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A solid state source of photon triplets based on quantum dot molecules

Khoshnegar, Milad, Huber, Tobias, Predojević, Ana, Dalacu, Dan, Prilmüller, Maximilian, Lapointe, Jean, Wu, Xiaohua, Tamarat, Philippe, Lounis, Brahim, Poole, Philip, Weihs, Gregor, Majedi, Hamed·2017·Nature Communications
DOI 10.1038/ncomms15716PMC PMC5472777
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Abstract

Producing advanced quantum states of light is a priority in quantum information technologies. In this context, experimental realizations of multipartite photon states would enable improved tests of the foundations of quantum mechanics as well as implementations of complex quantum optical networks and protocols. It is favourable to directly generate these states using solid state systems, for simpler handling and the promise of reversible transfer of quantum information between stationary and flying qubits. Here we use the ground states of two optically active coupled quantum dots to directly produce photon triplets. The formation of a triexciton in these ground states leads to a triple cascade recombination and sequential emission of three photons with strong correlations. We record 65.62 photon triplets per minute under continuous-wave pumping, surpassing rates of earlier reported sources. Our structure and data pave the way towards implementing multipartite photon entanglement and multi-qubit readout schemes in solid state devices.

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  • Probabilistic single-photon sources include parametric down-conversion in bulk crystals, semiconductors, microresonators and optical waveguides, and four-wave mixing in optical waveguides, few-mode fibers and microdisks.

    “Among probabilistic sources we mention (a) parametric down-conversion (PDC) in bulk crystals [204], semiconductors [166,215], microresonators [183, 185] and optical waveguides [32, 172-175, 177-182, 209, 210, 212-214] and (b) four-wave mixing (FWM) in optical waveguides [184,189,211], few-mode fibers [186] and microdisks [187].”

    From Photonic quantum information processing: a review (2019) · cites this paper as [215]

    The citation is attached to parametric down-conversion in semiconductors. The paper’s Abstract instead describes its semiconductor quantum-dot molecule as producing photon triplets by triple cascade recombination, and contrasts that approach with SPDC-based schemes. It does not present the quantum-dot molecule as a parametric down-conversion source. (LLM, conf=0.88)

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Citations

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Research works printed but not linked: 39

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Metadata

Authors
Khoshnegar, M., Huber, T., Predojević, A., Dalacu, D., Prilmüller, M., Lapointe, J., Wu, X., Tamarat, P., Lounis, B., Poole, P., Weihs, G., & Majedi, H.
Venue
Nature Communications
Publisher
Springer Science and Business Media LLC
Published
2017-06-12
Volume
8
Issue
1
ISSN
2041-1723
DOI
10.1038/ncomms15716
PMC
PMC5472777
Cited by
52
References
6
Language
en
Licence

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