Francisco Mendieta

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— In this work we present the principles and experimental demonstration of a BB84 Quantum Key Distribution (QKD) one way system using fainted pulses and a Quadrature Phase-Shift-Keying (QPSK) format including a time-multiplexed unmodulated carrier reference at Alice's end, and a differential homodyne reception at Bob's end. We also describe the secure(More)
— In this work we present the principles of a flexible quantum key distribution (QKD) system using quadrature-phase-shift-keying (QPSK) base and symbol encoding and dual-threshold balanced homodyne detection (BHD) scheme. We give its security proofs and we compare its performance experimentally with a photon counting detection scheme.
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