Stefan Alaric Schäffer
Postdoc
Quantop
Blegdamsvej 17
2100 København Ø
10-18 optical atomic clock comparisons within the boulder atomic clock network
Nardelli, N. V., Beloy, K., Bodine, M. I., Bothwell, T., Brewer, S., Bromley, S., Clements, E., Deschenes, J. D., Diddams, S. A., Fasano, R., Fortier, T. M., Hassan, Y., Hume, D. H., Kedar, D., Kennedy, C. J., Khader, I., Koepke, A., Leibrandt, D. R., Leopardi, H., Ludlow, A. & 13 others, , 15 May 2020, In: Cleo. F183, STh3G.3.Research output: Contribution to journal › Conference article › Research › peer-review
- Published
AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space
El-Neaj, Y. A., Alpigiani, C., Amairi-Pyka, S., Araujo, H., Balaz, A., Belic, A., Bentine, E., Bernabeu, J., Bingham, R., Bolpasi, V., Bowden, W., Buchmueller, O., Burrage, C., Calmet, X., Canuel, B., Charmandaris, V., Chen, X., Coleman, J., Cotter, J., Cui, Y. & 69 others, , 4 Mar 2020, In: EPJ Quantum Technology. 7, 1, 27 p., 6.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Atomic clock performance enabling geodesy below the centimetre level
McGrew, W. F., Zhang, X., Fasano, R. J., Schäffer, Stefan Alaric, Beloy, K., Nicolodi, D., Brown, R. C., Hinkley, N., Milani, G., Schioppo, M., Yoon, T. H. & Ludlow, A. D., 6 Dec 2018, In: Nature. 564, 7734, p. 87-90Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Cavity-enhanced optical clocks
Schäffer, Stefan Alaric, 2019, Niels Bohr Institute, Faculty of Science, University of Copenhagen.Research output: Book/Report › Ph.D. thesis › Research
- Published
Collectively enhanced Ramsey readout by cavity sub- to superradiant transition
Bohr, Eliot, Kristensen, Sofus Laguna, Hotter, C., Schäffer, Stefan Alaric, Robinson-Tait, Julian Curry, Thomsen, Jan Westenkær, Zelevinsky, Tanya, Ritsch, H. & Müller, Jörg Helge, 5 Feb 2024, In: Nature Communications. 15, 7 p., 1084.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Det aktive atomur - en laser i sin reneste form
Tang, M. & Schäffer, Stefan Alaric, 1 Dec 2018, In: Kvant. 4, p. 20-23Research output: Contribution to journal › Journal article › Communication
- Published
Dynamics of bad-cavity-enhanced interaction with cold Sr atoms for laser stabilization
Schäffer, Stefan Alaric, Christensen, B. T. R., Henriksen, M. R. & Thomsen, Jan Westenkær, 24 Jul 2017, In: Physical Review A. 96, 1, 013847.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Faraday-Shielded dc Stark-Shift-Free Optical Lattice Clock
Beloy, K., Zhang, X., McGrew, W. F., Hinkley, N., Yoon, T. H., Nicolodi, D., Fasano, R. J., Schäffer, Stefan Alaric, Brown, R. C. & Ludlow, A. D., 2 May 2018, In: Physical Review Letters. 120, 18, 5 p., 183201.Research output: Contribution to journal › Journal article › Research › peer-review
Frequency ratio measurements at 18-digit accuracy using an optical clock network
Boulder Atomic Clock Optical Network (BACON) Collaboration*, B. A. C. O. N. (. C., 25 Mar 2021, In: Nature. 591, 7851, p. 564-569 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
- Published
Incorporating an Optical Clock into a Time Scale at NIST: Simulations and Preliminary Real-Data Analysis
Sherman, J., Fortier, T., Yao, J., Parker, J., Levine, T., Savory, J., Romisch, S., McGrew, W., Zhang, X., Nicolodi, D., Fasano, R., Schäffer, Stefan Alaric, Beloy, K. & Ludlow, A., 29 Jan 2018, Proceedings of the 49th Annual Precise Time and Time Interval Systems and Applications Meeting. Reston, Virginia : Wiley, p. 11-21Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
ID: 143261181
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Towards passive and active laser stabilization using cavity-enhanced atomic interaction
Research output: Contribution to journal › Journal article › Research › peer-review
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152
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Towards the optical second: verifying optical clocks at the SI limit
Research output: Contribution to journal › Journal article › Research › peer-review
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53
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AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space
Research output: Contribution to journal › Journal article › Research › peer-review
Published