Single-photon non-linear optics with a quantum dot in a waveguide

Title
Single-photon non-linear optics with a quantum dot in a waveguide
Authors
A. JavadiI. So¨llnerM. ArcariS. Lindskov HansenL. MidoloS. MahmoodianG. Kirsˇansk .eT. PregnolatoE.H. Lee송진동S. StobbeP. Lodahl
Keywords
Single-photon; quantum dot; waveguide
Issue Date
2015-10
Publisher
Nature Communications
Citation
VOL 6, 8655
Abstract
Strong non-linear interactions between photons enable logic operations for both classical and quantum-information technology. Unfortunately, non-linear interactions are usually feeble and therefore all-optical logic gates tend to be inefficient. A quantum emitter deterministically coupled to a propagating mode fundamentally changes the situation, since each photon inevitably interacts with the emitter, and highly correlated many-photon states may be created. Here we show that a single quantum dot in a photonic-crystal waveguide can be used as a giant non-linearity sensitive at the single-photon level. The non-linear response is revealed from the intensity and quantum statistics of the scattered photons, and contains contributions from an entangled photon–photon bound state. The quantum non-linearity will find immediate applications for deterministic Bell-state measurements and single-photon transistors and paves the way to scalable waveguide-based photonic quantum-computing architectures.
URI
http://pubs.kist.re.kr/handle/201004/51129
ISSN
20411723
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KIST Publication > Article
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