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quant-ph2026

Deterministic and Programmable Fusion for Scalable Generation of Photonic Graph States

Yan Li, Yunfan Yang, Zenghui Bao +6

Entanglement in multiphoton graph states is an important resource with various applications, such as measurement-based quantum computing and memory-less quantum repeaters. While so…

quant-ph2026★ 15 cited

Cryogenic Multiplexing Control Chip for Superconducting Quantum Processor

Rutian Huang, Xiao Geng, Xinyu Wu +4

This paper proposes a scheme and design of cryogenic multiplexing control chip (MCC) which enables one microwave cable to control many superconducting qubits. Designed based on adj…

quant-ph2026

Trace-distance-based complementarity relations in a multipath interferometer

Yue Sun, Jingyan Liu, Peng-Tong Li +2

The complementarity relations in an interferometer reflect an important phenomenon in quantum mechanics: wave-particle duality. Here, we develop a method to quantify both wave and…

quant-ph2026

Nuclear Spin Squeezing Based on Spin-Exchange Collisions

He-bin Zhang, Yuanjiang Tang, Yong-Chun Liu

Isolation from environment leads to the days-long lifetime of noble-gas nuclear spins, but also brings great challenges to the preparation, manipulation, and measurement of nuclear…

quant-ph2026

No Cloning of Quantum Ensembles

Zhenyu Du, Siyuan Cheng, Qi Zhao +2

Modern quantum physics now enables control of quantum systems at the level of individual trajectories, opening a new frontier that links quantum information theory, quantum many-bo…

quant-ph2026★ 12 cited

Robust and optimal control of open quantum systems

Zi-Jie Chen, Hongwei Huang, Lida Sun +9

Recent advancements in quantum technologies have highlighted the importance of mitigating system imperfections, including parameter uncertainties and decoherence effects, to improv…

quant-ph2026

Achieving double-logarithmic precision dependence in optimization-based quantum unstructured search

Zhijian Lai, Dong An, Jiang Hu +1

Grover's algorithm is a fundamental quantum algorithm that achieves a quadratic speedup for unstructured search problems of size . Recent studies have reformulated this task as…

quant-ph2026

Generating large-scale Greenberger-Horne-Zeilinger-like states in lattice spin systems

Xuanchen Zhang, Yaofeng Chen, Yong-Chun Liu

Greenberger-Horne-Zeilinger (GHZ) state is a typical maximally entangled state which is pursued in both fundamental research and emerging quantum technologies. Preparing large-scal…

quant-ph2026★ 1 cited

The necessary and sufficient condition for perfect teleportation and superdense coding and all the suitable states for teleportation and superdense coding

Dafa Li

It is known that two local unitaries (LU) equivalent states possess the same amount of entanglement and can be used to perform the same tasks in quantum information theory (QIT). F…

quant-ph2026★ 11 cited

A building block of quantum repeaters for scalable quantum networks

Wen-Zhao Liu, Ya-Bin Zhou, Jiu-Peng Chen +26

Quantum networks, integrating quantum communication, quantum metrology, and distributed quantum computing, could provide secure and efficient information transfer, high-resolution…

quant-ph2026

Estimating the performance boundary of Gottesman-Kitaev-Preskill codes and number-phase codes

Kai-Xuan Wen, Dong-Long Hu, Shengyong Li +1

Bosonic quantum error-correcting codes encode logical information in a harmonic oscillator, with the Gottesman-Kitaev-Preskill (GKP) and number-phase (NP) codes representing two fu…

quant-ph2026

Quantum Data Structure for Range Minimum Query

Qisheng Wang, Zhean Xu, Zhicheng Zhang

Given an array , the Range Minimum Query (RMQ) problem is to maintain a data structure that supports RMQ queries: given a range , find the index of the minimum ele…

quant-ph2026

Principles of Optics in the Fock Space: Scalable Manipulation of Giant Quantum States

Yifang Xu, Yilong Zhou, Ziyue Hua +11

The manipulation of distinct degrees of freedom of photons plays a critical role in both classical and quantum information processing. While the principles of wave optics provide e…

quant-ph2026

Pareto Front Engineering of Dynamical Sweet Spots in Superconducting Qubits

Zhen Yang, Shan Jin, Yajie Hao +4

Operating superconducting qubits at dynamical sweet spots (DSSs) suppresses decoherence from low-frequency flux noise. A key open question is how long coherence can be extended und…

quant-ph2026

Topology-Aware Block Coordinate Descent for Qubit Frequency Allocation of Superconducting Quantum Processors

Zheng Zhao, Weifeng Zhuang, Yanwu Gu +3

Pre-execution calibration is a major bottleneck for operating superconducting quantum processors, and qubit frequency allocation is especially challenging due to crosstalk-coupled…