Beijing Academy of Quantum Information Sciences

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Research Groups

Quantum Algorithm and Software Group

Quantum Computation
About

The Quantum Algorithm and Application Software(QAAS) Group stems from the group of Quantum Direct Communication and Quantum Algorithm Application Research in April 2021，lead by Gui-Lu Long who is a professor in Tsinghua University as well as a deputy-president of BAQIS. The group comprises eight full-time members.  Notable among their achievements, Prof. Long invented the Quantum Precise Search Algorithm, also known as Grover-Long Algorithm to the community. In addition, he proposed to perform quantum computation with linear combination of unitary operators (LCU),  which is one of the five fundamental techniques to design quantum algorithms. 

Group Leader: Gui-Lu Long


Since the development of the group, it has made several remarkable contributions in quantum algorithms, including the Full-quantum Eigensolver (FQE) and an improved quantum gradient descent algorithm.  The FQE can be implemented entirely on a quantum computer, with promising application to chemistry and atom simulation. The improved quantum gradient descent algorithm reduces the requirement of quantum circuit, enabling its performance on state-of-the-art quantum hardware. The group focuses on developing applied algorithms and softwares , such as quantum algorithms for quantum-chemistry simulation, atomic nuclear physics, quantum machine learning, quantum finance and logistics, traffic control, and cryptanalysis. In the future, utilizing quantum algorithms and softwares to solve practical problems on quantum computers would be one of the most urgent and applicable research fields among quantum computation.

Research Team

Publications

  1. Shijie Wei, Hang Li, GuiLu Long. "A full quantum eigensolver for quantum chemistry simulations." Research 2020 (2020).


2. Keren Li, Shijie Wei (Co first author), Pan Gao, Feihao Zhang, Zengrong Zhou, Tao Xin, Xiaoting Wang, Patrick Rebentrost, Guilu Long. "Optimizing a polynomial function on a quantum processor." npj Quantum Information 7.1 (2021).


3. Wei, ShiJie, Wei, Chao (Co first author), Lv, Peng and Shao, Changpeng , Gao, Pan , Zhou, Zengrong , Li, Keren and Xin, Tao, Long, GuiLu. A quantum algorithm for heat conduction with symmetrisation. Science Bulletin (2023).


4. Tao Xin, Shijie Wei(Co first author), Jianlian Cui, Junxiang Xiao, Inigo Arrazola, Lucas Lamata, Xiangyu Kong, Dawei Lu, Enrique Solano, Guilu Long. "Quantum algorithm for solving linear differential equations: Theory and experiment." Physical Review A 101.3 (2020).


5. Keren Li; Pan Gao ; A NISQ method to Simulate Hermitian Matrix Evolution, Entropy, 2022,24 (7)


6. Hengyan Wang , Shijie Wei (Co first author) , Chao Zheng , Xiangyu Kong, Jingwei Wen, Xinfang Nie, Jun Li, Dawei Lu, Tao Xin. "Experimental simulation of the four-dimensional Yang-Baxter equation on a spin quantum simulator." Physical Review A 102.1 (2020)


7. Jingwei Wen, Guoqing Qin, Chao Zheng, Shijie Wei, Xiangyu Kong, Tao Xin, Guilu Long. "Observation of information flow in the anti-symmetric system with nuclear spins." npj Quantum Information 6.1 (2020)