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This study demonstrates stable qubit-cavity coupling using structured light within semiconductor micropillars, enabling spin-locked chiral orbital angular momentum for single-photon emissions. The achievement represents a significant step in controlling spatially varied polarizations at the quantum level to engineer specific entanglement properties essential for photonic quantum networks.

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Sun Yat-sen University Achieves Stable Qubit-Cavity Coupling

Quantum ZeitgeistAugust 3, 20264 min read

Researchers at Sun Yat-sen University, Guangzhou 510275, China, achieved stable qubit-cavity coupling, as detailed in a study involving the State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics. Shunfa Liu, Jiantao Ma, Yangpeng Wang, Xueshi Li, and Xuehua Wang are among the authors affiliated with Sun Yat-sen University contributing to this work.

Researchers at Sun Yat-sen University, Chinese Academy of Sciences, School of Precision Instrument and Optoelectronic Engineering and Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area, have achieved stable qubit-cavity coupling using structured light. The work demonstrates a system where single photons interact with a single epitaxial quantum dot (QD) within a semiconductor cavity, constructing four distinct structured cavity modes within a micropillar cavity consisting of 30/20 pairs of distributed Bragg reflectors. Shunfa Liu and Jiantao…

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