Direct observation of photon bound states using a single artificial atom

Tomm, Natasha; Mahmoodian, Sahand; Antoniadis, Nadia O.; Schott, Rüdiger; Valentin, Sascha R.; Wieck, Andreas D.; Ludwig, Arne; Javadi, Alisa; Warburton, Richard J.

doi:10.48550/arxiv.2205.03309

Cited by 1 publication

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“…The giant nonlinearity also provides a playground for the investigation of intriguing photon-photon interactions [149,154] such as the formation of the photon bound state [155][156][157] . Recently, the few-photon scattering matrix [158] and the two-photon interaction dynamics [159] [Fig.…”

Section: Single-photon Nonlinearitymentioning

confidence: 99%

“…Finally, combining the chirality and nonlinearity can enable the creation of linear combinations of N-photon bound states [157,160] , which points to a new prospect for novel quantum applications, such as photon sorting, photon-number-resolving detectors, and Bell measurements [145,161,162] . The quantum-dot induced photon-photon interaction may also lead to new opportunities for quantum simulations, for instance, by taking into account anharmonic vibrational effects [7] , and in quantum neural networks [163] , where the emitter can act as a nonlinear actuator.…”

Section: Single-photon Nonlinearitymentioning

confidence: 99%

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Epitaxial quantum dots: a semiconductor launchpad for photonic quantum technologies

2022

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Epitaxial quantum dots formed by III-V compound semiconductors are excellent sources of nonclassical photons, creating single photons and entangled multi-photon states on demand. Their semiconductor nature allows for a straightforward combination with mature integrated photonic technologies, leading to novel functional devices at the single-photon level. Integrating a quantum dot into a carefully engineered photonic cavity enables control of the radiative decay rate using the Purcell effect and the realization of photon-photon nonlinear gates. In this review, we introduce the basis of epitaxial quantum dots and discuss their applications as non-classical light sources. We highlight two interfaces-one between flying photons and the quantum-dot dipole, and the other between the photons and the spin. We summarize the recent development of integrated photonics and reconfigurable devices that have been combined with quantum dots or are suitable for hybrid integration. Finally, we provide an outlook of employing quantum-dot platforms for practical applications in large-scale quantum computation and the quantum Internet.

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