Tunable coherent microwave beam splitter and combiner at the single-photon level
Artikel i vetenskaplig tidskrift, 2025
A beam splitter is a key component used to direct and combine light paths in various optical and microwave systems. It plays a crucial role in devices like interferometers, such as the Mach-Zehnder and Hong-Ou-Mandel setups, where it splits light into different paths for interference measurements. These measurements are vital for precise phase and coherence testing in both classical and quantum optical experiments. In this work, we present a nonlinear beam splitter and beam combiner utilizing a frequency-tunable superconducting artificial atom in a one-dimensional open waveguide. Probed with coherent states at the single-photon level (average photon number ⟨ N ⟩ ≪ 1 ), this device demonstrates highly tunable transparency, ranging from near unity to complete reflection. Additionally, the beam combiner can merge two coherent beams, generating interference fringes as the relative phase between them varies.
Beam splitter
Interferometry
Superconducting devices
Microwave frequencies
Superconducting quantum computing
Författare
Y. H. Huang
National Tsing Hua University
K. M. Hsieh
City University of Hong Kong
F. Aziz
National Tsing Hua University
Z. Q. Niu
Chinese Academy of Sciences
ShanghaiTech University
P. Y. Wen
National Chung Cheng University
Yu Ting Cheng
City University of Hong Kong
Y. S. Tsai
National Tsing Hua University
J. C. Chen
National Tsing Hua University
Xin Wang
City University of Hong Kong
Anton Frisk Kockum
Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik
Z. R. Lin
Chinese Academy of Sciences
Yen Hsiang Lin
National Tsing Hua University
Io Chun Hoi
City University of Hong Kong
National Tsing Hua University
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 127 1 014002Kvantsimulering och kvantkommunikation med stora atomer
Stiftelsen för Strategisk forskning (SSF) (FFL21-0279), 2022-08-01 -- 2027-12-31.
Open Superconducting Quantum Computers (OpenSuperQPlus)
Europeiska kommissionen (EU) (EC/HE/101113946), 2023-03-01 -- 2026-08-31.
Ämneskategorier (SSIF 2025)
Atom- och molekylfysik och optik
Den kondenserade materiens fysik
Annan fysik
DOI
10.1063/5.0272687