies
Oskar van Deventer,Nicolas Spethmann,Myriam Loeffler,Michele Amoretti,Robert van den Brink,Natalia Bruno,Paolo Comi,N. Farrugia,Marco Gramegna,Ben Kassenberg,Wojciech Kozlowski,T. Langer,T D Lindstrom,Vicente Martin,Niels M. P. Neumann,H. Papadopoulos,Saverio Pascazio,Momtchil Peev,Richard Pitwon,Michiel Adriaan Rol,Paolo Traina,Pim Venderbosch,Frank Wilhelm-Mauch +22 more
TL;DR: In this paper , the authors present insights on standardisation for quantum technologies from the perspective of the CEN-CENELEC Focus Group on Quantum Technologies (FGQT), which was established in June 2020 to coordinate and support the development of standards relevant for European industry and research.