State-independent quantum key distribution

Autor(en)

Robert Kindler, Johannes Handsteiner, Jaroslav Kysela, Kuntuo Zhu, Bo Liu, Anton Zeilinger

Abstrakt

We present an adaptive procedure for aligning quantum nonlocality 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 beyond those that are performed regardless.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW), Vienna Center for Quantum Science and Technology (VCQ), Tsinghua University, National University of Defense Technology (NUDT)

Journal

Physical Review A

Band

109

Anzahl der Seiten

7

ISSN

2469-9926

DOI

https://doi.org/10.1103/PhysRevA.109.012614

Publikationsdatum

01-2024

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik

ASJC Scopus Sachgebiete

Atomic and Molecular Physics, and Optics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/256e96b5-2ceb-4e83-b3e3-600a13a37167