Characterization of the multimode nature of single-photon sources based on spontaneous parametric down conversion
arXiv:2404.10682 · doi:10.1103/PhysRevA.110.023728
Abstract
Single-photon sources are necessary components for many prospective quantum technologies. One candidate for a single-photon source is spontaneous parametric down conversion combined with a heralding photon detection. The heralded light pulse from such a source, is typically treated as single-mode, this treatment, however, is incomplete. We develop a full multimode description based on the exact Bogoliubov treatment of the down conversion process. We then provide a perturbative and effective treatment, which illustrates the most important physical mechanisms and permits analytical estimates of the success probability and purity of single-photon states under practical heralding conditions, both without relying on the precise detection time of the heralding photon and when accepting photons only in a narrow window around the time of the detection. This permits us to characterize the emitted light under three different assumptions for the pump pulse. For spontaneous parametric down conversion with a very short pump pulse, we find the single-mode description to be accurate, while for longer pump pulses and continuous pumping, a multimode description is necessary. Our findings can be used to guide the design of quantum information protocols based on heralded single-photon sources, as their performance may depend on the multimode nature of the sources.
13 pages, 6 figures
References in corpus (16)
- The Quantum Internet
- On-Demand Single Photons with High Extraction Efficiency and Near-Unity Indistinguishability from a Resonantly Driven Quantum Dot in a Micropillar
- Resource-efficient linear optical quantum computation
- Heralded Generation of Ultrafast Single Photons in Pure Quantum States
- Generation of a superposition of odd photon number states for quantum information networks
- Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
- Probing multimode squeezing with correlation functions
- Long-Distance Entanglement Distribution with Single-Photon Sources
- A fast and robust approach to long-distance quantum communication with atomic ensembles
- Heralded single-photon source utilizing highly nondegenerate, spectrally factorable spontaneous parametric downconversion
- Beyond photon pairs: Nonlinear quantum photonics in the high-gain regime
- Non-Gaussian states from continuous-wave Gaussian light sources
- Cavity enhanced telecom heralded single photons for spin-wave solid state quantum memories
- Photon number states generated from a continuous-wave light source
- Multimode analysis of the light emitted from a pulsed optical parametric oscillator
- Analysis of optical quantum state preparation using photon detectors in the finite-temporal-resolution regime