6 citations · 11 across the 6 of their papers we have counts for
8 papers
Flexible rigidity: Compiling generic trusted-preparation protocols into sequential device-independent protocols
Amir Arqand, Srijita Kundu, Ernest Y. -Z. Tan
We give a generic compiler for turning a wide class of device-dependent protocols with trusted state preparation into sequential device-independent protocols. In order for our comp…
Log-Euclidean Rényi Conditional Mutual Information
Roberto Rubboli, Amir Arqand, Mark M. Wilde
Quantum conditional mutual information (QCMI) is a fundamental measure of conditional independence, with central applications throughout quantum information theory and many-body ph…
A rigorous and complete security proof of decoy-state BB84 quantum key distribution
Devashish Tupkary, Shlok Nahar, Amir Arqand +2
We present a rigorous and complete security proof of the decoy-state BB84 quantum key distribution (QKD) protocol. Our analysis aims to achieve a high standard of mathematical rigo…
Marginal-constrained entropy accumulation theorem
Amir Arqand, Ernest Y. -Z. Tan
We derive a novel chain rule for a family of channel conditional entropies, covering von Neumann and sandwiched Rényi entropies. In the process, we show that these channel conditio…
Mutual information chain rules for security proofs robust against device imperfections
Amir Arqand, Tony Metger, Ernest Y. -Z. Tan
In this work we derive a number of chain rules for mutual information quantities, suitable for analyzing quantum cryptography with imperfect devices that leak additional informatio…
Finite-size analysis of prepare-and-measure and decoy-state QKD via entropy accumulation
Lars Kamin, Amir Arqand, Ian George +2
An important goal in quantum key distribution (QKD) is the task of providing a finite-size security proof without the assumption of collective attacks. For prepare-and-measure QKD,…
Generalized Rényi entropy accumulation theorem and generalized quantum probability estimation
Amir Arqand, Thomas A. Hahn, Ernest Y. -Z. Tan
The entropy accumulation theorem, and its subsequent generalized version, is a powerful tool in the security analysis of many device-dependent and device-independent cryptography p…
Lipschitz continuity of quantum-classical conditional entropies with respect to angular distance and related properties
Michael Liaofan Liu, Florian Kanitschar, Amir Arqand +1
We derive a Lipschitz continuity bound for quantum-classical conditional entropies with respect to angular distance, with a Lipschitz constant that is independent of the dimension…