Monitoring the quantum-classical transition in thermally seeded parametric down-conversion by intensity measurements

Degiovanni, I. P.; Genovese, M.; Schettini, Valentina; Bondani, Maria; Andreoni, Alessandra; Paris, Matteo G. A.

doi:10.1103/physreva.79.063836

Cited by 23 publications

(17 citation statements)

References 61 publications

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“…In turn, the pair of field modes obtained from thermally seeded PDC is a convenient physical system to analyze the quantum-classical transition in the continuousvariable regime [20]. This scheme has already been investigated in ghost-imaging/diffraction experiments [18], where it was shown that both entanglement and intensity correlations may be tuned upon changing the intensities of the seeds [18,19].…”

Section: Introductionmentioning

confidence: 99%

Nonclassical correlations in non-Markovian continuous-variable systems

et al. 2010

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We consider two identical and noninteracting harmonic oscillators coupled to either two independent bosonic baths or to a common bosonic bath. Under the only assumption, weak coupling, we analyze in detail the non-Markovian short-time-scale evolution of intensity correlations, entanglement, and quantum discord for initial two-mode squeezed-thermal vacuum states. In the independent reservoirs case, we observe the detrimental effect of the environment for all these quantities and we establish a hierarchy for their robustness against the environmental noise. In the common reservoir case, for initial uncorrelated states, we find that only quantum discord can be created via interaction with the bath, while entanglement and subshot noise intensity correlations remain absent.

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Section: Introductionmentioning

confidence: 99%

Nonclassical correlations in non-Markovian continuous-variable systems

et al. 2010

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“…We note that entanglement and nonclassicality of twin beams generated by down-conversion seeded by thermal light have been analyzed in Refs. [46][47][48]. In this case, noise present in the incident thermal fields participates in the nonlinear process and generation of photon pairs.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of nonclassicality, entanglement, and dimensionality of multimode noisy twin beams

2015

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The nonclassicality, entanglement, and dimensionality of a noisy twin beam are determined using a characteristic function of the beam written in the Fock basis. One-to-one correspondence between the negativity quantifying entanglement and the nonclassicality depth is revealed. Twin beams, which are either entangled or nonclassical (independent of their entanglement), are observed only for the limited degrees of noise, which degrades their quantumness. The dimensionality of the twin beam quantified by the participation ratio is compared with the dimensionality of entanglement determined from the negativity. Partitioning of the degrees of freedom of the twin beam into those related to entanglement and to noise is suggested. Both single-mode and multimode twin beams are analyzed. Weak nonclassicality based on integrated-intensity quasidistributions of multimode twin beams is studied. The relation of the model to the experimental twin beams is discussed.

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“…Considering the experimental interest in the frame of quantum optics [28][29][30][31][32], in a recent paper [33] we have considered three different "quantumness" quantifiers applied to the study of quantum-classical transition in a thermal seeded parametric downconversion (PDC): a work that, a part its specific application, has a more general interest since it presents an idea that can find a generalization to various physical systems.…”

Section: Introductionmentioning

confidence: 99%

On the Discrimination Between Classical and Quantum States

et al. 2009

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With the purpose of introducing a useful tool for researches concerning foundations of quantum mechanics and applications to quantum technologies, here This work has been supported by SanPaolo Foundation, Quantum Candela EU Project. G. Brida · I.P. Degiovanni · M. Genovese ( ) · I. Ruo Berchera · V. Schettini Found Phys (2011) 41: 305-316we address three quantumness quantifiers for bipartite optical systems: one is based on sub-shot-noise correlations, one is related to antibunching and one springs from entanglement determination. The specific cases of parametric downconversion seeded by thermal, coherent and squeezed states are discussed in detail.

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Monitoring the quantum-classical transition in thermally seeded parametric down-conversion by intensity measurements

Cited by 23 publications

References 61 publications

Nonclassical correlations in non-Markovian continuous-variable systems

Nonclassical correlations in non-Markovian continuous-variable systems

Comparative study of nonclassicality, entanglement, and dimensionality of multimode noisy twin beams

On the Discrimination Between Classical and Quantum States

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