SYMPATHETIC SIDEBAND COOLING FOR MOLECULAR SPECTROSCOPY

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

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, 032519 (2011).

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).

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).

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).

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

EXPERIMENT 40Ca+ 40CaH+

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).

OBSERVATION OF SIDEBANDS

SIDEBAND COOLING OF Ca+

SIDEBAND COOLING OF Ca+

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

SIDEBAND COOLING OF CaH+ COM

SIDEBAND COOLING OF CaH+ BM

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

ACKNOWLEDGEMENTS ww2.chemistry.gatech.edu/brownlab.

QUESTIONS?