A robust verification of the quantum nature of light

Abstract

We present a conditional experiment involving a parametric amplifier and an avalanche photodetector to generate highly nonclassical states of the radiation field. The nonclassicality is robust against amplifier gain, detector efficiency and dark counts. At the output all the generalized Wigner functions have negative values, and this is exploited in order to reveal the nonclassicality through quantum homodyne tomography.

References in corpus (1)

• Quantum state reconstruction of the single-photon Fock state

Cited by in corpus (11)

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• Detection of quantum light in the presence of noise
• Quantum state engineering assisted by entanglement
• The quantum-classical transition in thermally seeded parametric downconversion
• Engineering Quantum Jump Superoperators for Single Photon Detectors
• Full time-dependent counting statistics of highly entangled biphoton states
• Isospectral oscillators as a resource for quantum information processing