J. A. Blackmore
Ultracold molecules for quantum simulation: rotational coherence in CaF and RbCs
Blackmore, J. A.; Caldwell, L.; Gregory, P. D.; Bridge, E. M.; Sawant, R.; Aldegunde, J.; Mur-Petit, J.; Jaksch, D.; Hutson, J. M.; Sauer, B. E.; Tarbutt, M. R.; Cornish, S. L.
Authors
L. Caldwell
P. D. Gregory
E. M. Bridge
R. Sawant
J. Aldegunde
J. Mur-Petit
D. Jaksch
Professor Jeremy Hutson j.m.hutson@durham.ac.uk
Professor
B. E. Sauer
M. R. Tarbutt
Professor Simon Cornish s.l.cornish@durham.ac.uk
Professor
Abstract
Polar molecules offer a new platform for quantum simulation of systems with long-range interactions, based on the electrostatic interaction between their electric dipole moments. Here, we report the development of coherent quantum state control using microwave fields in $^{40}$Ca$^{19}$F and $^{87}$Rb$^{133}$Cs molecules, a crucial ingredient for many quantum simulation applications. We perform Ramsey interferometry measurements with fringe spacings of $\sim 1~\rm kHz$ and investigate the dephasing time of a superposition of $N=0$ and $N=1$ rotational states when the molecules are confined. For both molecules, we show that a judicious choice of molecular hyperfine states minimises the impact of spatially varying transition-frequency shifts across the trap. For magnetically trapped $^{40}$Ca$^{19}$F we use a magnetically insensitive transition and observe a coherence time of 0.61(3)~ms. For optically trapped $^{87}$Rb$^{133}$Cs we exploit an avoided crossing in the AC Stark shifts and observe a maximum coherence time of 0.75(6)~ms.
Citation
Blackmore, J. A., Caldwell, L., Gregory, P. D., Bridge, E. M., Sawant, R., Aldegunde, J., Mur-Petit, J., Jaksch, D., Hutson, J. M., Sauer, B. E., Tarbutt, M. R., & Cornish, S. L. (2018). Ultracold molecules for quantum simulation: rotational coherence in CaF and RbCs. Quantum Science and Technology, 4(1), Article 014010. https://doi.org/10.1088/2058-9565/aaee35
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 5, 2018 |
Online Publication Date | Dec 5, 2018 |
Publication Date | Dec 5, 2018 |
Deposit Date | Sep 18, 2018 |
Publicly Available Date | Dec 7, 2018 |
Journal | Quantum Science and Technology |
Publisher | IOP Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 4 |
Issue | 1 |
Article Number | 014010 |
DOI | https://doi.org/10.1088/2058-9565/aaee35 |
Public URL | https://durham-repository.worktribe.com/output/1319239 |
Related Public URLs | https://arxiv.org/abs/1804.02372 |
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