title: Beyond spectral homodyne detection: complete quantum measurement of spectral modes of light.
abstract: Spectral homodyne detection, a widely used technique for measuring quantum properties of light beams, cannot retrieve all the information needed to reconstruct the quantum state of spectral field modes. We show that full quantum state reconstruction can be achieved with the alternative measurement technique of resonator detection. We experimentally demonstrate this difference by engineering a quantum state with features that go undetected by homodyne detection but are clearly revealed by resonator detection.
authors.affiliation: Instituto de Física, Universidade de São Paulo, P.O. Box 66318, 05315-970 São Paulo, São Paulo, Brazil.
authors.forename: F A S
authors.initials: FA
authors.lastname: Barbosa
authors.forename: A S
authors.initials: AS
authors.lastname: Coelho
authors.forename: K N
authors.initials: KN
authors.lastname: Cassemiro
authors.forename: P
authors.initials: P
authors.lastname: Nussenzveig
authors.forename: C
authors.initials: C
authors.lastname: Fabre
authors.forename: M
authors.initials: M
authors.lastname: Martinelli
authors.forename: A S
authors.initials: AS
authors.lastname: Villar