Extended Coherence Time on the Clock Transition of Optically Trapped Rubidium

Journal Article · Fri Jun 17 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.240801· OSTI ID:21567458

Kleine Buening, G; Will, J; Ertmer, W; Rasel, E; Klempt, C ^[1]; Arlt, J ^[2]; Ramirez-Martinez, F; Rosenbusch, P ^[3]; Piechon, F ^[4]

---

1. Institut fuer Quantenoptik, Leibniz Universitaet Hannover, Welfengarten 1, 30167 Hannover (Germany)
2. QUANTOP, Institut for Fysik og Astronomi, Aarhus Universitet, Ny Munkegade 120, 8000 Aarhus C (Denmark)
3. LNE-SYRTE, Observatoire de Paris, CNRS, UPMC, 61 av de l'Observatoire, 75014 Paris (France)
4. Laboratoire de Physique des Solides, CNRS, UMR 8502, Univ. Paris-Sud, 91405 Orsay (France)

Optically trapped ensembles are of crucial importance for frequency measurements and quantum memories but generally suffer from strong dephasing due to inhomogeneous density and light shifts. We demonstrate a drastic increase of the coherence time to 21 s on the magnetic field insensitive clock transition of {sup 87}Rb by applying the recently discovered spin self-rephasing [C. Deutsch et al., Phys. Rev. Lett. 105, 020401 (2010)]. This result confirms the general nature of this new mechanism and thus shows its applicability in atom clocks and quantum memories. A systematic investigation of all relevant frequency shifts and noise contributions yields a stability of 2.4x10{sup -11{tau}-1/2}, where {tau} is the integration time in seconds. Based on a set of technical improvements, the presented frequency standard is predicted to rival the stability of microwave fountain clocks in a potentially much more compact setup.

• OSTI ID: 21567458
• Journal Information: Physical Review Letters, Vol. 106, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.106.240801; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DENSITY
FREQUENCY MEASUREMENT
MAGNETIC FIELDS
MICROWAVE RADIATION
NOISE
RUBIDIUM
RUBIDIUM 87
SPIN
STABILITY
TRAPPING
VISIBLE RADIATION
ALKALI METALS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
ELECTROMAGNETIC RADIATION
ELEMENTS
INTERMEDIATE MASS NUCLEI
ISOTOPES
METALS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
RADIOISOTOPES
RUBIDIUM ISOTOPES
YEARS LIVING RADIOISOTOPES