Multi-dimensional photonic states from a quantum dot. (7th February 2018)

• Record Type: Journal Article
• Authors: Lee, J P; Bennett, A J; Stevenson, R M; Ellis, D J P; Farrer, I; Ritchie, D A; Shields, A J
• Is Part Of: Quantum science and technology. Volume 3:Number 2(2018)
• Publication Date: 2018-02-07
• Subjects: quantum dots -- Raman scattering -- quantum information -- quantum optics -- photonics -- cavity QED; Quantum theory -- Periodicals; Quantum theory; Periodicals; 530
• DOI: 10.1088/2058-9565/aaa7b7
• Languages: English
• ISSNs: 2058-9565

Abstract

Abstract: Quantum states superposed across multiple particles or degrees of freedom offer an advantage in the development of quantum technologies. Creating these states deterministically and with high efficiency is an ongoing challenge. A promising approach is the repeated excitation of multi-level quantum emitters, which have been shown to naturally generate light with quantum statistics. Here we describe how to create one class of higher dimensional quantum state, a so called W-state, which is superposed across multiple time bins. We do this by repeated Raman scattering of photons from a charged quantum dot in a pillar microcavity. We show this method can be scaled to larger dimensions with no reduction in coherence or single-photon character. We explain how to extend this work to enable the deterministic creation of arbitrary time-bin encoded qudits.