4 papers · 1 filter
Proving security of BB84 under source correlations
Ashutosh Marwah, Frédéric Dupuis
Device imperfections and memory effects can result in undesired correlations among the states generated by a realistic quantum source. These correlations are called source correlat…
Security proof for parallel DIQKD
Ashutosh Marwah, Frédéric Dupuis
We present a parallel device independent quantum key distribution (DIQKD) protocol based on the CHSH game and prove its security. Using techniques developed for analysing the paral…
Universal chain rules from entropic triangle inequalities
Ashutosh Marwah, Frédéric Dupuis
The von Neumann entropy of an -partite system given a system can be written as the sum of the von Neumann entropies of the individual subsystems given $A_1^{k-…
Joint State-Channel Decoupling and One-Shot Quantum Coding Theorem
Hao-Chung Cheng, Frédéric Dupuis, Li Gao
In this work, we consider decoupling a bipartite quantum state via a general quantum channel. We propose a joint state-channel decoupling approach to obtain a one-shot error expone…