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12 papers · 2 filters
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…
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…
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…
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…
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…
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…