184 citations · 629 across the 18 of their papers we have counts for
19 papers
Anomaly fluctuation theorem for quantum coherence dynamics
Kun Zhang, Hai-Long Shi, Xiao-Hui Wang +1
Quantum coherence is a central resource in quantum information science, yet general frameworks and constraints governing its dynamics remain limited. Although quantum coherence lac…
Emergent mirror symmetry in the optimization of the central-spin quantum battery
Hui-Yu Yang, Kun Zhang, Xiao-Hui Wang +1
Quantum batteries provide a useful setting for exploring nonequilibrium many-body effects in energy storage. Here we investigate the optimization of a quantum battery based on the…
Palindromic structure of depth-efficient quantum search algorithms
Kun Zhang, Hai-Long Shi, Xiao-Hui Wang +1
Grover's algorithm is optimal in query complexity, but not necessarily in circuit depth. We formulate unstructured quantum search as a circuit-depth optimization problem and identi…
Global Bounds beyond Local Quantum Metrology
Hai-Long Shi, Augusto Smerzi
Quantum Cramér--Rao theory is intrinsically local: it bounds precision near a specified parameter value, and its saturating measurement generally depends on that value. Barankin-ty…
Fluctuation theorems for multipartite quantum coherence and correlation dynamics
Kun Zhang, Mo-Yang Ni, Hai-Long Shi +2
Fluctuation theorems establish exact relations for nonequilibrium dynamics, profoundly advancing the field of stochastic thermodynamics. In this work, we extend quantum fluctuation…
Quantum Charging Advantage from Multipartite Entanglement
Hai-Long Shi, Li Gan, Kun Zhang +2
Collective quantum batteries (QBs) demonstrate remarkable acceleration in charging dynamics compared to their individual counterparts, underscoring the pivotal contribution of quan…
Optimal energy storage and collective charging speedup in the central-spin quantum battery
Hui-Yu Yang, Kun Zhang, Xiao-Hui Wang +1
Quantum batteries (QBs) exploit principles of quantum mechanics to accelerate the charging process and aim to achieve optimal energy storage. However, analytical results for invest…
Optimal energy storage in the Tavis-Cummings quantum battery
Hui-Yu Yang, Hai-Long Shi, Qing-Kun Wan +3
The Tavis-Cummings (TC) model, which serves as a natural physical realization of a quantum battery, comprises atoms as battery cells that collectively interact with a shared…
Universal shot-noise limit for quantum metrology with local Hamiltonians
Hai-Long Shi, Xi-Wen Guan, Jing Yang
Quantum many-body interactions can induce quantum entanglement among particles, rendering them valuable resources for quantum-enhanced sensing. In this work, we derive a universal…
Quantum metrology enhanced by the spin interaction in a generalized Tavis-Cummings model
Yuguo Su, Wangjun Lu, Hai-Long Shi
Quantum metrology is recognized for its capability to offer high-precision estimation by utilizing quantum resources, such as quantum entanglement. Here, we propose a generalized T…
Quantum-Enhanced Metrology in Cavity Magnomechanics
Qing-Kun Wan, Hai-Long Shi, Xi-Wen Guan
Magnons, as fundamental quasiparticles emerged in elementary spin excitations, hold a big promise for innovating quantum technologies in information coding and processing. Here we…
Entanglement and work extraction in the central-spin quantum battery
Jia-Xuan Liu, Hai-Long Shi, Yun-Hao Shi +2
We consider a central-spin battery where central spins serve as battery cells and bath spins serve as charging units. It is shown that the energy stored in the battery…
Entanglement, Coherence, and Extractable Work in Quantum Batteries
Hai-Long Shi, Shu Ding, Qing-Kun Wan +2
We investigate the connection between quantum resources and extractable work in quantum batteries. We demonstrate that quantum coherence in the battery or the battery-charger entan…
Multi-particle quantum walks and Fisher information in one-dimensional lattices
Xiaoming Cai, Hongting Yang, Hai-Long Shi +3
Recent experiments on quantum walks (QWs) of a single and two particles demonstrated subtle quantum statistics-dependent walks in one-dimensional (1D) lattices. However the roles o…
Coherence of an extended central spin model with a coupled spin bath
Pengcheng Lu, Hai-Long Shi, Like Cao +4
We study an extended central spin model with an isotropic nearest-neighbour spin-exchange interaction among the bath spins. The system is controllable by external magnetic fields a…
Decoherence dynamics of entangled quantum states in the central spin model
Qing-Kun Wan, Hai-Long Shi, Xu Zhou +2
Maintaining coherence of a qubit is of vital importance for realizing a large-scale quantum computer in practice. In this work, we study the central spin decoherence problem in the…
Quantum Coherence in a Quantum Heat Engine
Yun-Hao Shi, Hai-Long Shi, Xiao-Hui Wang +4
We identify that quantum coherence is a valuable resource in the quantum heat engine, which is designed in a quantum thermodynamic cycle assisted by a quantum Maxwell's demon. This…
Coherence transformations in single qubit systems
Hai-Long Shi, Xiao-Hui Wang, Si-Yuan Liu +3
We investigate the single qubit transformations under several typical coherence-free operations, such as, incoherent operation (IO), strictly incoherent operation (SIO), physically…
Coherence depletion in the Grover quantum search algorithm
Hai-Long Shi, Si-Yuan Liu, Xiao-Hui Wang +3
We investigate the role of quantum coherence depletion (QCD) in Grover search algorithm (GA) by using several typical measures of quantum coherence and quantum correlations. By usi…