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7 papers · 2 filters
Quantum analysis of the direct measurement of light waves
Pablo L. Saldanha
In a beautiful experiment performed about a decade ago, Goulielmakis et al. made a direct measurement of the electric field of light waves [E. Goulielmakis et al., Science 305, 126…
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…
Dynamics of the reading process of a quantum memory
Milrian S. Mendes, Pablo L. Saldanha, José W. R. Tabosa +1
The mechanism of extraction of information stored in a quantum memory is studied here in detail. We consider memories containing a single excitation of a collective atomic state, w…
Beyond spectral homodyne detection: complete quantum measurement of spectral modes of light
Felippe A. S. Barbosa, Antonio S. Coelho, Katiuscia N. Cassemiro +4
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…
Semiclassical Ehrenfest Paths
Rafael Liberalquino, Fernando Parisio
Trajectories are a central concept in our understanding of classical phenomena and also in rationalizing quantum mechanical effects. In this work we provide a way to determine semi…
Do entangled photons induce two-photon two-atom transitions more efficiently than other states of light ?
Zhan Zheng, Pablo L. Saldanha, Jose R. Rios Leite +1
We study in this paper the efficiency of different two-photon states of light to induce the simultaneous excitation of two atoms of different kinds when the sum of the energies of…