| Zugriffsnummer | 25950 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Tackling the blackbody shift in a strontium optical lattice clock |
| Autor(in); Institution |
Middelmann, Thomas; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Lisdat, Christian; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Falke, Stephan; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Vellore Winfred, Joseph Sundar Raaj; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Riehle, Fritz; 4, Optik, PTB-Braunschweig
Sterr, Uwe; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
|
| Quelle/Jahr | IEEE Transactions on Instrumentation and Measurement: 60 (2011), 7, 2550 - 2557 |
| ISSN | 0018-9456 |
| DOI | |
| Verlag | New York, NY: IEEE |
| Freie Schlagworte | atomic clocks ; frequency control ; frequency stability ; laser stability ; stark effect ; uncertainty |
| Zusammenfassung | A major obstacle for optical clocks is the frequency shift due to blackbody radiation (BBR). We discuss how one can tackle this problem in an optical lattice clock, in our case, 87Sr: first, by a measurement of the dc-Stark shift of the clock transition and, second, by interrogating the atoms in a cryogenic environment. Both approaches rely on transporting ultracold atoms over several centimeters within a probe cycle. We evaluate the mechanical movement of the optical lattice and conclude that it is feasible to transport the atoms over 50 mm within 300 ms. With this transport, a dc-Stark shift measurement will allow reducing the contribution of the BBR to fractional uncertainty below 2 × 10-17 at room temperature by improving the shift coefficient, known only from atomic-structure calculations up to now.We propose a cryogenic environment at 77 K that will reduce this contribution to a few times 10-18. |
Zitierung
Middelmann, T., Lisdat, C., Falke, S., Vellore Winfred, J. S. R., Riehle, F., & Sterr, U. (2011). Tackling the blackbody shift in a strontium optical lattice clock. IEEE Transactions on Instrumentation and Measurement, 60(7), 2550–2557. https://doi.org/10.1109/tim.2010.2088470