SYMPATHETIC SIDEBAND COOLING FOR MOLECULAR SPECTROSCOPY Ren Rugango

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

2 SPECTROSCOPY OF MOLECULAR IONS Quantum Information media. economist. com REMPD on Ca. H+ Cold Molecules jilawww. colorado. edu Rotational Spectroscopy of HD+ Shen, J. et al. , Phys. Rev. A 85, 032519 (2011).

3 SPECTROSCOPY OF MOLECULAR IONS Very precise measurement (uncertainty of 3 e-11) of me using C 5+ 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, 043428 (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).

EXPERIMENT 7

EXPERIMENT 8 q 40 Ca+ q 40 Ca. H+

9 MASS SPECTROMETRY WITH SIDEBANDS QSHS AND QLS: -Sideband cooling of Ca. H+ -Detection Ca. H+ 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

SIDEBAND COOLING OF Ca+ 11

SIDEBAND COOLING OF Ca+ 12

13 SIDEBAND COOLING OF Ca. H+ (PREVIOUS WORK) Gregers Poulsen, Ph. D thesis, University of Aarhus, November 2011.

14 SIDEBAND COOLING OF Ca. H+ COM

15 SIDEBAND COOLING OF Ca. H+ BM

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

ACKNOWLEDGEMENTS 17 ww 2. chemistry. gatech. edu/brownlab.

QUESTIONS? 18