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Near Ground-State Cooling of Two-Dimensional Trapped-Ion Crystals with More than 100 Ions

Elena Jordan, Kevin A. Gilmore, Athreya Shankar, Arghavan Safavi-Naini, Justin G. Bohnet, Murray J. Holland, and John J. Bollinger
Phys. Rev. Lett. 122, 053603 – Published 7 February 2019
Physics logo See Synopsis: Freezing a 2D Ion Crystal
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Abstract

We experimentally study electromagnetically induced transparency cooling of the drumhead modes of planar two-dimensional arrays with up to N190 Be+ ions stored in a Penning trap. Substantial sub-Doppler cooling is observed for all N drumhead modes. Quantitative measurements for the center-of-mass mode show near ground-state cooling with motional quantum numbers of n¯=0.3±0.2 obtained within 200μs. The measured cooling rate is faster than that predicted by single particle theory, consistent with a quantum many-body calculation. For the lower frequency drumhead modes, quantitative temperature measurements are limited by frequency instabilities, but near ground-state cooling of the full bandwidth is strongly suggested. This advance will greatly improve the performance of large trapped ion crystals in quantum information and metrology applications.

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  • Received 18 September 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.053603

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Synopsis

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Freezing a 2D Ion Crystal

Published 7 February 2019

A laser scheme cools more than a hundred vibrational modes of a 2D crystal to close to their quantum mechanical ground state.

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Authors & Affiliations

Elena Jordan1,*, Kevin A. Gilmore1,2, Athreya Shankar2, Arghavan Safavi-Naini2, Justin G. Bohnet1, Murray J. Holland2, and John J. Bollinger1

  • 1Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
  • 2JILA, NIST, and Department of Physics, University of Colorado Boulder, Boulder, Colorado 80309, USA

  • *elena.jordan@nist.gov

See Also

Modeling near ground-state cooling of two-dimensional ion crystals in a Penning trap using electromagnetically induced transparency

Athreya Shankar, Elena Jordan, Kevin A. Gilmore, Arghavan Safavi-Naini, John J. Bollinger, and Murray J. Holland
Phys. Rev. A 99, 023409 (2019)

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Vol. 122, Iss. 5 — 8 February 2019

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