Nature of light correlations in ghost imaging
arXiv:1208.5808 · doi:10.1038/srep00651
Abstract
We investigate the nature of correlations in Gaussian light sources used for ghost imaging. We adopt methods from quantum information theory to distinguish genuinely quantum from classical correlations. Combining a microscopic analysis of speckle-speckle correlations with an effective coarse-grained description of the beams, we show that quantum correlations exist even in `classical'-like thermal light sources, and appear relevant for the implementation of ghost imaging in the regime of low illumination. We further demonstrate that the total correlations in the thermal source beams effectively determine the quality of the imaging, as quantified by the signal-to-noise ratio.
arXiv comment12 pages, 5 figures. To appear in Scientific Reports (NPG)
References in corpus (18)
- Introducing Quantum Discord
- Classical, quantum and total correlations
- Correlated imaging, quantum and classical
- Two-photon "ghost" imaging with thermal light
- Experimental evidence of high-resolution ghost imaging and ghost diffraction with classical thermal light
- Entanglement in continuous variable systems: Recent advances and current perspectives
- Almost all quantum states have non-classical correlations
- Quantum versus classical correlations in Gaussian states
- Gaussian quantum discord
- Role of entanglement in two-photon imaging
- Operational Significance of Discord Consumption: Theory and Experiment
- Simultaneous near-field and far field spatial quantum correlations in spontaneous parametric down-conversion
- Unified Theory of Ghost Imaging with Gaussian-State Light
- Entangled imaging and wave-particle duality: from the microscopic to the macroscopic realm
- Systematic analysis of SNR in bipartite Ghost Imaging with classical and quantum light
- Non-classicality criteria from phase-space representations and information-theoretical constraints are maximally inequivalent
- Homodyne estimation of Gaussian quantum discord
- Experimental Investigation of the Evolution of Gaussian Quantum Discord in an Open System
Cited by in corpus (19)
- Quantum enhanced measurements without entanglement
- Measures and applications of quantum correlations
- Real applications of quantum imaging
- EPR-based ghost imaging using a single-photon-sensitive camera
- Quantum Indistinguishability by Path Identity: The awakening of a sleeping beauty
- Enhanced two-photon absorption using true thermal light
- Quantifying the source of enhancement in experimental continuous variable quantum illumination
- Quantum learning of coherent states
- High visibility temporal ghost imaging with classical light
- Experimental characterization of Gaussian quantum discord generated by four-wave mixing
- Color night vision correlation imaging without an infrared focal plane array
- Unveiling the Hanbury Brown and Twiss effect through Renyi entropy correlations
- Not even 6 dB: Gaussian quantum illumination in thermal background
- On the use of superthermal light for imaging applications
- Exploiting non-trivial spatio-temporal correlations of thermal radiation for sunlight harvesting
- True color night vision correlated imaging based on intensity correlation of light
- Resolution to the quantum-classical dilemma in thermal ghost imaging
- Thermal x-ray diffraction and near-field phase contrast imaging
- Hanbury-Brown and Twiss effect without quantum interference in photon counting regime