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On-chip coherent conversion of photonic quantum entanglement between different degrees of freedom.

ABSTRACT: In the quantum world, a single particle can have various degrees of freedom to encode quantum information. Controlling multiple degrees of freedom simultaneously is necessary to describe a particle fully and, therefore, to use it more efficiently. Here we introduce the transverse waveguide-mode degree of freedom to quantum photonic integrated circuits, and demonstrate the coherent conversion of a photonic quantum state between path, polarization and transverse waveguide-mode degrees of freedom on a single chip. The preservation of quantum coherence in these conversion processes is proven by single-photon and two-photon quantum interference using a fibre beam splitter or on-chip beam splitters. These results provide us with the ability to control and convert multiple degrees of freedom of photons for quantum photonic integrated circuit-based quantum information process.

SUBMITTER: Feng LT

PROVIDER: S-EPMC4915126 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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On-chip coherent conversion of photonic quantum entanglement between different degrees of freedom.

Feng Lan-Tian LT Zhang Ming M Zhou Zhi-Yuan ZY Li Ming M Xiong Xiao X Yu Le L Shi Bao-Sen BS Guo Guo-Ping GP Dai Dao-Xin DX Ren Xi-Feng XF Guo Guang-Can GC

Nature communications 20160620

In the quantum world, a single particle can have various degrees of freedom to encode quantum information. Controlling multiple degrees of freedom simultaneously is necessary to describe a particle fully and, therefore, to use it more efficiently. Here we introduce the transverse waveguide-mode degree of freedom to quantum photonic integrated circuits, and demonstrate the coherent conversion of a photonic quantum state between path, polarization and transverse waveguide-mode degrees of freedom o ...[more]

PMID: 27321821

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