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quant-ph2026
Asymptotically Optimal Circuit Depth for Diagonal Unitary Synthesis and Compilation on Two-Dimensional Grids
Chengzhuo Xu, Xiao Chen, Zhihao Liu +1
Diagonal unitaries are a fundamental but resource-intensive class of quantum operations, arising as the phase separators of QAOA and the time-evolution blocks of Hamiltonian simula…
quant-ph2025
A Unified Framework for Optimizing Uniformly Controlled Structures in Quantum Circuits
Chengzhuo Xu, Xiao Chen, Xi Li +2
Quantum unitaries of the form are ubiquitous in quantum algorithms. This class encompasses not only standard uniformly controlled gates (UCGs) bu…
quant-ph2007★ 40 cited
Efficient quantum direct communication with authentication
Liu Wen-jie, Chen Han-wu, Li Zhi-qiang +1
Two protocols of quantum direct communication with authentication [Phys. Rev. A 73, 042305(2006)] were recently indicated to be insecure against the authenticator Trent's attacks […