A Parallel Beam Splitting Based on Gradient Metasurface: Preparation and
Fusion of Quantum Entanglement
- URL: http://arxiv.org/abs/2403.08233v1
- Date: Wed, 13 Mar 2024 04:24:26 GMT
- Title: A Parallel Beam Splitting Based on Gradient Metasurface: Preparation and
Fusion of Quantum Entanglement
- Authors: Qi Liu, Xuan Liu, Yu Tian, Zhaohua Tian, Guixin Li, Xi-Feng Ren,
Qihuang Gong, and Ying Gu
- Abstract summary: Gradient metasurface is widely used in polarized beam splitting (BS) in the classical and quantum optics.
We demonstrate that the single metasurface can function as sequentially linked beamsplitters, enabling the parallelization of a series of BS processes.
The principle of parallel BS through the metasurface opens up a versatile way to manipulate the quantum state at the micro/nano scale.
- Score: 9.052355916409141
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: Gradient metasurface, formed by a set of subwavelength unit cells with
different phase modulation, is widely used in polarized beam splitting (BS) in
the classical and quantum optics. Specifically, its phase gradient allows the
path and polarization of multiple output lights to be locked by corresponding
inputs.Using this unique path-polarization locked property, we demonstrate that
the single metasurface can function as sequentially linked beamsplitters,
enabling the parallelization of a series of BS processes. Such a parallel BS
metasurface provides a multi-beam interference capability for both classical
and quantum light manipulation. Taking this advantage, we first prepare path
and polarization hybrid entangled states of two, three, and multi photons from
unentangled photon sources. Then, the ability of parallel BS-facilitated
entanglement is applied to demonstrate entanglement fusion among entangled
photon pairs, which can greatly enlarge the entanglement dimension. The
principle of parallel BS through the metasurface opens up a versatile way to
manipulate the quantum state at the micro/nano scale, which will have potential
applications in on-chip quantum optics and quantum information processing.
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