558 citations · 1.1k across the 11 of their papers we have counts for
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Exploring six modes of an optical parametric oscillator
Luis F. Muñoz-Martínez, Felippe Alexandre Silva Barbosa, Antônio Sales Coelho +4
We measure the complete quantum state for six modes of the electromagnetic field produced by an optical parametric oscillator. The investigation involves the sideband of the intens…
Phase coherent resonator detection as a complete quantum measurement of the two-mode spectral quantum state of light
F. A. S. Barbosa, A. S. Coelho, K. N. Cassemiro +3
The introduction of phase coherence in the detection of quantum noise of light yields a pure quantum measurement of spectral modes. We theoretically show that such coherent quantum…
Analyzing the Gaussian character of the spectral quantum state of light via quantum noise measurements
A. S. Coelho, F. A. S. Barbosa, K. N. Cassemiro +3
Gaussian quantum states hold special importance in the continuous variable (CV) regime. In quantum information science, the understanding and characterization of central resources…
Quantum state engineering of light with continuous-wave optical parametric oscillators
Olivier Morin, Jianli Liu, Kun Huang +3
The ability to engineer the quantum state of traveling optical fields is a central requirement for quantum information science and technology, including quantum communication, comp…
Quantum state reconstruction of spectral field modes: homodyne and resonator detection schemes
Felippe A. S. Barbosa, Antonio S. Coelho, Katiuscia N. Cassemiro +4
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 cont…
Robustness of bipartite Gaussian entangled beams propagating in lossy channels
F. A. S. Barbosa, A. S. Coelho, A. J. de Faria +4
Subtle quantum properties offer exciting new prospects in optical communications. Quantum entanglement enables the secure exchange of cryptographic keys and the distribution of qua…
Experimental demonstration of three-color entanglement
A. S. Coelho, F. A. S. Barbosa, K. N. Cassemiro +3
Entanglement is the essential quantum resource for a potential speed-up of information processing, as well as for sophisticated quantum communication. Quantum information networks…
Disentanglement in Bipartite Continuous-Variable Systems
F. A. S. Barbosa, A. S. Coelho, A. J. de Faria +4
Entanglement in bipartite continuous-variable systems is investigated in the presence of partial losses, such as those introduced by a realistic quantum communication channel, e.g.…