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arXiv:2204.10522cond-mat.mes-hall

Coherent interaction of a-few-electron quantum dot with a terahertz optical resonator

Kazuyuki Kuroyama, Jinkwan Kwoen, Yasuhiko Arakawa, Kazuhiko Hirakawa

Early discovery. Linked by one identifiable commenter. This paper is outside the main ranking; a mention is not an endorsement.

Abstract

We have investigated light-matter hybrid excitations in a quantum dot (QD)-terahertz (THz) optical resonator coupled system. We fabricate a gate-defined QD in the vicinity of a THz split-ring resonator (SRR) by using a AlGaAs/GaAs two-dimensional electron system (2DES). By illuminating the system with THz radiation, the QD shows a current change whose spectrum exhibits coherent coupling between the electrons in the QD and the SRR as well as coupling between the 2DES and the SRR. The latter coupling enters the ultrastrong coupling regime and the coupling between the QD and the SRR is also very close to the ultrastrong coupling regime, despite the fact that only a few electrons reside in the QD.

arXiv comments
Journal reference
DOI
doi:10.1103/PhysRevLett.132.066901
Subjects
cond-mat.mes-hallMesoscale and Nanoscale Physics quant-phQuantum Physics

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Linked by 1 identifiable commenter in 6 comments across 6 threads, from Feb 2024 to May 2025. Found in 1 HN submission from Feb 2024 to Feb 2024. Open submission discussions.

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Discussed in comments6 threads

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    • "Researchers solve a foundational problem in transmitting quantum information" (2024) https://phys.org/news/2024-02-foundational-problem-transmitt... : > They developed a new technology for transmitting quantum information over perhaps tens to a hundred micrometers [...,] "In…

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