清华大学电子工程系微纳光电子学实验室欢迎您! 中文
返回

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.

图片1.png

2022年04月22日

News

Congratulations to Prof. Kaiyu Cui on becoming a Bingkun Zhou Scholar of the Department of Electronic Engineering, Tsinghua University2022-07-07

Warmly congratulate the 4 students on receiving their doctor's/master's degrees2022-06-28

Professor Yidong Huang and Ph. D students gave talks in the Conference on Laser and Electro-Optics 2022 (CLEO2022) 2022-05-22

Study on “Ultraspectral Imaging Based on Metasurfaces with Freeform Shaped Meta-Atoms” was published in Laser & Photonics Reviews2022-05-21

Di Qu, PhD graduate of our lab in 2012, was interviewed by Tianjin Daily -- Tianjin people's innovation and entrepreneurship in the past decade 2022-05-20

H-Chip Tech Group completed the second phase of donation and established professional scholarships2022-05-17

H-Chip Tech Group completed B round financing of nearly RMB 100 million2022-05-12

Prof. Fang Liu delivered an invited speech on ACS Photonics in China online summit2022-05-10

The laboratory achievement transformation enterprise "Optical Function Technology" was established2022-04-27

Study on “ultraspectral imaging chip with reconfigurable metasurfaces” published in Optica, the flagship journal of the Optical Society of America2022-04-25

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 Chip2022-04-22

Prof. Yidong Huang visited The Beijing-Tianjin-Hebei National Technology Innovation Center2022-04-20

Prof. Yidong Huang led a team to Tsinghua Changgung Hospital to promote the application of spectral technology in the field of clinical diagnosis2022-04-07

Prof. Yidong Huang and Prof. Fang Liu Meet Feng Liu, Director of Shanxi Comprehensive Reform Demonstration Zone2022-03-24

Ph.D. candidate Rong Xue published a paper about MDI-QKD of frequency-nondegenerate photons on Physical Review Applied2022-02-18