Heralded Generation of Ultrafast Single Photons in Pure Quantum States
arXiv:0711.1054 · doi:10.1103/PhysRevLett.100.133601
Abstract
We present an experimental demonstration of heralded single photons prepared in pure quantum states from a parametric downconversion source. It is shown that, through controlling the modal structure of the photon pair emission, one can generate pairs in factorable states and thence eliminate the need for spectral filters in multiple-source interference schemes. Indistinguishable heralded photons were generated in two independent spectrally engineered sources, and, by performing a Hong-Ou-Mandel interference between them without spectral filters at a raw visibility of 94.4%, their purity was measured to be over 95%.
5 pages, 4 figures
References in corpus (9)
- Resource-efficient linear optical quantum computation
- Experimental entanglement of six photons in graph states
- Entangling Independent Photons by Time Measurement
- Experimental interference of independent photons
- Photonic crystal fibre source of photon pairs for quantum information processing
- Optimal focusing for maximal collection of entangled narrow-band photon pairs into single-mode fibers
- Frequency and temporal effects in linear optical quantum computing
- Decomposing a pulsed optical parametric amplifier into independent squeezers
- Optimal Generation of Pulsed Entangled Photon Pairs
Cited by in corpus (17)
- Tailored photon-pair generation in optical fibers
- Fiber-assisted single-photon spectrograph
- Conditional preparation of single photons using parametric downconversion: A recipe for purity
- Joint Temporal Density Measurements for Two-Photon State Characterization
- Coherence measures for heralded single-photon sources
- Characterization of Spectral Entanglement of Spontaneous Parametric-Down Conversion Biphotons
- Broadening the bandwidth of entangled photons: a step towards the generation of extremely short biphotons
- Pure single photon generation by type-I PDC with backward-wave amplification
- Efficient spatially-resolved multimode quantum memory
- Modelling and optimization of photon pair sources based on spontaneous parametric down-conversion
- Nonlocal Modulation of Entangled Photons
- Spatiotemporal correlations in entangled photons generated by spontaneous parametric down conversion
- Characterizing heralded single-photon sources with imperfect measurement devices
- Indistinguishability of independent single photons
- Control, measurement and propagation of entanglement in photon pairs generated through type-II parametric downconversion
- Increased pump acceptance bandwidth in spontaneous parametric downconversion process using Bragg reflection waveguides
- Density matrix of a single photon produced in parametric down conversion derived