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

verfasst von

Fabian Wolf, Chunyan Shi, Jan C. Heip, Manuel Gessner, Luca Pezzè, Augusto Smerzi, Marius Schulte, Klemens Hammerer, Piet Oliver Schmidt

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.

Organisationseinheit(en)

Institut für Theoretische Physik
Institut für Quantenoptik
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)

Externe Organisation(en)

Physikalisch-Technische Bundesanstalt (PTB)
Consiglio Nazionale delle Ricerche (CNR)
European Laboratory for Non-linear Spectroscopy (LENS)
Quantum Science and Technology in Arcetri

Typ

Artikel

Journal

Nature Communications

Band

10

ISSN

2041-1723

Publikationsdatum

02.07.2019

Publikationsstatus

Elektronisch veröffentlicht (E-Pub)

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Chemie (insg.), Biochemie, Genetik und Molekularbiologie (insg.), Physik und Astronomie (insg.)

Elektronische Version(en)

https://doi.org/10.48550/arXiv.1807.01875 (Zugang: Offen)
https://doi.org/10.1038/s41467-019-10576-4 (Zugang: Offen)