The quantum-classical transition in thermally seeded parametric downconversion

Abstract

We address the pair of conjugated field modes obtained from parametric-downconversion as a convenient system to analyze the quantum-classical transition in the continuous variable regime. We explicitly evaluate intensity correlations, negativity and entanglement for the system in a thermal state and show that a hierarchy of nonclassicality thresholds naturally emerges in terms of thermal and downconversion photon number. We show that the transition from quantum to classical regime may be tuned by controlling the intensities of the seeds and detected by intensity measurements. Besides, we show that the thresholds are not affected by losses, which only modify the amount of nonclassicality. The multimode case is also analyzed in some detail.

12 pages, 3 figures

References in corpus (23)

• Decoherence, einselection, and the quantum origins of the classical
• Decoherence, the measurement problem, and interpretations of quantum mechanics
• Research on Hidden Variable Theories: a review of recent progresses
• Purity of Gaussian states: measurement schemes and time-evolution in noisy channels
• Sub-shot-noise photon-number correlation in mesoscopic twin-beam of light
• Direct Production of Tripartite Pump-Signal-Idler Entanglement in the Above-Threshold Optical Parametric Oscillator
• Measurement of sub-shot-noise spatial correlations without subtraction of background
• Entanglement and purity of two-mode Gaussian states in noisy channels
• Quantifying decoherence in continuous variable systems
• Three-mode entanglement by interlinked nonlinear interactions in optical ${\chi }^{(2)}$ media
• Multipartite continuous-variable entanglement from concurrent nonlinearities
• High-sensitivity imaging with multi-mode twin beams
• Equivalence between Entanglement and the Optimal Fidelity of Continuous Variable Teleportation
• Nonclassical character of statistical mixtures of the single-photon and vacuum optical states
• Bright tripartite entanglement in triply concurrent parametric oscillation
• Experimental motivation and empirical consistency in minimal no-collapse quantum mechanics
• Minimum decoherence cat-like states in Gaussian noisy channels
• A simple test of quantumness for a single system
• Intensity correlations, entanglement properties and ghost imaging in multimode thermal-seeded parametric downconversion: Theory
• Experimental test of nonclassicality for a single particle
• Quantum-classical correspondence in entanglement production: Entropy and classical tori
• Ghost imaging with intense fields from chaotically-seeded parametric downconversion
• 3D phase-matching conditions for the generation of entangled triplets by chi(2) interlinked interactions

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• Finite-time quantum-to-classical transition for a Schroedinger-cat state
• On the discrimination between classical and quantum states
• Effect of incoherent pump on two-mode entanglement in optical parametric generation
• Eliminating Thermal IR Background Noise by Imaging with Undetected Photons
• Entanglement and nonclassicality in four-mode Gaussian states generated via parametric down-conversion and frequency up-conversion