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Information enters the brain through encoding, which is the input of information into the memory system. Once sensory information is received from the environment, the brain labels or codes it. The information is then organized with similar information and connected to existing concepts. Encoding occurs through automatic processing and effortful processing.
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High-dimensional encoding based on classical nonseparability.

Pengyun Li, Bo Wang, Xiangdong Zhang

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    This study introduces a novel multi-ary encoding protocol using hybrid vector beams. This method enhances optical communication by encoding more information through classical nonseparability of orbital angular momentum and polarization.

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    Area of Science:

    • Optics and Photonics
    • Quantum Information Science
    • Optical Communication

    Background:

    • Classical nonseparability and quantum entanglement share formal analogies.
    • Hybrid vector beams possess unique properties combining orbital angular momentum (OAM) and polarization.
    • Existing optical communication methods face limitations in information encoding capacity.

    Purpose of the Study:

    • To develop a multi-ary encoding protocol for optical communication.
    • To leverage the nonseparability of OAM and polarization in hybrid vector beams.
    • To achieve high-dimensional encoding for increased information capacity.

    Main Methods:

    • Utilizing the formal analogy between classical nonseparability and quantum entanglement.
    • Implementing a multi-ary encoding protocol based on the nonseparability of OAM and polarization.
    • Transforming OAM states of vector beams with polarization assistance for high-dimensional encoding.
    • Manipulating N/2 distinct OAM modes to achieve N-ary encoding.

    Main Results:

    • Demonstrated high-dimensional encoding in a hybrid vector beam system.
    • Achieved N-ary encoding equivalent to log2N bits of information per N-dimensional non-separable basis.
    • Successfully decoded vector beams with minimal cross-talk.
    • Showcased significantly higher information encoding capacity compared to scalar beam OAM mode transformation.

    Conclusions:

    • The proposed encoding scheme offers a substantial increase in information capacity for optical communication.
    • Exploiting classical nonseparability in vector beams provides a powerful tool for advanced optical communication.
    • This approach is highly beneficial for the future development of high-capacity optical networks.