Wavelength conversion for single-photon polarization qubits through continuous variable quantum teleportation

• URL: http://arxiv.org/abs/2105.04737v1
• Date: Tue, 11 May 2021 01:13:07 GMT
• Title: Wavelength conversion for single-photon polarization qubits through continuous variable quantum teleportation
• Authors: Xi-Wang Luo, Chuanwei Zhang, Irina Novikova, Chen Qian, and Shengwang Du
• Abstract summary: A quantum internet connects remote quantum processors that need interact and exchange quantum signals over a long distance. Here we propose wavelength conversion devices for single-photon polarization qubits using continuous variable quantum teleportation. Our work paves the way for the realization of long-distance quantum networks.
• Score: 8.598192865991367
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A quantum internet connects remote quantum processors that need interact and exchange quantum signals over a long distance through photonic channels. However, these quantum nodes are usually composed of quantum systems with emitted photons unsuitable for long-distance transmission. Therefore, quantum wavelength conversion to telecom is crucial for long-distance quantum networks based on optical fiber. Here we propose wavelength conversion devices for single-photon polarization qubits using continuous variable quantum teleportation, which can efficiently convert qubits between near-infrared (780/795 nm suitable for interacting with atomic quantum nodes) and telecom wavelength (1300-1500 nm suitable for long-distance transmission). The teleportation uses entangled photon sources (i.e., non-degenerate two-mode squeezed state) that can be generated by four-wave mixing in rubidium atomic vapor cells, with a diamond configuration of atomic transitions. The entangled fields can be emitted in two orthogonal polarizations with locked relative phase, making them especially suitable for interfacing with single-photon polarization qubits. Our work paves the way for the realization of long-distance quantum networks.

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