22 citations · 53 across the 10 of their papers we have counts for
14 papers · 1 filter
Relative-Entropy Geometry and Convergence in Nonconvex Wiretap Optimization
Farzin Salek, Masahito Hayashi
We develop and analyze an entropic descent method for a nonconvex optimization problem on probability simplices arising in classical and quantum secure communication. The optimizat…
Nonadditivity in fermionic quantum Shannon theory
Farzin Salek, Amir-Reza Negari, Graeme Smith +2
We study collective state preparation and channel encoding in fermionic systems under parity superselection and composition governed by the canonical anticommutation relations. For…
From Symmetry to Secrecy: Covariant Classical--Quantum Wiretap Channels
Masahito Hayashi, Farzin Salek
For classical--quantum wiretap channels with a transitive covariant input action, both output ensembles admit a description as unitary group orbits of fixed seed states. We use thi…
Approximation theorems for fermionic Gaussian states
Amir-Reza Negari, Farzin Salek, Zoltán Zimborás +3
A recurring principle in many-body physics is that sufficiently distributed interactions or correlations lead to an effectively mean-field description. For fermionic Gaussian state…
Quantum Broadcast Channels with Mutually Confidential Messages
Paula Belzig, Sukanya Ghosal, Farzin Salek +1
We study the transmission of two independent confidential classical messages over a quantum broadcast channel, one for each receiver. Each message must remain secret from the other…
Robust CHSH Self-Testing with Finite-Energy GKP States
Farzin Salek, Masahito Hayashi
We present a full-oscillator analysis of a finite-energy GKP CHSH test whose observed score yields robust Bell-pair self-testing. Periodically binned position and momentum give the…
Entanglement sharing schemes
Zahra Khanian, Dongjin Lee, Debbie Leung +7
We ask how quantum correlations can be distributed among many subsystems. To address this, we define entanglement sharing schemes (ESS) where certain pairs of subsystems allow enta…
Extendibility of Fermionic Gaussian States
Amir-Reza Negari, Farzin Salek
We investigate -extendibility of fermionic Gaussian states, a property central to quantum correlations and approximations of separability. We show that these states are…
Efficiently Computable Limits on EPR Pair Generation in Quantum Broadcast Channels
Patrick Hayden, Debbie Leung, Hjalmar Rall +1
We investigate the generation of EPR pairs between three observers in a general causally structured setting, where communication occurs via a noisy quantum broadcast channel. The m…
Three-Receiver Quantum Broadcast Channels: Classical Communication with Quantum Non-unique Decoding
Farzin Salek, Patrick Hayden, Masahito Hayashi
In network communication, it is common in broadcasting scenarios for there to exist a hierarchy among receivers based on information they decode due, for example, to different phys…
Quantum communication on the bosonic loss-dephasing channel
Francesco Anna Mele, Farzin Salek, Vittorio Giovannetti +1
Quantum optical systems are typically affected by two types of noise: photon loss and dephasing. Despite extensive research on each noise process individually, a comprehensive unde…
New Protocols for Conference Key and Multipartite Entanglement Distillation
Farzin Salek, Andreas Winter
We approach two interconnected problems of quantum information processing in networks: Conference key agreement and entanglement distillation, both in the so-called source model wh…
Usefulness of adaptive strategies in asymptotic quantum channel discrimination
Farzin Salek, Masahito Hayashi, Andreas Winter
Adaptiveness is a key principle in information processing including statistics and machine learning. We investigate the usefulness of adaptive methods in the framework of asymptoti…
Multi-User Distillation of Common Randomness and Entanglement from Quantum States
Farzin Salek, Andreas Winter
We construct new protocols for the tasks of converting noisy multipartite quantum correlations into noiseless classical and quantum ones using local operations and classical commun…