Realization of a device-independent delayed-choice experiment using single photons

POSTER

Abstract

Wave-particle duality is one of the most intriguing features in quantum physics. A well-known gedanken experiment that provides evidence for this is the Wheeler's delayed-choice experiment based on a Mach-Zehnder interferometer. Many different versions of delayed-choice experiments have been conducted with both classical and quantum detecting devices. A recent proposal suggests that the delayed-choice experiment can be considered in the perspective of device-independent causal model. In this experiment, we realize this modified version with a deterministic single-photon source. Through our results, we can examine that any two-dimensional nonretrocausal classical model can be excluded in a device-independent manner based on the violation of dimension witness inequality. Our experiment also exhibits the benefits of studying quantum theory from the perspective of casual model.

*This work is supported by the National Key Research and Development Program of China, the National Natural Science Foundation of China, and the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences.

Authors

  • Shang Yu

    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China

  • Yong-Nan Sun

    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China

  • Wei Liu

    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China

  • Zhao-Di Liu

    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China

  • Zhi-Jin Ke

    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China

  • Yi-Tao Wang

    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China

  • Jian-Shun Tang

    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China

  • Chuan-Feng Li

    • University of Science and Technology of China
    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China

  • Guang-Can Guo

    • University of Science and Technology of China
    • CAS Key Laboratory of Quantum Information, University of Science and Technology of China