Article
Nanoscience & Nanotechnology
Jin-Woo Chae, Jin-Hun Kim, Youn-Chang Jeong, Yoon-Ho Kim
Summary: In this work, a tunable up-conversion single-photon detector module that covers the complete telecom C band is reported, making it suitable for quantum communication networks based on sharing wavelength-multiplexed entangled photons.
Article
Quantum Science & Technology
Beatrice Da Lio, Carlos Faurby, Xiaoyan Zhou, Ming Lai Chan, Ravitej Uppu, Henri Thyrrestrup, Sven Scholz, Andreas D. Wieck, Arne Ludwig, Peter Lodahl, Leonardo Midolo
Summary: This article presents a quantum frequency conversion scheme for converting single photons emitted by quantum dots to the telecommunication C band. The conversion achieves high end-to-end efficiency, purity, and indistinguishability.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Optics
Xiang You, Ming-Yang Zheng, Si Chen, Run-Ze Liu, Jian Qin, Mo-Chi Xu, Zheng-Xuan Ge, Tung-Hsun Chung, Yu-Kun Qiao, Yang-Fan Jiang, Han-Sen Zhong, Ming-Cheng Chen, Hui Wang, Yu-Ming He, Xiu-Ping Xie, Hao Li, Li-Xing You, Christian Schneider, Juan Yin, Teng-Yun Chen, Mohamed Benyoucef, Yong-Heng Huo, Sven Hoefling, Qiang Zhang, Chao-Yang Lu, Jian-Wei Pan
Summary: This study reports quantum interference between two single photons from independent semiconductor quantum dots (QDs) separated by a 302 km optical fiber, representing a key step towards long-distance solid-state quantum networks.
ADVANCED PHOTONICS
(2022)
Article
Physics, Applied
Rintaro Fujimoto, Shoichi Murakami, Toshiki Kobayashi, Rikizo Ikuta, Shigehito Miki, Shigeyuki Miyajima, Masahiro Yabuno, Fumihiro China, Hirotaka Terai, Nobuyuki Imoto, Takashi Yamamoto
Summary: In this study, we demonstrated the coincidence measurement of quantum light using superconducting nanowire single-photon detectors with a single-flux-quantum (SFQ) circuit as a signal processing circuit. Through quantum state tomography of a polarization-entangled photon pair, the evaluation of the detection system based on the SFQ coincidence circuit showed an estimated fidelity almost equivalent to that obtained with a detection system based on a conventional time-to-digital converter.
APPLIED PHYSICS EXPRESS
(2021)
Article
Physics, Multidisciplinary
Guo-An Yan, Hua Lu
Summary: This paper proposes an efficient quantum router design based on breaking time-reversal symmetry in waveguide-cavity systems, which can achieve quantum routing functions with multiple output ports and an information conversion rate close to 100%. By adjusting the phase difference, the quantum routing function can be optimized and expanded to any number of outputs.
Article
Multidisciplinary Sciences
L. M. Arevalo Aguilar
Summary: In 1927, Einstein conducted a thought experiment at the Solvay conference to demonstrate the incompleteness of quantum mechanics. By using the Stern-Gerlach experiment, he showed that single-particle entanglement can produce nonlocal effects, opening up the possibility of implementing truly nonlocal tasks.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Dan Dalacu, Philip J. Poole, Robin L. Williams
Summary: The geometry of nanowires plays a crucial role in determining the rate of photon generation and efficiency of photon collection in non-classical light sources. By embedding quantum dots in nanowires with tailored geometries, high efficiency single photon generation with minimal multi-photon emissions can be achieved.
Article
Quantum Science & Technology
Wei Li, Le Wang, Shengmei Zhao
Summary: In this paper, we propose an extended SEPM-QKD protocol with the help of delocalized state measurement. The proposed scheme improves the key rate and extends the communication distance.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Quantum Science & Technology
Davide Bacco, Ilaria Vagniluca, Daniele Cozzolino, Soren M. M. Friis, Lasse Hogstedt, Andrea Giudice, Davide Calonico, Francesco Saverio Cataliotti, Karsten Rottwitt, Alessandro Zavatta
Summary: Despite the potential crucial impact of Quantum Key Distribution (QKD) in the next decades, challenges such as the co-propagation of quantum signals and high-speed data traffic within the same optical fiber still exist. To address these challenges, a new method based on up-conversion assisted receiver has been proposed, showing higher tolerance for noise and enabling the distribution of secret keys under conditions of 4 dB-higher classical power.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Physics, Multidisciplinary
Kang Liu, Jing Yang, Xin-Lei Li, Ji-Yang Li, Guo-An Yan
Summary: The theoretical study focused on the influence of phase difference of coupling strength changes on the transport of a single-photon in coupled-resonator waveguides. Results showed that phase difference not only improves the conversion efficiency of single-photon transport in CRWs, but also adjusts the irregular energy band spectrum to become regular. This parameter could be crucial for experimental realization of quantum solid-state devices such as quantum switches and quantum routers.
CHINESE JOURNAL OF PHYSICS
(2021)
Article
Quantum Science & Technology
Guo-An Yan, Dong-shan He, Hua Lu
Summary: This study theoretically investigates the single-photon scattering properties in a one-dimensional waveguide coupled to a cavity and a two-level atom. Two cases are considered: when the waveguide is coupled to the cavity-emitter and when it is coupled to both a cavity and a two-level atom. In our system, the phase of the emitter-cavity-waveguide coupling strength acts as a sensitive controller, allowing for control of perfect transmission, perfect reflection, and adjustment of transmission spectrum.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Multidisciplinary Sciences
Xianjing Zhou, Gerwin Koolstra, Xufeng Zhang, Ge Yang, Xu Han, Brennan Dizdar, Xinhao Li, Ralu Divan, Wei Guo, Kater W. Murch, David I. Schuster, Dafei Jin
Summary: This study presents an experimental realization of a qubit platform based on isolated single electrons trapped on an ultraclean solid neon surface. By integrating an electron trap in a circuit quantum electrodynamics architecture, strong coupling between a single electron and a single microwave photon is achieved. The results indicate that the electron-on-solid-neon qubit performs near the state of the art for a charge qubit.
Article
Optics
John Hannegan, James D. Siverns, Qudsia Quraishi
Summary: This research demonstrates entanglement between matter and photons in quantum networks, interaction and conversion at different wavelengths, and a decrease in fidelity due to reduced signal-to-noise ratio of detectors.
Article
Quantum Science & Technology
Chuang Li, Ying Dong, Jiandong Zhang, Yan Xia, Jie Song, Weiqiang Ding
Summary: In this study, a simple and novel scheme to generate a NOON state for trapped atoms in two separate cavities using single-photon detection is proposed. The fidelity of the NOON state is observed to decrease in the presence of dissipation, but an effective protocol is suggested to improve the fidelity and achieve a high-fidelity many-atom NOON state. The proposed scheme is feasible with current technology.
QUANTUM INFORMATION PROCESSING
(2021)
Review
Optics
Stefano Dello Russo, Arianna Elefante, Daniele Dequal, Deborah Katia Pallotti, Luigi Santamaria Amato, Fabrizio Sgobba, Mario Siciliani de Cumis
Summary: This review reports on the current state of the art of single-photon detectors operating in the mid-infrared wavelength range and discusses the technological challenge of transitioning from near-infrared detectors to mid-infrared detection. Different approaches are explored, and the three most promising solutions are described in detail.
Review
Physics, Multidisciplinary
Sebastian Mizera
Summary: This article discusses the mathematical properties and physical implications of scattering amplitudes, and traces these properties back to physics through simple scattering problems.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2024)