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quant-ph2026

Quantum Algorithm for Elliptic Curve Discrete Logarithms with Space-Efficient Point Addition

Han Luo, Ziyi Yang, Jingquan Luo +5

The paper presents a quantum algorithm for solving the elliptic curve discrete logarithm problem that uses significantly fewer logical qubits by introducing a space‑efficient rever…

quant-ph2026

Communication Complexity of Distributed Unitary Synthesis

Longcheng Li, Xiaoming Sun, Jialin Zhang +1

We study space-bounded communication complexity for unitary implementation in distributed quantum processors, where we restrict the number of qubits per processor to ensure practic…

quant-ph2026

Scalable Multi-QPU Circuit Design for Dicke State Preparation: Optimizing Communication Complexity and Local Circuit Costs

Ziheng Chen, Junhong Nie, Xiaoming Sun +2

Preparing large-qubit Dicke states is of broad interest in quantum computing and quantum metrology. However, the number of qubits available on a single quantum processing unit (QPU…

quant-ph2025

Logical operations with a dynamical qubit in Floquet-Bacon-Shor code

Xuandong Sun, Longcheng Li, Zhiyi Wu +29

Quantum error correction (QEC) protects quantum systems against inevitable noises and control inaccuracies, providing a pathway towards fault-tolerant (FT) quantum computation. Sta…

quant-ph2024

Quantum Byzantine Agreement Against Full-information Adversary

Longcheng Li, Xiaoming Sun, Jiadong Zhu

We exhibit that, when given a classical Byzantine agreement protocol designed in the private-channel model, it is feasible to construct a quantum agreement protocol that can effect…