18 citations · 19 across the 10 of their papers we have counts for
12 papers
Ergotropy of nonequilibrium steady states beyond the full secular approximation
Xing-Xing Hu, Hui-Yu Yang, Kun Zhang +1
Understanding the generation and activation of ergotropy, the maximum work extractable by cyclic unitary operations, is central to quantum battery research. Positive-temperature th…
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…
Negative quasiprobability trajectories for Bell-diagonal states under local decoherence
Qing Yu, Kun Zhang, Yang-Yang Chen +1
The fluctuation theorem (FT) relates microscopic trajectory distributions to macroscopic averages. Using quasiprobability trajectories, this framework has recently been extended to…
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…
Asymptotic optimality of Grover-Radhakrishnan-Korepin algorithm
Kun Zhang, Kang-Yuan Chen, Xiao-Hui Wang +1
Grover's algorithm is a cornerstone of quantum algorithms and is strictly optimal in oracle-query complexity. While the full search problem admits no further improvement, one may t…
Asymptotic bounds on quantum partial search algorithm and its applications to parallel search
Yan-Bo Jiang, Xiao-Hui Wang, Kun Zhang +1
Grover's algorithm provides a quadratic speedup over classical algorithms for searching an unstructured database and is known to be strictly optimal in oracle query complexity, wit…
Minimal nonintegrable models with three-site interactions
Wen-Ming Fan, Kun Hao, Yang-Yang Chen +3
We study integrability breaking in translationally invariant spin- chains with genuine three-site interactions. Using a two-qubit composite representation, we prove that the d…
Absence of local conserved charges of the Fredkin spin chain and its truncated versions
Wen-Ming Fan, Kun Hao, Yang-Yang Chen +3
Conservation laws serve as the hallmark of integrability. The absence of conserved charges typically implies that the model is nonintegrable. The recently proposed Fredkin spin cha…
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…