Realizing fully reference-frame-independent quantum key distribution by exploiting quantum discord

• URL: http://arxiv.org/abs/2305.09404v1
• Date: Tue, 16 May 2023 12:49:18 GMT
• Title: Realizing fully reference-frame-independent quantum key distribution by exploiting quantum discord
• Authors: Rong Wang, and Chun-Mei Zhang
• Abstract summary: We propose a 3 times 3 matrix whose singular values are independent on both polar angle and azimuthal angle. We numerically show that the performance of our method can reduce to the previous one if the key generation basis is calibrated.
• Score: 18.2807336699526
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Reference-frame-independent quantum key distribution was proposed to generate a string of secret keys without a shared reference frame. Based on the Bloch sphere, however, the security analysis in previous methods is only independent on azimuthal angle, while a reference frame is determined by both polar angle and azimuthal angle. Here, we propose a 3 \times 3 matrix whose singular values are independent on both polar angle and azimuthal angle, as well as take advantage of quantum discord, to realize a fully reference-frame-independent quantum key distribution. Furthermore, we numerically show that the performance of our method can reduce to the previous one if the key generation basis is calibrated.

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