On-Demand Microwave Single-Photon Source Based on Tantalum Thin Film
Ying Hu, Sheng-Yong Li, En-Qi Chen, Jing Zhang, Yu-xi Liu, Jia-Gui Feng, Zhihui Peng
TL;DR
This paper presents a microwave single-photon source using tantalum thin film, demonstrating high-quality emission and improved detection techniques for quantum photonics applications.
Contribution
It introduces a tantalum-based superconducting device for microwave photon emission with enhanced stability and measurement efficiency.
Findings
High-quality, stable photon emission demonstrated.
Second-order correlation measurements confirm antibunching.
Improved detection with traveling-wave parametric amplifiers.
Abstract
Single-photon sources are crucial for quantum information technologies. Here, we demonstrate a microwave single-photon source fabricated using a tantalum-based thin film, whose favorable material properties enable high-quality and stable photon emission. The antibunching behavior of the emitted radiation is revealed by second-order correlation measurements. Furthermore, traveling-wave parametric amplifiers are used as the pre-amplifier in the detection chains, we substantially improve the signal-to-noise ratio and thereby greatly reduce the acquisition time required for second-order correlation measurements. These results demonstrate the viability of tantalum-based superconducting devices as reliable platforms for microwave quantum photonics.
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