Experimental realization of on-chip few-photon control around exceptional points

Pengtao Song, Xinhui Ruan, Haijin Ding, Shengyong Li, Ming Chen, Ran Huang, Le-Man Kuang, Qianchuan Zhao, Jaw-Shen Tsai, Hui Jing, Lan Yang, Franco Nori, Dongning Zheng (), Yu-xi Liu, Jing Zhang () and Zhihui Peng ()
Additional contact information
Pengtao Song: Hunan Normal University
Xinhui Ruan: Hunan Normal University
Haijin Ding: Tsinghua University
Shengyong Li: Tsinghua University
Ming Chen: Hunan Normal University
Ran Huang: Hunan Normal University
Le-Man Kuang: Hunan Normal University
Qianchuan Zhao: Tsinghua University
Jaw-Shen Tsai: RIKEN
Hui Jing: Hunan Normal University
Lan Yang: Washington University
Franco Nori: RIKEN
Dongning Zheng: Chinese Academy of Sciences
Yu-xi Liu: Tsinghua University
Jing Zhang: Xi’an Jiaotong University
Zhihui Peng: Hunan Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract Non-Hermitian physical systems have attracted considerable attention in recent years for their unique properties around exceptional points (EPs), where the eigenvalues and eigenstates of the system coalesce. Phase transitions near exceptional points can lead to various interesting phenomena, such as unidirectional wave transmission. However, most of those studies are in the classical regime and whether these properties can be maintained in the quantum regime is still a subject of ongoing studies. Using a non-Hermitian on-chip superconducting quantum circuit, here we observe a phase transition and the corresponding exceptional point between the two phases. Furthermore, we demonstrate that unidirectional microwave transmission can be achieved even in the few-photon regime within the broken symmetry phase. This result holds some potential applications, such as on-chip few-photon microwave isolators. Our study reveals the possibility of exploring the fundamental physics and practical quantum devices with non-Hermitian systems based on superconducting quantum circuits.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-024-54199-w Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54199-w

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-024-54199-w

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().