Precision molecular spectroscopy for ground state transfer of molecular quantum gases

Johann G. Danzl, Manfred J. Mark, Elmar Haller, Mattias Gustavsson, Nadia Bouloufa, Olivier Dulieu, Helmut Ritsch, Russell Hart, Hanns-Christoph Nägerl

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

One possibility for the creation of ultracold, high phase space density quantum gases of molecules in the rovibronic ground state relies on first associating weakly-bound molecules from quantum-degenerate atomic gases on a Feshbach resonance and then transferring the molecules via several steps of coherent two-photon stimulated Raman adiabatic passage (STIRAP) into the rovibronic ground state. Here, in ultracold samples of Cs(2) Feshbach molecules produced out of ultracold samples of Cs atoms, we observe several optical transitions to deeply-bound rovibrational levels of the excited 0(u)(+) molecular potentials with high resolution. At least one of these transitions, although rather weak, allows efficient STIRAP transfer into the deeply-bound vibrational level vertical bar v = 73> of the singlet X(1)Sigma(+)(g) ground state potential, as recently demonstrated (J. G. Danzl, E. Haller, M. Gustavsson, M. J. Mark, R. Hart, N. Bouloufa, O. Dulieu, H. Ritsch, and II.-C. Nagerl, Science, 2008, 321, 1062). From this level, the rovibrational ground state vertical bar v = 0, J = 0> can be reached with one more transfer step. In total, our results show that coherent ground state transfer for Cs2 is possible using a maximum of two successive two-photon STIRAP processes or one single four-photon STIRAP process.
LanguageEnglish
Pages283-295
Number of pages13
JournalFaraday Discussions
Volume142
DOIs
Publication statusPublished - 15 Apr 2009

Fingerprint

Molecular spectroscopy
molecular spectroscopy
Ground state
Gases
ground state
gases
Molecules
Photons
molecules
photons
Optical transitions
space density
monatomic gases
optical transition
Atoms
high resolution
atoms

Keywords

  • rovibronic ground state
  • ultracold molecules
  • atomic gases

Cite this

Danzl, J. G., Mark, M. J., Haller, E., Gustavsson, M., Bouloufa, N., Dulieu, O., ... Nägerl, H-C. (2009). Precision molecular spectroscopy for ground state transfer of molecular quantum gases. Faraday Discussions, 142, 283-295. https://doi.org/10.1039/b820542f
Danzl, Johann G. ; Mark, Manfred J. ; Haller, Elmar ; Gustavsson, Mattias ; Bouloufa, Nadia ; Dulieu, Olivier ; Ritsch, Helmut ; Hart, Russell ; Nägerl, Hanns-Christoph. / Precision molecular spectroscopy for ground state transfer of molecular quantum gases. In: Faraday Discussions. 2009 ; Vol. 142. pp. 283-295.
@article{9c3cae6a425d475abf2bbb128aead09c,
title = "Precision molecular spectroscopy for ground state transfer of molecular quantum gases",
abstract = "One possibility for the creation of ultracold, high phase space density quantum gases of molecules in the rovibronic ground state relies on first associating weakly-bound molecules from quantum-degenerate atomic gases on a Feshbach resonance and then transferring the molecules via several steps of coherent two-photon stimulated Raman adiabatic passage (STIRAP) into the rovibronic ground state. Here, in ultracold samples of Cs(2) Feshbach molecules produced out of ultracold samples of Cs atoms, we observe several optical transitions to deeply-bound rovibrational levels of the excited 0(u)(+) molecular potentials with high resolution. At least one of these transitions, although rather weak, allows efficient STIRAP transfer into the deeply-bound vibrational level vertical bar v = 73> of the singlet X(1)Sigma(+)(g) ground state potential, as recently demonstrated (J. G. Danzl, E. Haller, M. Gustavsson, M. J. Mark, R. Hart, N. Bouloufa, O. Dulieu, H. Ritsch, and II.-C. Nagerl, Science, 2008, 321, 1062). From this level, the rovibrational ground state vertical bar v = 0, J = 0> can be reached with one more transfer step. In total, our results show that coherent ground state transfer for Cs2 is possible using a maximum of two successive two-photon STIRAP processes or one single four-photon STIRAP process.",
keywords = "rovibronic ground state, ultracold molecules, atomic gases",
author = "Danzl, {Johann G.} and Mark, {Manfred J.} and Elmar Haller and Mattias Gustavsson and Nadia Bouloufa and Olivier Dulieu and Helmut Ritsch and Russell Hart and Hanns-Christoph N{\"a}gerl",
year = "2009",
month = "4",
day = "15",
doi = "10.1039/b820542f",
language = "English",
volume = "142",
pages = "283--295",
journal = "Faraday Discussions",
issn = "1359-6640",

}

Danzl, JG, Mark, MJ, Haller, E, Gustavsson, M, Bouloufa, N, Dulieu, O, Ritsch, H, Hart, R & Nägerl, H-C 2009, 'Precision molecular spectroscopy for ground state transfer of molecular quantum gases' Faraday Discussions, vol. 142, pp. 283-295. https://doi.org/10.1039/b820542f

Precision molecular spectroscopy for ground state transfer of molecular quantum gases. / Danzl, Johann G.; Mark, Manfred J.; Haller, Elmar; Gustavsson, Mattias; Bouloufa, Nadia; Dulieu, Olivier; Ritsch, Helmut; Hart, Russell; Nägerl, Hanns-Christoph.

In: Faraday Discussions, Vol. 142, 15.04.2009, p. 283-295.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Precision molecular spectroscopy for ground state transfer of molecular quantum gases

AU - Danzl, Johann G.

AU - Mark, Manfred J.

AU - Haller, Elmar

AU - Gustavsson, Mattias

AU - Bouloufa, Nadia

AU - Dulieu, Olivier

AU - Ritsch, Helmut

AU - Hart, Russell

AU - Nägerl, Hanns-Christoph

PY - 2009/4/15

Y1 - 2009/4/15

N2 - One possibility for the creation of ultracold, high phase space density quantum gases of molecules in the rovibronic ground state relies on first associating weakly-bound molecules from quantum-degenerate atomic gases on a Feshbach resonance and then transferring the molecules via several steps of coherent two-photon stimulated Raman adiabatic passage (STIRAP) into the rovibronic ground state. Here, in ultracold samples of Cs(2) Feshbach molecules produced out of ultracold samples of Cs atoms, we observe several optical transitions to deeply-bound rovibrational levels of the excited 0(u)(+) molecular potentials with high resolution. At least one of these transitions, although rather weak, allows efficient STIRAP transfer into the deeply-bound vibrational level vertical bar v = 73> of the singlet X(1)Sigma(+)(g) ground state potential, as recently demonstrated (J. G. Danzl, E. Haller, M. Gustavsson, M. J. Mark, R. Hart, N. Bouloufa, O. Dulieu, H. Ritsch, and II.-C. Nagerl, Science, 2008, 321, 1062). From this level, the rovibrational ground state vertical bar v = 0, J = 0> can be reached with one more transfer step. In total, our results show that coherent ground state transfer for Cs2 is possible using a maximum of two successive two-photon STIRAP processes or one single four-photon STIRAP process.

AB - One possibility for the creation of ultracold, high phase space density quantum gases of molecules in the rovibronic ground state relies on first associating weakly-bound molecules from quantum-degenerate atomic gases on a Feshbach resonance and then transferring the molecules via several steps of coherent two-photon stimulated Raman adiabatic passage (STIRAP) into the rovibronic ground state. Here, in ultracold samples of Cs(2) Feshbach molecules produced out of ultracold samples of Cs atoms, we observe several optical transitions to deeply-bound rovibrational levels of the excited 0(u)(+) molecular potentials with high resolution. At least one of these transitions, although rather weak, allows efficient STIRAP transfer into the deeply-bound vibrational level vertical bar v = 73> of the singlet X(1)Sigma(+)(g) ground state potential, as recently demonstrated (J. G. Danzl, E. Haller, M. Gustavsson, M. J. Mark, R. Hart, N. Bouloufa, O. Dulieu, H. Ritsch, and II.-C. Nagerl, Science, 2008, 321, 1062). From this level, the rovibrational ground state vertical bar v = 0, J = 0> can be reached with one more transfer step. In total, our results show that coherent ground state transfer for Cs2 is possible using a maximum of two successive two-photon STIRAP processes or one single four-photon STIRAP process.

KW - rovibronic ground state

KW - ultracold molecules

KW - atomic gases

UR - http://xlink.rsc.org/?DOI=b820542f

U2 - 10.1039/b820542f

DO - 10.1039/b820542f

M3 - Article

VL - 142

SP - 283

EP - 295

JO - Faraday Discussions

T2 - Faraday Discussions

JF - Faraday Discussions

SN - 1359-6640

ER -