456 citations · 1.9k across the 24 of their papers we have counts for
24 papers
Quantum speedup dynamics process in Schwarzschild space-time
Kai Xu, Han-Jie Zhu, Guo-Feng Zhang +2
Quantum speed limit time (QSLT) can be used to characterize the intrinsic minimal time interval for a quantum system evolving from an initial state to a target state. We investigat…
Stark many-body localization on a superconducting quantum processor
Qiujiang Guo, Chen Cheng, Hekang Li +9
Quantum emulators, owing to their large degree of tunability and control, allow the observation of fine aspects of closed quantum many-body systems, as either the regime where ther…
Simultaneous excitation of two noninteracting atoms with time-frequency correlated photon pairs in a superconducting circuit
Wenhui Ren, Wuxin Liu, Chao Song +9
Here we report the first observation of simultaneous excitation of two noninteracting atoms by a pair of time-frequency correlated photons in a superconducting circuit. The strong…
Vortex-Meissner phase transition induced by two-tone-drive-engineered artificial gauge potential in the fermionic ladder constructed by superconducting qubit circuits
Yan-Jun Zhao, Xun-Wei Xu, Hui Wang +2
We propose to periodically modulate the onsite energy via two-tone drives, which can be furthermore used to engineer artificial gauge potential. As an example, we show that the fer…
Synthesizing three-body interaction of spin chirality with superconducting qubits
Wuxin Liu, Wei Feng, Wenhui Ren +2
Superconducting qubits provide a competitive platform for quantum simulation of complex dynamics that lies at the heart of quantum many-body systems, because of the flexibility and…
Probing the dynamical phase transition with a superconducting quantum simulator
Kai Xu, Zheng-Hang Sun, Wuxin Liu +9
Non-equilibrium quantum many-body systems, which are difficult to study via classical computation, have attracted wide interest. Quantum simulation can provide insights into these…
Generation and controllable switching of superradiant and subradiant states in a 10-qubit superconducting circuit
Zhen Wang, Hekang Li, Wei Feng +9
Superradiance and subradiance concerning enhanced and inhibited collective radiation of an ensemble of atoms have been a central topic in quantum optics. However, precise generatio…
Quantum dynamical speedup in correlated noisy channels
Kai Xu, Guo-Feng Zhang, Wu-Ming Liu
The maximal evolution speed of a quantum system can be represented by quantum speed limit time (QSLT).We investigate QSLT of a two-qubit system passing through a correlated channel…
Observation of multi-component atomic Schrödinger cat states of up to 20 qubits
Chao Song, Kai Xu, Hekang Li +13
We report on deterministic generation of 18-qubit genuinely entangled Greenberger-Horne-Zeilinger (GHZ) state and multi-component atomic Schrödinger cat states of up to 20 qubits o…
Multiparticle Entanglement Resolution Analyzer based on Quantum-Control-Assisted Uncertainty Relation
Shao-Qiang Ma, Xiao Zheng, Guo-Feng Zhang +3
We construct a quantum-control-assisted multi-observable variance-based uncertainty relation, and the uncertainty relation obtained indicates that we can prepare a quantum state, i…
Dynamical speedup of a two-level system induced by coupling in the hierarchical environment
Kai Xu, Guo-Feng Zhang, Wu-Ming Liu
We investigate the dynamics of a two-level system in the presence of an overall environment composed of two layers. The first layer is just one single-mode cavity which decays to m…
Dephasing-insensitive quantum information storage and processing with superconducting qubits
Qiujiang Guo, Shi-Biao Zheng, Jianwen Wang +11
A central task towards building a practical quantum computer is to protect individual qubits from decoherence while retaining the ability to perform high-fidelity entangling gates…
A Unified and Strengthened Framework for the Uncertainty Relation
Xiao Zheng, Shao-Qiang Ma, Guo-Feng Zhang +2
We provide a unified and strengthened framework for the product form and the sum form variance-based uncertainty relations by constructing a unified uncertainty relation. In the un…
Continuous-variable geometric phase and its manipulation for quantum computation in a superconducting circuit
Chao Song, Shi-Biao Zheng, Pengfei Zhang +10
Geometric phase, associated with holonomy transformation in quantum state space, is an important quantum-mechanical effect. Besides fundamental interest, this effect has practical…
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…
Solving Systems of Linear Equations with a Superconducting Quantum Processor
Yarui Zheng, Chao Song, Ming-Cheng Chen +15
Superconducting quantum circuits are promising candidate for building scalable quantum computers. Here, we use a four-qubit superconducting quantum processor to solve a two-dimensi…
10-qubit entanglement and parallel logic operations with a superconducting circuit
Chao Song, Kai Xu, Wuxin Liu +16
Here we report on the production and tomography of genuinely entangled Greenberger-Horne-Zeilinger states with up to 10 qubits connecting to a bus resonator in a superconducting ci…
Finite field calculations of static polarizabilities and hyperpolarizabilities of In and Sr
Yan-mei Yu, Bing-bing Suo, Hui-hui Feng +2
The finite field calculations are performed for two heavy frequency-standard candidates In and Sr. The progressive hierarchy of electron correlations is implemented by the rela…
Fermionic non-Abelian fractional Chern insulators from dipolar interactions
Dong Wang, Zhao Liu, Wu-Ming Liu +2
We study fermions on a triangular lattice model that exhibits topological flatbands characterized by nonzero Chern numbers. Our scheme stems from the well-known Hofstadter model bu…
Interaction and filling-induced quantum anomalous Hall effect in ultra-cold neutral Bose-Fermi mixture on hexagonal lattice
Shang-Shun Zhang, Heng Fan, Wu-Ming Liu
We investigate the quantum anomalous Hall effect in a mixture of ultra-cold neutral bosons and fermions held on a hexagonal optical lattice. In the strong atom-atom interaction lim…
The Euler Number of Bloch States Manifold and the Quantum Phases in Gapped Fermionic Systems
Yu-Quan Ma, Shi-Jian Gu, Shu Chen +2
We propose a topological Euler number to characterize nontrivial topological phases of gapped fermionic systems, which originates from the Gauss-Bonnet theorem on the Riemannian st…
Topological Quantum Phase Transition in Synthetic Non-Abelian Gauge Potential
Fadi Sun, Xiao-Lu Yu, Jinwu Ye +2
The method of synthetic gauge potentials opens up a new avenue for our understanding and discovering novel quantum states of matter. We investigate the topological quantum phase tr…
Thermalization from a general canonical principle
Shuai Cui, Jun-Peng Cao, Hui Jing +2
We investigate the time evolution of a generic and finite isolated quantum many-body system starting from a pure quantum state. We find the kinematical general canonical principle…
Diffractions of Bose-Einstein Condensate in Quantized Light Fields
Peng Zhang, Jian-Hua Wu, Zhao-Yuan Ma +2
We investigate the atomic diffractions of a Bose-Einstein condensate in quantized light fields. Situations in which the light fields are in number states or coherent states are stu…