269 citations · 773 across the 16 of their papers we have counts for
15 papers · 1 filter
Hexapartite entanglement in an above-threshold Optical Parametric Oscillator
F. A. S. Barbosa, A. S. Coelho, L. F. Muñoz Martínez +4
We demonstrate, theoretically and experimentally, the generation of hexapartite modal entanglement by the optical parametric oscillator (OPO) operating above the oscillation thresh…
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…
Measurement-induced strong Kerr nonlinearity for weak quantum states of light
Luca S. Costanzo, Antonio S. Coelho, Nicola Biagi +3
Strong nonlinearity at the single photon level represents a crucial enabling tool for optical quantum technologies. Here we report on experimental implementation of a strong Kerr n…
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…
Zero-area single photon pulses
L. S. Costanzo, A. S. Coelho, D. Pellegrino +6
Broadband single photons are usually considered not to couple efficiently to atomic gases because of the large mismatch in bandwidth. Contrary to this intuitive picture, here we de…
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…