State independent QKD

Abstract

We present an adaptive procedure for aligning quantum non-locality experiments without any knowledge of the two-qudit state shared by the participating parties. The quantum state produced by the source, its unitary evolution as well as the actual measurement bases remain unknown to both parties at all times. The entanglement of the quantum state helps establish desired correlations between individual measurement bases of the two distant parties. We implement the procedure in a fiber-based quantum key distribution (QKD) setup with polarization-entangled photons, where we do not rely on any additional alignment tools such as lasers or polarizers. In a QKD scenario the procedure can be done without any additional measurements as those that are performed regardless.

8 pages, 5 figures

References in corpus (7)

• Entanglement detection
• Satellite-to-ground quantum key distribution
• Efficient and mode selective spatial mode multiplexer based on Multi-Plane Light Conversion
• Experimental Quantum Communication without a Shared Reference Frame
• Experimental Fault-Tolerant Quantum Cryptography in a Decoherence-Free Subspace
• Fibre polarization state compensation in entanglement-based quantum key distribution
• Distribution of genuine high-dimensional entanglement over 10.2 km of noisy metropolitan atmosphere

Cited by in corpus (1)

• Implementation of space-division multiplexed entanglement-based quantum cryptography over multicore fiber