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

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.

References in corpus (11)

• Device-independent security of quantum cryptography against collective attacks
• Measurement device independent quantum key distribution over 404 km optical fibre
• Device-independent quantum key distribution secure against collective attacks
• Post-selection technique for quantum channels with applications to quantum cryptography
• Breaking the Rate-Loss Bound of Quantum Key Distribution with Asynchronous Two-Photon Interference
• Experimental polarization encoded quantum key distribution over optical fibres with real-time continuous birefringence compensation
• Experimental demonstration of drone-based quantum key distribution
• Repeater-like asynchronous measurement-device-independent quantum conference key agreement
• Experimental Efficient Source-Independent Quantum Secret Sharing against Coherent Attacks
• Advances in Continuous Variable Measurement-Device-Independent Quantum Key Distribution
• Quantum Discord Witness With Uncharacterized Devices