期刊
PHYSICAL REVIEW LETTERS
卷 114, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.114.140502
关键词
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资金
- NSFC [11174052, 11474049]
- Open Fund from the State Key Laboratory of Precision Spectroscopy of East China Normal University
- National Fundamental Research Program [2011CB921203]
- China 1000 Talents program
- Alberta Innovates Technology Futures
We demonstrate a quantum walk with time-dependent coin bias. With this technique we realize an experimental single-photon one-dimensional quantum walk with a linearly ramped time-dependent coin flip operation and thereby demonstrate two periodic revivals of the walker distribution. In our beam-displacer interferometer, the walk corresponds to movement between discretely separated transverse modes of the field serving as lattice sites, and the time-dependent coin flip is effected by implementing a different angle between the optical axis of half-wave plate and the light propagation at each step. Each of the quantum-walk steps required to realize a revival comprises two sequential orthogonal coin-flip operators, with one coin having constant bias and the other coin having a time-dependent ramped coin bias, followed by a conditional translation of the walker.
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