Realization of a Coherent and Efficient One-Dimensional Atom

A quantum emitter interacting with photons in a single optical-mode constitutes a one-dimensional atom. A coherent and efficiently coupled one-dimensional atom provides a large nonlinearity, enabling photonic quantum gates. Achieving a high coupling efficiency (β factor) and low dephasing is challen...

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Veröffentlicht in:Physical review letters 2024-08, Vol.133 (8), p.083602, Article 083602
Hauptverfasser: Tomm, Natasha, Antoniadis, Nadia O, Janovitch, Marcelo, Brunelli, Matteo, Schott, Rüdiger, Valentin, Sascha R, Wieck, Andreas D, Ludwig, Arne, Potts, Patrick P, Javadi, Alisa, Warburton, Richard J
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Sprache:eng
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Zusammenfassung:A quantum emitter interacting with photons in a single optical-mode constitutes a one-dimensional atom. A coherent and efficiently coupled one-dimensional atom provides a large nonlinearity, enabling photonic quantum gates. Achieving a high coupling efficiency (β factor) and low dephasing is challenging. Here, we use a semiconductor quantum dot in an open microcavity as an implementation of a one-dimensional atom. With a weak laser input, we achieve an extinction of 99.2% in transmission and a concomitant bunching in the photon statistics of g^{(2)}(0)=587, showcasing the reflection of the single-photon component and the transmission of the multi-photon components of the coherent input. The tunable nature of the microcavity allows β to be adjusted and gives control over the photon statistics-from strong bunching to antibunching-and the phase of the transmitted photons. We obtain excellent agreement between experiment and theory by going beyond the single-mode Jaynes-Cummings model. Our results pave the way towards the creation of exotic photonic states and two-photon phase gates.
ISSN:0031-9007
1079-7114
1079-7114
DOI:10.1103/PhysRevLett.133.083602