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Strong coupling of a single ion to an optical cavity

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posted on 2023-06-09, 19:50 authored by Hiroki TakahashiHiroki Takahashi, Ezra Kassa, Costas Marios Christoforou, Matthias KellerMatthias Keller
Strong coupling between an atom and an electromagnetic resonator is an important condition in cavity quantum electrodynamics (CQED). While strong coupling in various physical systems has been achieved so far, it remained elusive for single atomic ions. Here we achieve a coupling strength of 2pix(12.3+/-0.1)MHz between a single 40Ca+ ion and an optical cavity, exceeding both atomic and cavity decay rates which are 2pix11.5 and 2pix(4.1+/-0.1)MHz respectively. We use cavity assisted Raman spectroscopy to precisely characterize the ion-cavity coupling strength and observe a spectrum featuring the normal mode splitting in the cavity transmission due to the ion-cavity interaction. Our work paves the way towards new applications of CQED utilizing single trapped ions in the strong coupling regime for quantum optics and quantum technologies.

Funding

UK Quantum Technology Hub: NQIT-Networked Quantum Information Technologies; G1503; EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCIL; EP/M013243/1

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Physical Review Letters (PRL)

ISSN

0031-9007

Publisher

American Physical Society

Issue

1

Volume

124

Article number

a013602

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Sussex Centre for Quantum Technologies Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-12-04

First Open Access (FOA) Date

2019-12-04

First Compliant Deposit (FCD) Date

2019-12-03

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