Finite-Key Analysis of Quantum Key Distribution with Characterized Devices Using Entropy Accumulation

Understand

The Entropy Accumulation Theorem (EAT) was introduced to significantly improve the finite-size rates for device-independent quantum information processing tasks such as device-independent quantum key distribution (QKD).

• A natural question would be whether it also improves the rates for device-dependent QKD.
• In this work, we provide an affirmative answer to this question.
• We present new tools for applying the EAT in the device-dependent setting.