5 papers · 1 filter
Coherence Rather Than Error Rate Governs Privacy in Multi-Tenant Quantum Computing
Farhad Farokhi
Multi-tenant computing enables providers of commercial cloud quantum processors to rent disjoint sectors of a device to independent users. Average gate error, which cloud quantum c…
Maximal quantum leakage: operational interpretation and quantum channel analysis
Shuixin Xiao, Zijia Zhao, Jingge Zhu +1
Maximal quantum leakage quantifies privacy against adversaries with arbitrary intentions. In this work, we prove that computing this leakage is equivalent to minimum-error quantum…
Perturbation Analysis of Maximal Quantum Leakage
Zijia Zhao, Shuixin Xiao, Farhad Farokhi
Maximal quantum leakage (MQL) is a worst-case information leakage measure that quantifies an adversary's inference advantage gained from accessing quantum encoding of classical dat…
An Information-Theoretic Principle for Optimal Quantum Encoding: Tight Frames and Equiangular Ensembles
Farhad Farokhi, Shuixin Xiao
Optimal encoding of classical data for quantum-assisted statistical inference is investigated from an information-theoretic perspective. We prove that the accuracy of any quantum-c…
Precision and Privacy in Distributed Quantum Sensing: A Quantum Fisher Information Duality
Farhad Farokhi
We establish a quantum Fisher information (QFI) duality for distributed quantum sensor networks with local phase encoding. For any -qubit probe state, where denotes the numb…