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arXiv · 2402.12568

Realisation of a Coherent and Efficient One-Dimensional Atom

Natasha Tomm·Nadia O. Antoniadis·Marcelo Janovitch·Matteo Brunelli·Rüdiger Schott·Sascha R. Valentin·Andreas D. Wieck·Arne Ludwig·Patrick Potts·Alisa Javadi·Richard J. Warburton
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Abstract

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 ($\beta$-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 $\beta$ to be adjusted and gives control over the photon statistics -- from strong bunching to anti-bunching -- 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.

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Natasha Tomm, Nadia O. Antoniadis, Marcelo Janovitch, Matteo Brunelli, Rüdiger Schott, Sascha R. Valentin, Andreas D. Wieck, Arne Ludwig, Patrick Potts, Alisa Javadi, Richard J. Warburton. 2024-02-19. Realisation of a Coherent and Efficient One-Dimensional Atom. https://doi.org/10.1103/physrevlett.133.083602

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