1. SYMPATHETIC SIDEBAND COOLING FOR MOLECULAR SPECTROSCOPY
René Rugango
Georgia Tech
Kenneth Brown Lab
June 19, 2014

2. SPECTROSCOPY OF MOLECULAR IONS
Quantum Information
Cold Molecules
media.economist.com
jilawww.colorado.edu
REMPD on CaH+
Rotational Spectroscopy of HD+
Shen, J. et al., Phys. Rev. A 85, (2011).

3. SPECTROSCOPY OF MOLECULAR IONS
Very precise measurement (uncertainty of 3e-11) of me using C5+
Time variation of fundamental
Constants (me/mp)
Sturm, S. et al., Nature 506, 467 (2014).

4. SPECTROSCOPY OF MOLECULAR IONS
NON-DESTRUCTIVE METHODS
Sympathetic Heating Spectroscopy (SHS)
C. R. Clark, J. E. Goeders, Y. K. Dodia, C. R. Viteri, and K. R. Brown, Phys. Rev. A 81, (2010).

5. SPECTROSCOPY OF MOLECULAR IONS
NON-DESTRUCTIVE METHODS
Quantum Sympathetic Heating Spectroscopy (QSHS)
or Photon Recoil Spectroscopy
Wan, Y. et al., Nature Comm. 5, 3096 (2014).

6. SPECTROSCOPY OF MOLECULAR IONS
NON-DESTRUCTIVE METHODS
Quantum Logic Spectroscopy (QLS)
Only for long-lived excited states
Schmidt, P.O et al., Science 309, 749 (2005).

7. EXPERIMENT

8. EXPERIMENT
40Ca+
40CaH+

9. MASS SPECTROMETRY WITH SIDEBANDS
QSHS AND QLS:
-Sideband cooling of CaH+
-Detection
CaH+ cooled sympathetically
Breathing mode (BM)
Center of mass mode (COM)
J. E. Goeders, C. R. Clark, G. Vittorini, K. Wright, C. R. Viteri, and K. R. Brown, J. Phys. Chem. A. 117, 9725 (2013).

10. OBSERVATION OF SIDEBANDS

11. SIDEBAND COOLING OF Ca+

12. SIDEBAND COOLING OF Ca+

13. SIDEBAND COOLING OF CaH+ (PREVIOUS WORK)
Gregers Poulsen, PhD thesis, University of Aarhus, November 2011.

14. SIDEBAND COOLING OF CaH+
COM

15. SIDEBAND COOLING OF CaH+BM

16. CONCLUSION AND OUTLOOK
Interest in non-destructive methods (QSHS AND QLS)
Sideband cooling of 40Ca+ achieved on three modes
Sideband cooling of 40CaH+achieved on the COM and BM modes
Next: detection of vibrational overtones using QSHS and QLS

17. ACKNOWLEDGEMENTS
ww2.chemistry.gatech.edu/brownlab.

18. QUESTIONS?