1. Experimental realization of sequential weak measurements of non-commuting Pauli observables
- Author
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Meng-Jun Hu, Bi-Heng Liu, Jiang-Shan Chen, Can-Guang Guo, Yong-Sheng Zhang, Chuan-Feng Li, Yun-Feng Huang, and Xiao-Min Hu
- Subjects
Physics ,Quantum Physics ,Photon ,business.industry ,Quantum measurement ,FOS: Physical sciences ,Observable ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Quantum information processing ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,010309 optics ,symbols.namesake ,Optics ,Pauli exclusion principle ,Quantum mechanics ,0103 physical sciences ,Photon polarization ,symbols ,Weak measurement ,0210 nano-technology ,business ,Quantum Physics (quant-ph) ,Realization (systems) - Abstract
Sequential weak measurements of non-commuting observables is not only fundamentally interesting in quantum measurement but also shown potential in various applications. The previous reported methods, however, can only realize limited sequential weak measurements experimentally. In this Letter, we propose the realization of sequential measurements of arbitrary observables and experimentally demonstrate for the first time the measurement of sequential weak values of three non-commuting Pauli observables by using genuine single photons. The results presented here will not only improve our understanding of quantum measurement, e.g. testing quantum contextuality, macroscopic realism, and uncertainty relation, but also have many applications such as realizing counterfactual computation, direct process tomography, direct measurement of the density matrix and unbounded randomness certification., Comment: Comments are welcome!
- Published
- 2019