Decoherence assisted quantum key distribution
May 30, 2024·,
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1 min read
Daniel R. Sabogal
Daniel F. Urrego

Juan Rafael Alvarez
Andrés F. Herrera
Juan P. Torres
Alejandra Valencia

Abstract
We present a theoretical and experimental study of a controllable decoherence-assisted quantum key distribution scheme. Our method is based on the possibility of introducing controllable decoherence to polarization qubits using the spatial degree of freedom of light. We show that our method reduces the amount of information that an eavesdropper can obtain in the BB84 protocol under the entangling probe attack. We demonstrate experimentally that Alice and Bob can agree on a scheme to that gives low values of the quantum bit error rate, despite the presence of a large amount of decoherence in the transmission channel of the BB84 protocol.
Type