269 citations · 554 across the 14 of their papers we have counts for
14 papers
Logarithmic light cone, slow entanglement growth, and quantum memory
Yu Zeng, Alioscia Hamma, Yu-Ran Zhang +4
Effective light cones, characterized by Lieb-Robinson bounds, emerge in nonrelativistic local quantum systems. Here, we present several analytical results derived from logarithmic…
Dynamical singularity of the rate function for quench dynamics in finite-size quantum systems
Yumeng Zeng, Bozhen Zhou, Shu Chen
The dynamical quantum phase transition is characterized by the emergence of nonanalytic behaviors in the rate function, corresponding to the occurrence of exact zero points of the…
Holographic Anomalous Chiral Current Near a Boundary
Rong-Xin Miao, Yu-Qian Zeng
Due to the Weyl anomaly, an axial vector field produces novel anomalous chiral currents in spacetime with boundaries. Remarkably, the chiral current is not invariant under the gaug…
Bounded light cone and robust topological order out of equilibrium
Yu Zeng, Alioscia Hamma, Yu-Ran Zhang +3
The ground state degeneracy of topologically ordered gapped Hamiltonians is the bedrock for self-correcting quantum memories, which are unfortunately not stable away from equilibri…
Multipartite entanglement of the topologically ordered state in a perturbed toric code
Yu-Ran Zhang, Yu Zeng, Tao Liu +3
We demonstrate that multipartite entanglement, witnessed by the quantum Fisher information (QFI), can characterize topological quantum phase transitions in the spin- t…
Exact zeros of the Loschmidt echo and quantum speed limit time for the dynamical quantum phase transition in finite-size systems
Bozhen Zhou, Yumeng Zeng, Shu Chen
We study exact zeros of Loschmidt echo and quantum speed limit time for dynamical quantum phase transition in finite size systems. Our results illustrate that exact zeros of Loschm…
Protecting topological order by dynamical localization
Yu Zeng, Alioscia Hamma, Yu-Ran Zhang +3
As a prototype model of topological quantum memory, two-dimensional toric code is genuinely immune to generic local static perturbations, but fragile at finite temperature and also…
Observation of dynamical quantum phase transition by a superconducting qubit simulation
Xue-Yi Guo, Chao Yang, Yu Zeng +7
A dynamical quantum phase transition can occur during time evolution of sudden quenched quantum systems across a phase transition. It corresponds to the nonanalytic behavior at a c…
A Universal Quantum Computing Virtual Machine
Qian-Tan Hong, Zi-Yong Ge, Wen Wang +8
A medium-scale quantum computer with full universal quantum computing capability is necessary for various practical aims and testing applications. Here we report a 34-qubit quantum…
Diagonal entropy in many-body systems: Volume effect and quantum phase transitions
Zhengan Wang, Zheng-Hang Sun, Yu Zeng +4
We investigate the diagonal entropy(DE) of the ground state for quantum many-body systems, including the XY model and the Ising model with next nearest neighbour interactions. We f…
Characterization of topological states via dual multipartite entanglement
Yu-Ran Zhang, Yu Zeng, Heng Fan +2
We demonstrate that multipartite entanglement is able to characterize one-dimensional symmetry-protected topological order, which is witnessed by the scaling behavior of the quantu…
Emulating many-body localization with a superconducting quantum processor
Kai Xu, Jin-Jun Chen, Yu Zeng +12
The law of statistical physics dictates that generic closed quantum many-body systems initialized in nonequilibrium will thermalize under their own dynamics. However, the emergence…
Disorder-protected topological entropy after a quantum quench
Yu Zeng, Alioscia Hamma, Heng Fan
Topological phases of matter are considered the bedrock of novel quantum materials as well as ideal candidates for quantum computers that possess robustness at the physical level.…
Thermalization of Topological Entropy after a Quantum Quench
Yu Zeng, Alioscia Hamma, Heng Fan
In two spatial dimensions, topological order is robust for static deformations at zero temperature, while it is fragile at any finite temperature. How robust is topological order a…