Details
| Original language | English |
|---|---|
| Article number | 123034 |
| Journal | New journal of physics |
| Volume | 21 |
| Issue number | 12 |
| Publication status | Published - 17 Dec 2019 |
Abstract
We spectroscopically investigate a pathway for the conversion of 23Na39K Feshbach molecules into rovibronic ground state molecules via stimulated Raman adiabatic passage. Using photoassociation spectroscopy from the diatomic scattering threshold in the a 3Σ+ potential, we locate the resonantly mixed electronically excited intermediate states |B1Π, v=8⟩ and |c3Σ+, v=30⟩ which, due to their singlet-triplet admixture, serve as an ideal bridge between predominantly a 3Σ+ Feshbach molecules and pure X 1Σ+ ground state molecules. We investigate their hyperfine structure and present a simple model to determine the singlet-triplet coupling of these states. Using Autler-Townes spectroscopy, we locate the rovibronic ground state of the 23Na39K molecule (X1Σ+, v=0, N=0⟩) and the second rotationally excited state N = 2 to unambiguously identify the ground state. We also extract the effective transition dipole moment from the excited to the ground state. Our investigations result in a fully characterized scheme for the creation of ultracold bosonic 23Na39K ground state molecules.
Keywords
- bosonic quantum gases, molecular spectroscopy, STIRAP, ultracold polar molecules
ASJC Scopus subject areas
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In: New journal of physics, Vol. 21, No. 12, 123034, 17.12.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A pathway to ultracold bosonic 23Na39K ground state molecules
AU - Voges, Kai K.
AU - Gersema, Philipp
AU - Hartmann, Torsten
AU - Schulze, Torben A.
AU - Zenesini, Alessandro
AU - Ospelkaus, Silke
PY - 2019/12/17
Y1 - 2019/12/17
N2 - We spectroscopically investigate a pathway for the conversion of 23Na39K Feshbach molecules into rovibronic ground state molecules via stimulated Raman adiabatic passage. Using photoassociation spectroscopy from the diatomic scattering threshold in the a 3Σ+ potential, we locate the resonantly mixed electronically excited intermediate states |B1Π, v=8⟩ and |c3Σ+, v=30⟩ which, due to their singlet-triplet admixture, serve as an ideal bridge between predominantly a 3Σ+ Feshbach molecules and pure X 1Σ+ ground state molecules. We investigate their hyperfine structure and present a simple model to determine the singlet-triplet coupling of these states. Using Autler-Townes spectroscopy, we locate the rovibronic ground state of the 23Na39K molecule (X1Σ+, v=0, N=0⟩) and the second rotationally excited state N = 2 to unambiguously identify the ground state. We also extract the effective transition dipole moment from the excited to the ground state. Our investigations result in a fully characterized scheme for the creation of ultracold bosonic 23Na39K ground state molecules.
AB - We spectroscopically investigate a pathway for the conversion of 23Na39K Feshbach molecules into rovibronic ground state molecules via stimulated Raman adiabatic passage. Using photoassociation spectroscopy from the diatomic scattering threshold in the a 3Σ+ potential, we locate the resonantly mixed electronically excited intermediate states |B1Π, v=8⟩ and |c3Σ+, v=30⟩ which, due to their singlet-triplet admixture, serve as an ideal bridge between predominantly a 3Σ+ Feshbach molecules and pure X 1Σ+ ground state molecules. We investigate their hyperfine structure and present a simple model to determine the singlet-triplet coupling of these states. Using Autler-Townes spectroscopy, we locate the rovibronic ground state of the 23Na39K molecule (X1Σ+, v=0, N=0⟩) and the second rotationally excited state N = 2 to unambiguously identify the ground state. We also extract the effective transition dipole moment from the excited to the ground state. Our investigations result in a fully characterized scheme for the creation of ultracold bosonic 23Na39K ground state molecules.
KW - bosonic quantum gases
KW - molecular spectroscopy
KW - STIRAP
KW - ultracold polar molecules
UR - http://www.scopus.com/inward/record.url?scp=85081656962&partnerID=8YFLogxK
U2 - https://doi.org/10.48550/arXiv.1910.13771
DO - https://doi.org/10.48550/arXiv.1910.13771
M3 - Article
AN - SCOPUS:85081656962
VL - 21
JO - New journal of physics
JF - New journal of physics
SN - 1367-2630
IS - 12
M1 - 123034
ER -