Dual-path state reconstruction scheme for propagating quantum microwaves and detector noise tomography

E. P. Menzel, F. Deppe, M. Mariantoni, M. Á Araque Caballero, A. Baust, T. Niemczyk, E. Hoffmann, A. Marx, E. Solano, R. Gross

Research output: Contribution to journalArticlepeer-review

70 Scopus citations

Abstract

Quantum state reconstruction of weak propagating microwaves to date requires the use of linear amplifiers. We introduce a theory which, even in the presence of significant amplifier noise, allows one to use these devices for measuring all quadrature moments of propagating quantum microwaves based on cross correlations from a dual-path amplification setup. Simultaneously, the detector noise properties are determined, allowing for tomography. We demonstrate the feasibility of our novel concept by proof-of-principle experiments with classical mixtures of weak coherent microwaves.

Original languageEnglish
Article number100401
JournalPhysical Review Letters
Volume105
Issue number10
DOIs
StatePublished - 31 Aug 2010

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