Entangled States in Interferometry

We show how some entangled quantum states can be used to improve interferometric measurements. We describe why Schrodinger-cat states are very sensitive to relative-phase shifts and why relative-phase states as described by A. Luis and L.L. Sanchez-Soto resolve the interval [0, 2pi] well. We also de...

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Bibliographic Details
Published inActa physica Polonica, A Vol. 101; no. 1; pp. 37 - 46
Main Authors Hessmo, B., Söderholm, J., Björk, G.
Format Journal Article
LanguageEnglish
Published 01.01.2002
Subjects
relative phase
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Summary:We show how some entangled quantum states can be used to improve interferometric measurements. We describe why Schrodinger-cat states are very sensitive to relative-phase shifts and why relative-phase states as described by A. Luis and L.L. Sanchez-Soto resolve the interval [0, 2pi] well. We also describe how the quantum concept of well-defined relative-phase and the classical visibility of an interference pattern are related.
ISSN:0587-4246
1898-794X
1898-794X
DOI:10.12693/APhysPolA.101.37