Time-resolved second-order autocorrelation function of parametric downconversion
arXiv:2502.07691 · doi:10.1103/7ckm-tm3r
Abstract
We study a possibility of measuring the time-resolved second-order autocorrelation function of one of two beams generated in type-II parametric downconversion by means of temporal magnification of this beam, bringing its correlation time from the picosecond to the nanosecond scale, which can be resolved by modern photodetectors. We show that such a measurement enables one to infer directly the degree of global coherence of that beam, which is linked by a simple relation to the number of modes characterizing the entanglement between the two generated beams. We illustrate the proposed method by an example of photon pairs generated in a periodically poled KTP crystal with a symmetric group velocity matching for various durations of the pump pulse, resulting in different numbers of modes. Our theoretical model also shows that the magnified double-heralded autocorrelation function of one beam exhibits a local maximum around zero delay time, corresponding to photon bunching at a short time scale.
15 pages, 6 figures, final accepted version
References in corpus (37)
- The nitrogen-vacancy colour centre in diamond
- Heralded Generation of Ultrafast Single Photons in Pure Quantum States
- Analysis and interpretation of high transverse entanglement in optical parametric down conversion
- Photon temporal modes: a complete framework for quantum information science
- Probing multimode squeezing with correlation functions
- Single organic molecules for photonic quantum technologies
- Bandwidth manipulation of quantum light by an electro-optic time lens
- Theory of quantum frequency conversion and type-II parametric down-conversion in the high-gain regime
- Tailoring nonlinear processes for quantum optics with pulsed temporal-mode encodings
- Spectral compression of single photons
- Generating Entangled Two-Photon States with Coincident Frequencies
- The Mobius function is strongly orthogonal to nilsequences
- Coherence measures for heralded single-photon sources
- Properties of bright squeezed vacuum at increasing brightness
- Dimensionality of the spatio-temporal entanglement of PDC photon pairs
- Characterization of the non-classical nature of conditionally prepared single photons
- Time ordering effects in the generation of entangled photons using nonlinear optical processes
- Optical-domain spectral super-resolution via a quantum-memory-based time-frequency processor
- Interfacing picosecond and nanosecond quantum light pulses
- Temporal and spectral manipulations of correlated photons using a time-lens
- Bloch-Messiah reduction for twin beams of light
- Space-time duality and quantum temporal imaging
- Generation of monocycle squeezed light in chirped quasi-phase-matched nonlinear crystals
- Experimental implementation of the optical fractional Fourier transform in the time-frequency domain
- Bloch-Messiah decomposition and Magnus expansion for parametric down-conversion with monochromatic pump
- Temporal imaging for ultra-narrowband few-photon states of light
- Quantum temporal imaging: application of a time lens to quantum optics
- Comment on "Coherence measures for heralded single-photon sources"
- Aperiodic electro-optic time lens for spectral manipulation of single-photon pulses
- Schmidt-like coherent mode decomposition and spatial intensity correlations of thermal light
- Thermal-difference states of light: quantum states of heralded photons
- Generator of spatial evolution of the electromagnetic field
- Reconstructing 2D spatial modes for classical and quantum light
- Theory of Multimode Squeezed Light Generation in Lossy Media
- Erecting time telescope for photonic quantum networks
- Interferometric sorting of temporal Hermite-Gauss modes via temporal Gouy phase
- Few-mode squeezing in type-I parametric downconversion by complete group velocity matching