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Volumn 327, Issue 5967, 2010, Pages 853-857

Quantum-state controlled chemical reactions of ultracold potassium-rubidium molecules

Author keywords

[No Author keywords available]

Indexed keywords

POTASSIUM; RUBIDIUM;

EID: 76749131169     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1184121     Document Type: Article
Times cited : (992)

References (46)
  • 1
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    • 34548222142 scopus 로고    scopus 로고
    • L. Che et al., Science 317, 1061 (2007).
    • (2007) Science , vol.317 , pp. 1061
    • Che, L.1
  • 19
  • 29
    • 53749106132 scopus 로고    scopus 로고
    • K.-K. Ni et al., Science 322, 231 (2008).
    • (2008) Science , vol.322 , pp. 231
    • Ni, K.-K.1
  • 32
    • 76749166176 scopus 로고    scopus 로고
    • note
    • F′ =-11/2>. Any trapped atoms left after this removal are below our detection limit, which is about 1000 atoms.
  • 33
    • 76749165700 scopus 로고    scopus 로고
    • note
    • -10 m.
  • 34
    • 76749169739 scopus 로고    scopus 로고
    • note
    • 6, used here for KRb + KRb, KRb + K, and KRb + Rb potentials were provided to us by S. Kotochigova. This was done using nonrelativistic ab initio calculations of the dynamic polarizability of KRb in the standard formula for the van der Waals coefficient (43, 44), including the contributions from the spectrum of electronically excited states and the ground-state rovibrational levels.
  • 35
    • 76749153300 scopus 로고    scopus 로고
    • note
    • 5 s.
  • 40
    • 76749127460 scopus 로고    scopus 로고
    • note
    • F =-9/2> to |9/2,-5/2> using two successive radio-frequency (rf) pulses. We then clean out K atoms in the |9/2,-9/2> state using resonant light as in (32). Once these atoms are heated out of the trap, we again use rf pulses to spin-flip all K |9/2,-5/2> atoms back down to |9/2,-9/2>. To selectively vary the density of Rb, we perform a complete spin flip from |1, 1> to |2, 2> and then turn on resonant light for a duration between 1 and 10 ms. The resonant light both removes Rb atoms and heats the remaining gas. After the resonant light pulse, Rb atoms are transfered back to the lowest hyperfine state |1, 1>. We then apply an additional resonant light pulse to remove any residual Rb in |2, 2>, thus ensuring that all Rb atoms are in the |1, 1> state.
  • 46
    • 76749095343 scopus 로고    scopus 로고
    • note
    • Supported by NIST Innovations in Measurement Science-Ultracold Stable Molecules, NSF Physics Frontier Center at JILA, U.S. Department of Energy, Air Force Office of Scientific Research MURI on Ultracold Molecules, and a NSF graduate fellowship (B.N.) and by Office of Naval Research grant N0001409IP20041 (P.S.J.). We thank S. Kotochigova for providing her calculations of the van der Waals dispersion coefficients that are relevant to our experiments.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.