Dr. Lingjie Yu and Ph.D. candidates Dongning Liu, Jingyuan Zheng published a paper about on-chip generation and dynamic manipulation of polarization entangled Bell states on the first issue of Chip
Quantum entanglement is an important resource for quantum information. Polarization entangled Bell states are the most widely used entangled biphoton states in quantum optics experiments. Simple and reliable quantum light sources for polarization entangled Bell state generation are desired, especially at telecom-band for quantum communications over optical fibers.
In this work, frequency-degenerate biphoton states were generated in four silicon waveguides by spontaneous four-wave mixing. They were transformed to polarization entangled Bell states through on-chip quantum interference and quantum superposition, and then coupled to optical fibers. The chip can output two Bell states, which were demonstrated by the experiments of simplified Bell state measurement. It is shown that the chip supported a quantum state modulation rate of several tens of kHz. This function could be used as quantum information encoding based on the Bell states, which has important applications in quantum communications and quantum information processing.
This work has been accepted by the first issue of Chip (Volume 1, Issue 1, 100001; https://www.sciencedirect.com/science/article/pii/S2709472321000010;
DOI: 10.1016/j.chip.2021.100001) and online published on 16th Feb. 2022. The co-first author of this paper are Dr. Lingjie yu, Ph.D. candidate Dongning Liu and Jingyuan Zheng. The corresponding author of this paper is Prof. Wei Zhang.
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Dr. Yun Zhang, Research Fellow of Cancer Hospital of Chinese Academy of Medical Sciences, visited our lab. 2023-03-10
Ph.D. candidate Jingyuan Zheng's work was published on Photonics Research2023-03-01
Kejian Lv, general manager of China Merchants Venture Capital, visited my laboratory2023-02-19
Prof. Yidong Huang led the team to visit Tianjin H-Chip Technology Group2023-02-10
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Shan Zhang, Jinyu Li, and Hongbo Zhu successfully completed their doctoral dissertation defenses 2022-12-13
The 5th anniversary celebration of H-Chip Technology Group2022-11-16
Dr. ShikangLi's work about “Programmable Unitary Operations for Orbital Angular Momentum Encoded States” was published on National Science Open2022-11-14
Our Lab. assisted in the organization of the seminar on interdisciplinary researches between electronics and architecture2022-11-07
The students of Qian Xuesen's Mechanics Class visited our laboratory2022-10-14
The official WeChat of Tsinghua University reported the research achievements of our laboratory - "Use the chip as the "eye" and unlock the material code!"2022-10-12
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Prof. Yidong Huang participated in writing the textbook "Introduction of Electronic Information Science and Technology" and won the "Zhang Yujin Book Award of the Department of Electronics".2022-09-18