Universal Quantum Computation by a Single Photon

Xiaoqin Gao Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria; Vienna Center for Quantum Science & Technology (VCQ), Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria; National Mobile Communications Research Laboratory, Quantum Information Research Center, Southeast University, Sipailou 2, 210096 Nanjing, China Zhengwei Liu YMSC and Department of Mathematics, Tsinghua University, Beijing 100084, China

TBD mathscidoc:2207.43009

We use one photon to simulate an n-qubit quantum system for the first time. We propose a new scheme to realize universal quantum computation in polynomial time O(n^5). A generating set of gates can be realized with high accuracy in the lab. We conclude that photonic quantum computation is one of the promising approaches to universal quantum computation.
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  title={Universal Quantum Computation by a Single Photon},
  author={Xiaoqin Gao, and Zhengwei Liu},
Xiaoqin Gao, and Zhengwei Liu. Universal Quantum Computation by a Single Photon. 2019. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220707160945502636580.
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