22–26 Nov 2021
AlbaNova Main Building
Europe/Stockholm timezone
Please note: ECTI 2021 will be held as a hybrid event.

Quantum simulation and sensing with 2D ion crystals in a Penning trap\^{1,2}

23 Nov 2021, 17:00
30m
Online via Zoom

Online via Zoom

invited talk online ECTI

Speaker

John Bollinger (National Institute of Standards and Technology (NIST))

Description

I will describe a quantum-enhanced sensor to detect weak motional displacements and electric fields using a large crystal of ∼ 150 trapped ions. The center-of-mass vibrational mode of the crystal serves as high-Q mechanical oscillator and the collective electronic spin as the measurement device. By entangling the oscillator and the collective spin before the motional displacement is applied and by controlling the coherent dynamics via a many-body echo that disentangles the spin and motion, we can map the displacement into a spin rotation and avoid quantum back-action and cancel thermal noise. We report quantum enhanced sensitivity to displacements of 8.8 dB below the standard quantum limit and 19 dB below thermal noise. I will discuss how our current sensitivity is likely limited by poor cooling of the ExB in-plane modes. As time permits, I will describe a protocol for introducing general σ_z rotations on rotating 2d ion crystals that would increase the complexity of quantum simulations on this platform.

  1. In collaboration with Kevin A. Gilmore, Matthew Affolter, Robert J. Lewis-Swan, Diego Barberena, Elena Jordan, and Ana Maria Rey.
  2. K. A. Gilmore et. al., Science 373, 673 (2021).

Primary author

John Bollinger (National Institute of Standards and Technology (NIST))

Co-authors

Dr Kevin Gilmore (National Institute of Standards and Technology) Matthew Affolter (NIST) Diego Barberena (Univ. Colorado) Robert Lewis-Swan (Univ. Oklahoma) Elena Jordan (PTB) Ana Maria Rey (Univ. Colorado and NIST)

Presentation materials

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