Experimental and theoretical investigation of a multimode cooling scheme using multiple electromagnetically-induced-transparency resonances

Nils Scharnhorst, Javier Cerrillo, Johannes Kramer, Ian D. Leroux, Jannes B. Wübbena, Alex Retzker, Piet O. Schmidt

Research output: Contribution to journalArticlepeer-review

Abstract

We introduce and demonstrate double-bright electromagnetically-induced-transparency (D-EIT) cooling as an extension to EIT cooling. By involving an additional ground state, two bright states can be shifted individually into resonance for cooling of motional modes of frequencies that may be separated by more than the width of a single EIT cooling resonance. This allows three-dimensional ground-state cooling of a Ca+40 ion trapped in a linear Paul trap with a single cooling pulse. Measured cooling rates and steady-state mean motional quantum numbers for this D-EIT cooling are compared with those of standard EIT cooling as well as concatenated standard EIT cooling pulses for multimode cooling. Experimental results are compared to full-density matrix calculations. We observe a failure of the theoretical description within the Lamb-Dicke regime that can be overcome by a time-dependent rate theory. Limitations of the different cooling techniques and possible extensions to multi-ion crystals are discussed.

Original languageAmerican English
Article number023424
JournalPhysical Review A
Volume98
Issue number2
DOIs
StatePublished - 27 Aug 2018

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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