A5100388078- Topological Materials and Phenomena
- Quantum many-body systems
- Quantum and electron transport phenomena
- Quantum Computing Algorithms and Architecture
- Physics of Superconductivity and Magnetism
- Quantum Information and Cryptography
- Quantum Mechanics and Non-Hermitian Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Advanced Condensed Matter Physics
- Graphene research and applications
- Quantum-Dot Cellular Automata
- Quantum chaos and dynamical systems
- Chaos-based Image/Signal Encryption
- Machine Learning in Materials Science
- Iron-based superconductors research
- Advanced Electron Microscopy Techniques and Applications
- Quantum Mechanics and Applications
- Electromagnetic Scattering and Analysis
- Magnetic properties of thin films
- Advanced Chemical Physics Studies
- Metabolism and Genetic Disorders
- Noncommutative and Quantum Gravity Theories
- Complex Network Analysis Techniques
- Human Mobility and Location-Based Analysis
Peking University
2006-2025
Collaborative Innovation Center of Quantum Matter
2023-2025
Stomatology Hospital
2025
National Health and Family Planning Commission
2023
Cornell University
1997-2021
National University of Defense Technology
2013-2020
Beijing National Laboratory for Molecular Sciences
2020
Sichuan University
2015-2019
University of California, Santa Barbara
2017-2019
Stanford University
2013-2016
Topologically ordered phases are gapped states, defined by the properties of excitations when taken around one another. Here we demonstrate a method to extract statistics and braiding excitations, given just set ground-state wave functions on torus. This is achieved studying Topological Entanglement Entropy (TEE) partitioning torus into two cylinders. In this setting, general considerations dictate that TEE generally differs from in trivial partitions depends chosen ground state. Central our...
Despite rapidly growing interest in harnessing machine learning the study of quantum many-body systems, training neural networks to identify phases is a nontrivial challenge. The key challenge efficiently extracting essential information from Hamiltonian or wave function and turning into an image that can be fed network. When targeting topological phases, this task becomes particularly challenging as are defined terms nonlocal properties. Here, we introduce loop topography (QLT): procedure...
Quantum spin liquids are phases of matter whose internal structure is not captured by a local order parameter. Particularly intriguing critical liquids, where strongly interacting excitations control low energy properties. Here we calculate their bipartite entanglement entropy that characterizes quantum structure. In particular the Renyi S(2) on model wave functions obtained Gutzwiller projection Fermi sea. Although sign positive, can be calculated relatively large systems (>324 spins) using...
After decades of progress and effort, obtaining a phase diagram for strongly correlated topological system still remains challenge. Although in principle one could turn to Wilson loops long-range entanglement, evaluating these nonlocal observables at many points space can be prohibitively costly. With growing excitement over quantum computation comes the need an efficient approach diagrams. Here we machine learning using loop topography (QLT), notion have recently introduced. Specifically,...
Quantum compiling, a process that decomposes the quantum algorithm into series of hardware-compatible commands or elementary gates, is fundamental importance for computing. We introduce an efficient based on deep reinforcement learning compiles arbitrary single-qubit gate sequence gates from finite universal set. It generates near-optimal sequences with given accuracy and generally applicable to various scenarios, independent hardware-feasible set free using ancillary qubits. For...
Topologically ordered states are quantum of matter with topological ground-state degeneracy and quasiparticles carrying fractional numbers statistics. The spin ${\ensuremath{\theta}}_{a}=2\ensuremath{\pi}{h}_{a}$ is an important property a quasiparticle, which the Berry phase obtained in adiabatic self-rotation quasiparticle by $2\ensuremath{\pi}$. For chiral robust edge states, another fundamental state central charge $c$. In this paper we propose approach to compute lattice models defining...
We study entanglement properties of candidate wave functions for SU(2) symmetric gapped spin liquids and Laughlin states. These are obtained by the Gutzwiller projection technique. Using topological entropy $\ensuremath{\gamma}$ as a tool, we establish order in chiral liquid ${\mathbb{Z}}_{2}$ functions, well lattice version state. Our results agree very with field theoretic result $\ensuremath{\gamma}=\mathrm{log}D$ where $D$ is total quantum dimension phase. All calculations done using...
We re-examine the question of quantum oscillations from surface Fermi arcs and chiral modes in Weyl semimetals. By introducing two tools--semiclassical phase-space quantization a numerical implementation layered construction semimetals--we discover several important generalizations to previous conclusions that were implicitly tailored special case identical on top bottom surfaces. show picture fixes an ambiguity previously utilized energy-time approach correctly reproduces numerically...
Abstract The experimental discovery of Weyl semimetals offers unprecedented opportunities to study physics in condensed matters. Unique electromagnetic response such as chiral magnetic effect has been observed and presented by the axial θ E · B term Lagrangian ( are electric field, respectively). But till now, progress this direction is restricted DC regime. Here we report access dynamic regime semimetal NbAs combining internal deformation potential coupled phonons with applied static field....
Although the non-Bloch band theory is a milestone in elaborating bulk energy bands of non-Hermitian systems under open-boundary condition (OBC), vital issues related to multivalued functions remain unsolved. In this paper, we anatomize properties one-dimensional multiband OBC. We put forward energy-band branches (EBBs) settle bands, which become gapped or gapless corresponding disconnected connected EBBs complex plane, where branch points and cuts play crucial role. clarify precise...
Quantum spin liquids (QSLs) are phases of interacting spins that do not order even at the absolute zero temperature, making it impossible to characterize them by a local parameter. In this paper, we review unique view provided quantum entanglement on QSLs. We illustrate crucial role topological entropy in diagnosing non-local QSLs, using specific examples such as chiral liquid. also demonstrate detection anyonic quasi-particles and their braiding statistics entanglement. context gapless...
Weyl fermions are a recently discovered ingredient for correlated states of electronic matter. A key difficulty has been that real materials also contain non-Weyl quasiparticles, and disentangling the experimental signatures proven challenging. Here we use magnetic fields up to 95 T drive semimetal TaAs far into its quantum limit, where only purely chiral 0th Landau levels occupied. We find electrical resistivity be nearly independent field 50 T: unusual conventional metals but consistent...
The authors tackle the issue of interpretability in machine learning topological quantum phases models Chern insulator, ${\mathbb{Z}}_{2}$ and spin liquid. use artificial neural network aided by physical insight underlying feature selection through loop topography to understand network's decision-making criteria each three cases
Open AccessCCS ChemistryRESEARCH ARTICLE1 Oct 20204-Hydroxy-l-Proline as a General Platform for Stereoregular Aliphatic Polyesters: Controlled Ring-Opening Polymerization, Facile Functionalization, and Site-Specific Bioconjugation Jingsong Yuan, Dong Shi, Yi Zhang, Jianhua Lu, Letian Wang, Er-Qiang Chen Hua Lu Yuan Beijing National Laboratory Molecular Sciences, Center Soft Matter Science Engineering, Key of Polymer Chemistry Physics Ministry Education, College Peking University, 100871...
A combinatorial optimization problem becomes very difficult in situations where the energy landscape is rugged, and global minimum locates a narrow region of configuration space. When using quantum approximate algorithm (QAOA) to tackle these harder cases, we find that difficulty mainly originates from QAOA circuit instead cost function. To alleviate issue, selectively dropout clauses defining while keeping function intact. Due nature problems, does not affect solution. Our numerical results...
Non-Hermitian quantum systems exhibit fascinating characteristics such as non-Hermitian topological phenomena and skin effects, yet their studies are limited by the intrinsic difficulties associated with eigenvalue problems, especially in larger higher dimensions. In Hermitian systems, semiclassical theory has played an active role analyzing spectrum, eigenstate, phase, transport properties, etc. Here we establish a complex applicable to analytical continuation of physical variables...
We used mice deficient in neuronal nitric oxide (NO) synthase (nNOS) to specifically investigate the role of NO increase cerebellar blood flow (BF crb ) produced by neural activation. Crus II, a region cortex that receives trigeminal sensory afferents, was activated low-intensity stimulation upper lip (5–25 V, 4–16 Hz) anesthetized mice. BF recorded II using laser-Doppler probe. In wild-type mice, increased 28 ± 3% (25 10 Hz, n = 6). The rise attenuated 73 nNOS -/- ( P < 0.05, increases...
The encrypting time of traditional AES algorithm is too long to meet the need fast encryption. For this point, high-performance computing capability Graphic Processing Unit has become hot issue research. This paper proposes that improved by use GPU's high performance and compared with using CPU. And encryption base on GPU also completed. experiment shows speed based obviously higher than CPU, thus efficiency increased.
This article provides a novel and practical approach for investigating the characteristics of intercity telecommunication network whose overall complete information is unavailable. Using mobile phone call data set covering 4.39 million subscribers registered in particular region, we construct two communication subnets infer whole China. Results confirm that intensity characterized by gravity model. The based on number decreases along distance with scaling exponent 0.5, whereas duration 0.4....