2014/10/23 by Marc-Antoine Lemonde, Nicolas Didier, Aashish A. Clerk · 5 citations
Computer Science · Mathematics · Physics and Astronomy · #Amplitude #Degenerate energy levels #Dissipative system #Gaussian #Mathematics #Mechanical and Optical Resonators #Photon #Photon antibunching #Physics #Quantum Information and Cryptography #Quantum electrodynamics #Quantum mechanics #Quantum optics and atomic interactions #Realization (probability) #Statistical physics #Statistics #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physreva.90.063824
published as Phys. Rev. A 90, 063824 (2014) · 12 pages, 5 figures
arxiv created 2014/10/23 · openalex publication_date 2014/12/16 · arxiv updated 2014/12/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Photon antibunching is a quantum phenomenon typically observed in strongly nonlinear systems where photon blockade suppresses the probability of detecting two photons at the same time. Antibunching has also been reported with Gaussian states, where optimized amplitude squeezing yields classically forbidden values of the intensity correlation, g(2)(0)<1. As a consequence, observation of antibunching is not necessarily a signature of photon-photon interactions. To clarify the significance of the intensity correlations, we derive a sufficient condition for deducing whether a field is non-Gaussian based on a g(2)(0) measurement. We then show that the Gaussian antibunching obtained with a degenerate parametric amplifier is close to the ideal case reached using dissipative squeezing protocols. We finally shed light on the so-called unconventional photon blockade effect predicted in a driven two-cavity setup with surprisingly weak Kerr nonlinearities, stressing that it is a particular realization of optimized Gaussian amplitude squeezing.