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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Quantum state reconstruction of spectral field modes: Homodyne and resonator detection schemes

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Barbosa, F. A. S. [1] ; Coelho, A. S. [1] ; Cassemiro, K. N. [2] ; Nussenzveig, P. [1] ; Fabre, C. [3] ; Villar, A. S. [2] ; Martinelli, M. [1]
Total Authors: 7
[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
[2] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE - Brazil
[3] Univ Paris 06, Lab Kastler Brossel, F-75252 Paris - France
Total Affiliations: 3
Document type: Journal article
Source: Physical Review A; v. 88, n. 5 NOV 14 2013.
Web of Science Citations: 8

We revisit the problem of quantum state reconstruction of light beams from the photocurrent quantum noise. As is well known, but often overlooked, two longitudinal field modes contribute to each spectral component of the photocurrent (sideband modes). We show that spectral homodyne detection is intrinsically incapable of providing all the information needed for the full reconstruction of the two-mode spectral quantum state. Such a limitation is overcome by the technique of resonator detection. A detailed theoretical description and comparison of both methods is presented, as well as an experiment to measure the six-mode quantum state of pump-signal-idler beams of an optical parametric oscillator above the oscillation threshold. (AU)

FAPESP's process: 10/08448-2 - Quantum information with continuous variables of atoms and light
Grantee:Paulo Alberto Nussenzveig
Support type: Research Projects - Thematic Grants
FAPESP's process: 09/52157-5 - Teleportation of quantum information between different colors
Grantee:Marcelo Martinelli
Support type: Regular Research Grants
FAPESP's process: 10/52282-1 - Quantum information processing with continuous variables
Grantee:Marcelo Martinelli
Support type: Regular Research Grants