67 citations · 380 across the 24 of their papers we have counts for
24 papers
Enhancement of sensitivity near exceptional points in dissipative qubit-resonator systems
Pei-Rong Han, Fan Wu, Xin-Jie Huang +11
Dissipation usually plays a negative role in quantum metrological technologies, which aim to improve measurement precision by leveraging quantum effects that are vulnerable to envi…
Topological eigenvalues braiding and quantum state transfer near a third-order exceptional point
He Zhang, Tong Liu, Zhongcheng Xiang +3
Non-Hermitian systems exhibit a variety of unique features rooted in the presence of exceptional points (EP). The distinct topological structure in the proximity of an EP gives ris…
Experimental demonstration of spontaneous symmetry breaking with emergent multi-qubit entanglement
Ri-Hua Zheng, Wen Ning, Jia-Hao Lü +8
Spontaneous symmetry breaking (SSB) is crucial to the occurrence of phase transitions. Once a phase transition occurs, a quantum system presents degenerate eigenstates that lack th…
Observation of multiple steady states with engineered dissipation
Li Li, Tong Liu, Xue-Yi Guo +8
Simulating the dynamics of open quantum systems is essential in achieving practical quantum computation and understanding novel nonequilibrium behaviors. However, quantum simulatio…
Efficient Quantum Mixed-State Tomography with Unsupervised Tensor Network Machine Learning
Wen-jun Li, Kai Xu, Heng Fan +2
Quantum state tomography (QST) is plagued by the ``curse of dimensionality'' due to the exponentially-scaled complexity in measurement and data post-processing. Efficient QST schem…
Tunable Coupling Architectures with Capacitively Connecting Pads for Large-Scale Superconducting Multi-Qubit Processors
Gui-Han Liang, Xiao-Hui Song, Cheng-Lin Deng +20
We have proposed and experimentally verified a tunable inter-qubit coupling scheme for large-scale integration of superconducting qubits. The key feature of the scheme is the inser…
Sequential sharing of two-qudit entanglement based on the entropic uncertainty relation
Ming-Liang Hu, Heng Fan
Entanglement and uncertainty relation are two focuses of quantum theory. We relate entanglement sharing to the entropic uncertainty relation in a -dimensional system v…
Two-level approximation of transmons in quantum quench experiments
H. S. Yan, Yong-Yi Wang, S. K. Zhao +7
Quantum quench is a typical protocol in the study of nonequilibrium dynamics of quantum many-body systems. Recently, a number of experiments with superconducting transmon qubits ar…
Revealing inherent quantum interference and entanglement of a Dirac particle
Wen Ning, Ri-Hua Zheng, Yan Xia +7
Although originally predicted in relativistic quantum mechanics, Zitterbewegung can also appear in some classical systems, which leads to the important question of whether Zitterbe…
Multipartite entanglement detection based on generalized state-dependent entropic uncertainty relation for multiple measurements
Li-Hang Ren, Yun-Hao Shi, Jin-Jun Chen +1
We present the generalized state-dependent entropic uncertainty relations in multiple measurements setting, and the optimal lower bound is obtained by considering different measure…
A Probabilistic Imaginary Time Evolution Algorithm Based on Non-unitary Quantum Circuit
Hao-Nan Xie, Shi-Jie Wei, Fan Yang +4
Imaginary time evolution is a powerful tool applied in quantum physics, while existing classical algorithms for simulating imaginary time evolution suffer high computational comple…
Exceptional entanglement phenomena: non-Hermiticity meeting non-classicality
Pei-Rong Han, Fan Wu, Xin-Jie Huang +11
Non-Hermitian (NH) extension of quantum-mechanical Hamiltonians represents one of the most significant advancements in physics. During the past two decades, numerous captivating NH…
Observation of entanglement negativity transition of pseudo-random mixed states
Tong Liu, Shang Liu, Hekang Li +7
Multipartite entanglement is a key resource for quantum computation. It is expected theoretically that entanglement transition may happen for multipartite random quantum states, ho…
Observation of critical phase transition in a generalized Aubry-André-Harper model on a superconducting quantum processor with tunable couplers
Hao Li, Yong-Yi Wang, Yun-Hao Shi +15
Quantum simulation enables study of many-body systems in non-equilibrium by mapping to a controllable quantum system, providing a new tool for computational intractable problems. H…
Improving the performance of quantum approximate optimization for preparing non-trivial quantum states without translational symmetry
Zheng-Hang Sun, Yong-Yi Wang, Jian Cui +1
The variational preparation of complex quantum states using the quantum approximate optimization algorithm (QAOA) is of fundamental interest, and becomes a promising application of…
A Necessary and Sufficient Entanglement Criterion of N-qubit System Based on Correlation Tensor
Feng-Lin Wu, Si-Yuan Liu, Wen-Li Yang +2
Great advances have been achieved in studying characteristics of entanglement for fundamentals of quantum mechanics and quantum information processing. However, even for N-qubit sy…
Entanglement-interference complementarity and experimental demonstration in a superconducting circuit
Xin-Jie Huang, Pei-Rong Han, Wen Ning +12
Quantum entanglement between an interfering particle and a detector for acquiring the which-path information plays a central role for enforcing Bohr's complementarity principle. Ho…
ScQ cloud quantum computation for generating Greenberger-Horne-Zeilinger states of up to 10 qubits
Chi-Tong Chen, Yun-Hao Shi, Zhong-Cheng Xiang +9
In this study, we introduce an online public quantum computation platform, named as ScQ, based on a 1D array of a 10-qubit superconducting processor. Single-qubit rotation gates ca…
Multipartite Entanglement in Crossing the Quantum Critical Point
Hao-Yu Sun, Zi-Yong Ge, Heng Fan
We investigate the multipartite entanglement for a slow quantum quench crossing a critical point. We consider the quantum Ising model and the Lipkin-Meshkov-Glick model, which are…
Variational Quantum Computation of Molecular Linear Response Properties on a Superconducting Quantum Processor
Kaixuan Huang, Xiaoxia Cai, Hao Li +12
Simulating response properties of molecules is crucial for interpreting experimental spectroscopies and accelerating materials design. However, it remains a long-standing computati…
A full circuit-based quantum algorithm for excited-states in quantum chemistry
Jingwei Wen, Zhengan Wang, Chitong Chen +7
Utilizing quantum computer to investigate quantum chemistry is an important research field nowadays. In addition to the ground-state problems that have been widely studied, the det…
Quantum simulation of Hawking radiation and curved spacetime with a superconducting on-chip black hole
Yun-Hao Shi, Run-Qiu Yang, Zhongcheng Xiang +10
Hawking radiation is one of the quantum features of a black hole that can be understood as a quantum tunneling across the event horizon of the black hole, but it is quite difficult…
Observation of Emergent Gauge Invariance in a Superconducting Circuit
Zhan Wang, Zi-Yong Ge, Zhongcheng Xiang +8
Lattice gauge theories (LGTs) are one of the most fundamental subjects in many-body physics, and has recently attracted considerable research interests in quantum simulations. Here…
Thermal variational quantum simulation on a superconducting quantum processor
Xue-Yi Guo, Shang-Shu Li, Xiao Xiao +10
Solving finite-temperature properties of quantum many-body systems is generally challenging to classical computers due to their high computational complexities. In this article, we…