Publications (64)
Quantum coherence and geometric quantum discord
Ming-Liang Hu, Xueyuan Hu, Jie-Ci Wang +3
Quantum coherence and quantum correlations are of fundamental and practical significance for the development of quantum mechanics.They are also cornerstones of quantum computation…
Global quantum discord and quantum phase transition in XY model
Si-Yuan Liu, Yu-Ran Zhang, Wen-Li Yang +1
We study the relationship between the behavior of global quantum correlations and quantum phase transitions in XY model. We find that the two kinds of phase transitions in the stud…
Majorization relation in quantum critical systems
Lin-Ping Huai, Yu-Ran Zhang, Si-Yuan Liu +3
The most basic local conversion is local operations and classical communications (LOCC), which is also the most natural restriction in quantum information processing. We investigat…
One-way deficit and quantum phase transitions in model and extended Ising model
Yao-Kun Wang, Yu-Ran Zhang, Heng Fan
Originating in questions regarding work extraction from quantum systems coupled to a heat bath, quantum deficit, a kind of quantum correlations besides entanglement and quantum dis…
Quantum-enhanced metrology for multiple phase estimation with noise
Jie-Dong Yue, Yu-Ran Zhang, Heng Fan
We present a general framework to study the simultaneous estimation of multiple phases in the presence of noise as a discretized model for phase imaging. This approach can lead to…
Interplay between disorder and topology in Thouless pumping on a superconducting quantum processor
Yu Liu, Yu-Ran Zhang, Yun-Hao Shi +24
Topological phases are robust against weak perturbations, but break down when disorder becomes sufficiently strong. However, moderate disorder can also induce topologically nontriv…
Observation and Modulation of the Quantum Mpemba Effect on a Superconducting Quantum Processor
Yueshan Xu, Cai-Ping Fang, Bing-Jie Chen +33
In non-equilibrium quantum systems, the quantum Mpemba effect (QME) emerges as a counterintuitive phenomenon: systems exhibiting greater initial symmetry breaking restore symmetry…
Non-Hermitian sensing from the perspective of post-selected measurements
Neng Zeng, Tao Liu, Keyu Xia +2
By employing the Naimark dilation, we establish a fundamental connection between non-Hermitian quantum sensing and post-selected measurements. The sensitivity of non-Hermitian quan…
Variational generation of spin squeezing on one-dimensional quantum devices with nearest-neighbor interactions
Zheng-Hang Sun, Yong-Yi Wang, Yu-Ran Zhang +2
Efficient preparation of spin-squeezed states is important for quantum-enhanced metrology. Current protocols for generating strong spin squeezing rely on either high dimensionality…
Time-correspondence differential ghost imaging
Ming-Fei Li, Yu-Ran Zhang, Kai-Hong Luo +2
Experimental data with digital masks and a theoretical analysis are presented for an imaging scheme that we call time-correspondence differential ghost imaging (TCDGI). It is shown…
Arbitrary Control of Non-Hermitian Skin Modes via Disorder and An Electric Field
Zhao-Fan Cai, Yang Li, Yu-Ran Zhang +4
The non-Hermitian skin effect (NHSE), characterized by the accumulation of a macroscopic number of bulk states at system boundaries, is a hallmark of non-Hermitian physics. However…
Metrological characterisation of non-Gaussian entangled states of superconducting qubits
Kai Xu, Yu-Ran Zhang, Zheng-Hang Sun +12
Multipartite entangled states are significant resources for both quantum information processing and quantum metrology. In particular, non-Gaussian entangled states are predicted to…
Global Precision Limits in Critical Quantum Metrology: From Cramér-Rao to Ziv-Zakai
Neng Zeng, Tao Liu, Yu-Ran Zhang
Critical quantum metrology with equilibrium states predicts quantum-enhanced sensitivity only in the vicinity of criticality, where large prior information about the parameter is r…
Programmable spectral symmetries in an anisotropic quantum Rabi simulator
Jia-Cheng Song, Yu Liu, Ming-Chuan Wang +28
The quantum Rabi model captures fundamental aspects of light--matter interaction, where symmetry dictates both spectra and dynamics. Over the past years, experiments have explored…
Experimental valley qubit state tomography and coherence induced uncertainty relations in monolayer WSe
Yu-Ran Zhang, Jing Wang, Chuanrui Zhu +2
Velleytronics as a new electronic conception is an emerging exciting research field with wide potential applications, which is attracting great research interests for their extraor…
Quantifying Coherence in Infinite Dimensional Systems
Yu-Ran Zhang, Lian-He Shao, Yongming Li +1
We study the quantification of coherence in infinite dimensional systems, especially the infinite dimensional bosonic systems in Fock space. We show that given the energy constrain…
Quantum simulation of topological zero modes on a 41-qubit superconducting processor
Yun-Hao Shi, Yu Liu, Yu-Ran Zhang +21
Quantum simulation of different exotic topological phases of quantum matter on a noisy intermediate-scale quantum (NISQ) processor is attracting growing interest. Here, we develop…
Multipartite distribution property of one way discord beyond measurement
Si-Yuan Liu, Yu-Ran Zhang, Wen-Li Yang +1
We investigate the distribution property of one way discord in multipartite system by introducing the concept of polygamy deficit for one way discord. The difference between one wa…
General monogamy property of global quantum discord and the application
Si-Yuan Liu, Yu-Ran Zhang, Li-Ming Zhao +2
We provide a family of general monogamy inequalities for global quantum discord (GQD), which can be considered as an extension of the usual discord monogamy inequality. It can be s…
Noisy Probabilistic Error Cancellation and Generalized Physical Implementability
Tian-Ren Jin, Kai Xu, Yu-Ran Zhang +1
Decoherence severely limits the performance of quantum processors, posing challenges to reliable quantum computation. Probabilistic error cancellation, a quantum error mitigation m…
Second-Order Topological Phases in Non-Hermitian Systems
Tao Liu, Yu-Ran Zhang, Qing Ai +4
A -dimensional second-order topological insulator (SOTI) can host topologically protected -dimensional gapless boundary modes. Here we show that a 2D non-Hermitian SOTI…
Observation of a superradiant phase transition with emergent cat states
Ri-Hua Zheng, Wen Ning, Ye-Hong Chen +15
Superradiant phase transitions (SPTs) are important for understanding light-matter interactions at the quantum level, and play a central role in criticality-enhanced quantum sensin…
Probing Operator Spreading via Floquet Engineering in a Superconducting Circuit
S. K. Zhao, Zi-Yong Ge, Zhongcheng Xiang +16
Operator spreading, often characterized by out-of-time-order correlators (OTOCs), is one of the central concepts in quantum many-body physics. However, measuring OTOCs is experimen…
Deterministic one-way logic gates on a cloud quantum computer
Zhi-Peng Yang, Alakesh Baishya, Huan-Yu Ku +6
One-way quantum computing is a promising candidate for fault-tolerant quantum computing. Here, we propose new protocols to realize a deterministic one-way CNOT gate and one-way …
Quantifying quantum non-Markovianity based on quantum coherence via skew information
Lian-He Shao, Yu-Ran Zhang, Yu Luo +2
Based on the nonincreasing property of quantum coherence via skew information under incoherent completely positive and trace-preserving maps, we propose a non-Markovianity measure…
A Double-Threshold Technique for Fast Time-Correspondence Imaging
Ming-Fei Li, Yu-Ran Zhang, Xue-Feng Liu +4
We present a robust imaging method based on time-correspondence imaging and normalized ghost imaging (GI) that sets two thresholds to select the reference frame exposures for image…
Quantum Metrology via Repeated Quantum Nondemolition Measurements in "Photon Box"
Yu-Ran Zhang, Jie-Dong Yue, Heng Fan
In quantum metrology schemes, one generally needs to prepare copies of entangled particles, such as entangled photon states, and then they are detected in a destructive pro…
Observation of thermalization and information scrambling in a superconducting quantum processor
Qingling Zhu, Zheng-Hang Sun, Ming Gong +22
Understanding various phenomena in non-equilibrium dynamics of closed quantum many-body systems, such as quantum thermalization, information scrambling, and nonergodic dynamics, is…
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…
Zeno dynamics in quantum open systems
Yu-Ran Zhang, Heng Fan
Quantum Zeno effect shows that frequent observations can slow down or even stop the unitary time evolution of an unstable quantum system. This effect can also be regarded as a phys…
Observation of strong and weak thermalization in a superconducting quantum processor
Fusheng Chen, Zheng-Hang Sun, Ming Gong +22
We experimentally study the ergodic dynamics of a 1D array of 12 superconducting qubits with a transverse field, and identify the regimes of strong and weak thermalization with dif…
Prethermalization by Random Multipolar Driving on a 78-Qubit Superconducting Processor
Zheng-He Liu, Yu Liu, Gui-Han Liang +43
Time-dependent drives hold the promise of realizing non-equilibrium many-body phenomena that are absent in undriven systems. Yet, drive-induced heating normally destabilizes the sy…
Operation triggered quantum clock synchronization
Jie-Dong Yue, Yu-Ran Zhang, Heng Fan
We present a novel quantum clock synchronization(QCS) scheme of multiple parties which uses operation as the trigger to start the evolution of the initial state, where existing QCS…
Demonstration of Entanglement-Enhanced Phase Estimation in Solid
Gang-Qin Liu, Yu-Ran Zhang, Yan-Chun Chang +3
Precise parameter estimation plays a central role in science and technology. The statistical error in estimation can be decreased by repeating measurement, leading to that the resu…
High-order topological pumping on a superconducting quantum processor
Cheng-Lin Deng, Yu Liu, Yu-Ran Zhang +21
High-order topological phases of matter refer to the systems of -dimensional bulk with the topology of -th order, exhibiting -dimensional boundary modes and can be cha…
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…
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…
Observation of energy resolved many-body localization
Qiujiang Guo, Chen Cheng, Zheng-Hang Sun +10
Many-body localization (MBL) describes a quantum phase where an isolated interacting system subject to sufficient disorder displays non-ergodic behavior, evading thermal equilibriu…
Simulating Chern insulators on a superconducting quantum processor
Zhong-Cheng Xiang, Kaixuan Huang, Yu-Ran Zhang +16
The quantum Hall effect, fundamental in modern condensed matter physics, continuously inspires new theories and predicts emergent phases of matter. Here we experimentally demonstra…
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…
Generalized Entanglement of Purification Criteria for 2-Producible States in Multipartite Systems
Tian-Ren Jin, Yu-Ran Zhang, Heng Fan
Multipartite entanglement has a much more complex structure than bipartite entanglement. A state that lacks generic multipartite entanglement is 2-producible, i.e. it can be writte…
Coherence susceptibility as a probe of quantum phase transitions
Jin-Jun Chen, Jian Cui, Yu-Ran Zhang +1
We introduce a coherence susceptibility method, based on the fact that it signals quantum fluctuations, for identifying quantum phase transitions, which are induced by quantum fluc…
Operation Mpemba effect: Breakdown of resource-Markovianity of free dynamics
Tian-Ren Jin, Yu-Ran Zhang, Heng Fan
The Mpemba effect refers to faster relaxation of states that are initially farther from equilibrium, yet its characterization is often tied to a chosen distance or resource measure…
Complementary relation of quantum coherence and quantum correlations in multiple measurements
Zeyang Fan, Yi Peng, Yu-Ran Zhang +3
Quantum coherence and quantum correlations lie in the center of quantum information science, since they both are considered as fundamental reasons for significant features of quant…
Experimental testing of entropic uncertainty relations with multiple measurements in pure diamond
Jian Xing, Yu-Ran Zhang, Shang Liu +4
One unique feature of quantum mechanics is the Heisenberg uncertainty principle, which states that the outcomes of two incompatible measurements cannot simultaneously achieve arbit…
Quantum Metrological Bounds for Vector Parameter
Yu-Ran Zhang, Heng Fan
Precise measurement is crucial to science and technology. However, the rule of nature imposes various restrictions on the precision that can be achieved depending on specific metho…
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…
Topological band theory for non-Hermitian systems from the Dirac equation
Zi-Yong Ge, Yu-Ran Zhang, Tao Liu +3
We identify and investigate two classes of non-Hermitian systems, i.e., one resulting from Lorentz-symmetry violation (LSV) and the other from a complex mass (CM) with Lorentz inva…
Discrete time crystals in one-dimensional classical Floquet systems with nearest-neighbor interactions
Zhuo-Yi Li, Yu-Ran Zhang
Prethermal discrete time crystals (PDTCs), an emergent non-equilibrium phase of matter, have been studied in two- and higher-dimensional lattices with nearest-neighbor (NN) interac…
Recovery of damaged information via scrambling in indefinite casual order
Tian-Ren Jin, Tian-Ming Li, Zheng-An Wang +3
Scrambling prevents the access to local information with local operators and therefore can be used to protect quantum information from damage caused by local perturbations. Even th…
The Geometry of Quantum Coherence for Two Qubit States
Yao-Kun Wang, Lian-He Shao, Yu-Ran Zhang
We plot the geometry of several distance-based quantifiers of coherence for Bell-diagonal states. We find that along with both norm and relative entropy of coherence change…
Metrological detection of multipartite entanglement through dynamical symmetries
Yu-Ran Zhang, Franco Nori
Multipartite entanglement, characterized by the quantum Fisher information (QFI), plays a central role in quantum-enhanced metrology and understanding quantum many-body physics. Wi…
Criterion on remote clocks synchronization within a Heisenberg scaling accuracy
Yong-Liang Zhang, Yu-Ran Zhang, Liang-Zhu Mu +1
We propose a quantum method to judge whether two spatially separated clocks have been synchronized within a specific accuracy . If the measurement result of the experiment is o…
Anderson Delocalization in Strongly Coupled Disordered Non-Hermitian Chains
Wei-Wu Jin, Jin Liu, Xin Wang +7
Disorder and non-Hermitian effects together can upend how waves localize. In a 1D disordered chain, the non-Hermitian skin effect (NHSE) can induce Anderson delocalization, defying…
Observation of Bloch Oscillations and Wannier-Stark Localization on a Superconducting Processor
Xue-Yi Guo, Zi-Yong Ge, Hekang Li +9
The Bloch oscillation (BO) and Wannier-Stark localization (WSL) are fundamental concepts about metal-insulator transitions in condensed matter physics. These phenomena have also be…
Suppressed Energy Relaxation in the Quantum Rabi Model at the Critical Point
Ye-Hong Chen, Zhi-Cheng Shi, Yu-Ran Zhang +2
We derive a modified master equation for the quantum Rabi model in the parameter regime where quantum criticality can occur. The modified master equation can avoid some unphysical…
Dynamics of quantum coherence in many-body localized systems
Jin-Jun Chen, Kai Xu, Li-Hang Ren +2
We demonstrate that the dynamics of quantum coherence serves as an effective probe for identifying dephasing, which is a distinctive signature of many-body localization (MBL). Quan…
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…
Experimental Observation of Topological Disclination States in Lossy Electric Circuits
Jin Liu, Wei-Wu Jin, Zhao-Fan Cai +6
Topological phase transitions can be remarkably induced purely by manipulating gain and loss mechanisms, offering a novel approach to engineering topological properties. Recent the…
Probing spin hydrodynamics on a superconducting quantum simulator
Yun-Hao Shi, Zheng-Hang Sun, Yong-Yi Wang +20
Characterizing the nature of hydrodynamical transport properties in quantum dynamics provides valuable insights into the fundamental understanding of exotic non-equilibrium phases…
Nonmesonic Quantum Many-Body Scars in a 1D Lattice Gauge Theory
Zi-Yong Ge, Yu-Ran Zhang, Franco Nori
We investigate the meson excitations (particle-antiparticle bound states) in quantum many-body scars of a 1D lattice gauge theory coupled to a dynamical spin-$\frac{…
Characterizing Many-body Dynamics with Projected Ensembles on a Superconducting Quantum Processor
Zhiguang Yan, Zi-Yong Ge, Rui Li +3
Quantum simulators offer a new opportunity for the experimental exploration of non-equilibrium quantum many-body dynamics, which have traditionally been characterized through expec…
Versatile Control of Nonlinear Topological States in Non-Hermitian Systems
Zhao-Fan Cai, Yu-Chun Wang, Yu-Ran Zhang +2
The non-Hermitian skin effect (NHSE) and nonlinearity can both delocalize topological modes (TMs) from the interface. However, the NHSE requires precise parameter tuning, while non…
Phase diagram of quantum critical system via local convertibility of ground state
Si-Yuan Liu, Quan Quan, Jin-Jun Chen +3
We investigate the relationship between two kinds of ground-state local convertibility and quantum phase transitions in XY model. The local operations and classical communications…