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

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Wolf, F.; Shi, C.; Heip, J.C.; Gessner, M.; Pezzè, L. et al.: Motional Fock states for quantum-enhanced amplitude and phase measurements with trapped ions. In: Nature Communications 10 (2019), Nr. 1, 2929. DOI:

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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.
License of this version: CC BY 4.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2019
Appears in Collections:Fakultät für Mathematik und Physik

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2 image of flag of United States United States 3 11.11%
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4 image of flag of China China 1 3.70%

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