Related papers: Massive-mode polarization entangled biphoton frequency comb

Massive-mode polarization entangled biphoton frequency comb

URL: http://arxiv.org/abs/2101.04410v2
Date: Mon, 6 Jun 2022 11:03:37 GMT
Title: Massive-mode polarization entangled biphoton frequency comb
Authors: Tomohiro Yamazaki, Rikizo Ikuta, Toshiki Kobayashi, Shigehito Miki, Fumihiro China, Hirotaka Terai, Nobuyuki Imoto and Takashi Yamamoto
Abstract summary: A biphoton frequency comb (BFC) with entanglement can be used to prepare both states. We demonstrate polarization entangled BFCs with over 1400 frequency modes. The efficient generation of a massive-mode entangled BFC is expected to accelerate the increase of capacity in quantum communication.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: A frequency-multiplexed entangled photon pair and a high-dimensional hyperentangled photon pair are useful to realize a high-capacity quantum communication. A biphoton frequency comb (BFC) with entanglement can be used to prepare both states. We demonstrate polarization entangled BFCs with over 1400 frequency modes, which is approximately two orders of magnitude larger than those of earlier entangled BFCs, by placing a singly resonant periodically poled LiNbO3 waveguide resonator within a Sagnac loop. The BFCs are demonstrated by measuring the joint spectral intensity, cross-correlation, and autocorrelation. Moreover, the polarization entanglement at representative groups of frequency modes is verified by quantum state tomography, where each fidelity is over 0.7. The efficient generation of a massive-mode entangled BFC is expected to accelerate the increase of capacity in quantum communication.

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