| Zugriffsnummer | 40825 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Lattice-induced photon scattering in an optical lattice clock |
| Autor(in); Institution |
Dörscher, Sören; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Schwarz, Roman; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Al-Masoudi, Ali; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Falke, Stephan; Toptica Photonics, Gräfelfing, GERMANY
Sterr, Uwe; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
Lisdat, Christian; 4.3, Quantenoptik und Längeneinheit, PTB-Braunschweig
|
| Quelle/Jahr | Physical Review A: 97 (2018), 6, 1 - 9 |
| Artikelnummer | 063419 |
| ISSN | 2469-9926 (ONLINE) |
| DOI | |
| URL | |
| Verlag | College Park, Md.: American Physical Society |
| Freie Schlagworte | optical clock ; atomic clock ; optical lattice clock ; optical lattice ; strontium ; photon scattering |
| Zusammenfassung | We investigate scattering of lattice laser radiation in a strontium optical lattice clock and its implications for operating clocks at interrogation times up to several tens of seconds. Rayleigh scattering does not cause significant decoherence of the atomic superposition state near a magic wavelength. Among the Raman scattering processes, lattice-induced decay of the excited state (5s5p) 3P0 to the ground state (5s2) 1S0 via the state (5s5p) 3P1 is particularly relevant, as it reduces the effective lifetime of the excited state and gives rise to quantum projection noise in spectroscopy. We observe this process in our experiment and find a decay rate of 556(15) x 10-6s-1 per photon recoil energy Er of effective lattice depth, which agrees well with the rate we predict from atomic data. We also derive a natural lifetime τ = 330(140) s of the excited state 3P0 from our observations. Lattice-induced decay thus exceeds spontaneous decay at typical lattice depths used by present clocks. It eventually limits interrogation times in clocks restricted to high-intensity lattices but can be largely avoided, e.g., by operating them with shallow lattice potentials |
| Förderinformationen (1) |
Förderername: Deutsche Forschungsgemeinschaft (DFG)
Förderer ID: 0000 0001 2096 9829 Förderer ID Typ: ISNI Titel der Förderung: CRC 1227 (DQ-mat, project B02) ; RTG 1729 |