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Motional Fock states for quantum-enhanced amplitude and phase measurements with trapped ions

Author

Listed:
  • Fabian Wolf

    (Physikalisch-Technische Bundesanstalt)

  • Chunyan Shi

    (Physikalisch-Technische Bundesanstalt)

  • Jan C. Heip

    (Physikalisch-Technische Bundesanstalt)

  • Manuel Gessner

    (QSTAR, INO-CNR and LENS
    École Normale Supérieure, PSL Université)

  • Luca Pezzè

    (QSTAR, INO-CNR and LENS)

  • Augusto Smerzi

    (QSTAR, INO-CNR and LENS
    Leibniz Universität Hannover)

  • Marius Schulte

    (Leibniz Universität Hannover)

  • Klemens Hammerer

    (Leibniz Universität Hannover)

  • Piet O. Schmidt

    (Physikalisch-Technische Bundesanstalt
    Leibniz Universität Hannover)

Abstract

The quantum noise of the vacuum limits the achievable sensitivity of quantum sensors. In non-classical measurement schemes the noise can be reduced to overcome this limitation. However, schemes based on squeezed or Schrödinger cat states require alignment of the relative phase between the measured interaction and the non-classical quantum state. Here we present two measurement schemes on a trapped ion prepared in a motional Fock state for displacement and frequency metrology that are insensitive to this phase. The achieved statistical uncertainty is below the standard quantum limit set by quantum vacuum fluctuations, enabling applications in spectroscopy and mass measurements.

Suggested Citation

  • Fabian Wolf & Chunyan Shi & Jan C. Heip & Manuel Gessner & Luca Pezzè & Augusto Smerzi & Marius Schulte & Klemens Hammerer & Piet O. Schmidt, 2019. "Motional Fock states for quantum-enhanced amplitude and phase measurements with trapped ions," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
  • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10576-4
    DOI: 10.1038/s41467-019-10576-4
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    Cited by:

    1. Reis, Mauricio & Oliveira, Adelcio C., 2022. "A complementary resource relation of concurrence and roughness for a two-qubit state," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 608(P2).

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