| Zugriffsnummer | 46071 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Motional heating of spatially extended ion crystals |
| Autor(in); Institution |
Kalincev, Dimitri; QUEST, FG 2, Quantenuhren und komplexe Systeme, PTB-Braunschweig
Kulosa, André; QUEST, FG 2, Quantenuhren und komplexe Systeme, PTB-Braunschweig
Yeh, Chih-Han; QUEST, FG 2, Quantenuhren und komplexe Systeme, PTB-Braunschweig
Fürst, Henning A.; QUEST, FG 2, Quantenuhren und komplexe Systeme, PTB-Braunschweig
Mehlstäubler, Tanja E.; QUEST, FG 2, Quantenuhren und komplexe Systeme, PTB-Braunschweig; Leibniz Universität, Institut für Quantenoptik, Hannover, GERMANY
|
| Quelle/Jahr | Quantum Science and Technology: 6 (2021), 3, 1 - 22 |
| Availability | [online only] |
| ISSN | 2058-9565 |
| URL | |
| Verlag | Bristol: IOP Publishing |
| Freie Schlagworte | Multi-ion clock ; Vibrational mode heating ; Ion Coulomb crystal ; Precision metrology ; Radio frequency noise |
| Zusammenfassung | We study heating of motional modes of a single ion and of extended ion crystals trapped in a linear radio frequency (rf) Paul trap with a precision of Δṅ ≈ 0.1 phonons s-1. Single-ion axial and radial heating rates are consistent and electric field noise has been stable over the course of four years. At a secular frequency of ωsec=2 π × 620 kHz, we measure ṅ = 0.56(6) phonons s-1perion for the center-of-mass (com) mode of linear chains of up to 11 ions and observe no significant heating of the out-of-phase (oop) modes. By displacing the ions away from the nodal line, inducing excess micromotion, rf-noise heats the com mode quadratically as a function of radial displacement r by ṅ(r)/r2=0.89(4) phonons s-1μm-2per ion, while the oop modes are protected from rf-noise induced heating in linear chains. By changing the quality factor of the resonant rf circuit from Q = 542 to Q = 204, we observe an increase of rf-noise by a factor of up to 3. We show that the rf-noise induced heating of motional modes of extended crystals also dependson the symmetry of the crystal and of the mode itself. As an example, we consider several 2D and 3D crystal configurations. Heating rates of up to 500 ph s-1are observed for individual modes, giving rise to a total kinetic energy increase and thus a fractional time dilation shift of up to-0.3×10-18s-1of the total system. In addition, we detail how the excitation probability of the individual ions is reduced and decoherence is increased due to the Debye-Waller effect. |
| Kostenfreier Zugang | Open Access Hybrid |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Zeit und Frequenz |