Deterministic phase measurements exhibiting super-sensitivity and super-resolution

Title

Deterministic phase measurements exhibiting super-sensitivity and super-resolution

 Author

Schäfermeier, C. (TU Delft QN/Groeblacher Lab; Technical University of Denmark)
Ježek, Miroslav (Palacky University)
Madsen, Lars S. (Technical University of Denmark; University of Queensland)
Gehring, Tobias (Technical University of Denmark)
Andersen, Ulrik L. (Technical University of Denmark)

Date

2018-01-20

 Abstract

Phase super-sensitivity is obtained when the sensitivity in a phase measurement goes beyond the quantum shot noise limit, whereas super-resolution is obtained when the interference fringes in an interferometer are narrower than half the input wavelength. Here we show experimentally that these two features can be simultaneously achieved using a relatively simple setup based on Gaussian states and homodyne measurement. Using 430 photons shared between a coherent and a squeezed vacuum state, we demonstrate a 22-fold improvement in the phase resolution, while we observe a 1.7-fold improvement in the sensitivity. In contrast to previous demonstrations of super-resolution and super-sensitivity, this approach is fully deterministic.


 To reference this document use:

http://resolver.tudelft.nl/uuid:4e18bdc7-ee79-477c-8d49-3b9bc0ca2e10

 DOI

https://doi.org/10.1364/OPTICA.5.000060

 ISSN

2334-2536

 Source

Optica, 5 (1), 60-64

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2018 C. Schäfermeier, Miroslav Ježek, Lars S. Madsen, Tobias Gehring, Ulrik L. Andersen
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