Truly unentangled photon pairs without spectral filtering

Vernon, Z.; Menotti, M.; Tison, Christopher C.; Steidle, Jeffrey A.; Fanto, Michael L.; Thomas, Paul M.; Preble, Stefan F.; Smith, A. Matthew; Alsing, Paul M.; Liscidini, Marco; Sipe, J. E.

doi:10.1364/ol.42.003638

Cited by 98 publications

(76 citation statements)

References 23 publications

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“…Using cavity modes with different coupling rates for the idler, pump, and signal has been shown to enable signal-idler states with joint spectral amplitudes that are almost completely separable (implying high purity signal states) [32,33]. The main challenges for creating indistinguishable photons with our proposed architecture is stabilization of the high Q resonance and repeatability of the output filter opening.…”

Section: Discussionmentioning

confidence: 99%

Temporally and spectrally multiplexed single photon source using quantum feedback control for scalable photonic quantum technologies

2018

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Current proposals for scalable photonic quantum technologies require on-demand sources of indistinguishable single photons with very high efficiency. Even with recent progress in the field there is still a significant gap between the requirements and state of the art performance. Here, we propose an on-chip source of time-multiplexed, heralded photons. Using quantum feedback control on a photon storage cavity with an optimized driving protocol, we estimate an on-demand efficiency of 99% and unheralded loss of order 1%, assuming high efficiency detectors and intrinsic cavity quality factors of order 10 8 . We further explain how temporal-and spectral-multiplexing can be used in parallel to significantly reduce device requirements if single photon frequency conversion is possible with efficiency in the same range of 99%.

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Section: Discussionmentioning

confidence: 99%

Temporally and spectrally multiplexed single photon source using quantum feedback control for scalable photonic quantum technologies

2018

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“…However, the filtering process will cause extra loss. Another solution is the engineering of the joint spectra intensity with microring resonators, such as the recently proposed experimental work and theoretical protocols . A high heralding efficiency is critical for scaling photon numbers due to the exponential increase in losses with number of photons.…”

Section: Photon‐pair Sourcementioning

confidence: 99%

Progress on Integrated Quantum Photonic Sources with Silicon

2019

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The high stability and scalability of integrated circuits make them a reliable and practical platform for photonic quantum information processing. In various platforms for quantum photonic integrated circuits, the silicon‐on‐insulator technology, with its strong nonlinear effect and mature fabrication technology, has gradually emerged in the preparation of quantum photonic sources. This report presents a review of this series of research advances in the preparation of a quantum photonic source, based on the spontaneously four‐wave mixing process in a silicon waveguide, especially chip‐scale entangled states that have been realized in recent years.

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“…An important advantage of our proposed design is its ability to produce photons with very high spectral purity. It has been shown that the spectral purity of photons emitted from a resonator where idler, pump, and signal modes are identical is limited to 92% even for a flat pump spectrum [17,28]. In [17] it was shown that using interferometric coupling to increase the linewidth of the pump relative to the signal and idler enables arbitrarily…”

Section: Spectral Correlations Of Generated Photon Pairsmentioning

confidence: 99%

Unidirectional frequency conversion in microring resonators for on-chip frequency-multiplexed single-photon sources

et al. 2019

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Microring resonators are attractive for low-power frequency conversion via Bragg-scattering fourwave-mixing due to their comb-like resonance spectrum, which allows resonant enhancement of all four waves while maintaining energy and momentum conservation. However, the symmetry of such mode structures limits the conversion efficiency to 50% due to the equal probability of up-and downconversion. Here, we demonstrate how two coupled microrings enable highly directional conversion between the spectral modes of one of the rings. An extinction between up-and down-conversion of more than 40 dB is experimentally observed. Based on this method, we propose a design for on-chip multiplexed single-photon sources that probabilistically generate photon pairs across many frequency modes of a ring resonator and subsequently convert them to a single frequency-thereby enabling quasi-deterministic photon emission. Our numerical analysis shows that once a photon is generated, it can be converted and emitted into a wave packet having a 90% overlap with a Gaussian with 99% efficiency for a ratio between intrinsic and coupling quality factors of 400.

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Truly unentangled photon pairs without spectral filtering

Cited by 98 publications

References 23 publications

Temporally and spectrally multiplexed single photon source using quantum feedback control for scalable photonic quantum technologies

Temporally and spectrally multiplexed single photon source using quantum feedback control for scalable photonic quantum technologies

Progress on Integrated Quantum Photonic Sources with Silicon

Unidirectional frequency conversion in microring resonators for on-chip frequency-multiplexed single-photon sources

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