A5100382279- Cold Atom Physics and Bose-Einstein Condensates
- Topological Materials and Phenomena
- Quantum many-body systems
- Quantum Mechanics and Non-Hermitian Physics
- Nonlinear Photonic Systems
- Quantum chaos and dynamical systems
- Quantum, superfluid, helium dynamics
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Strong Light-Matter Interactions
- Theoretical and Computational Physics
- Rare-earth and actinide compounds
- Mechanical and Optical Resonators
- Force Microscopy Techniques and Applications
- Physics of Superconductivity and Magnetism
- Graphene research and applications
- Geometric Analysis and Curvature Flows
- Quantum Information and Cryptography
- Quasicrystal Structures and Properties
- Thermodynamic and Structural Properties of Metals and Alloys
- GaN-based semiconductor devices and materials
- Atomic and Subatomic Physics Research
- Complex Network Analysis Techniques
- Nuclear physics research studies
- Advanced Chemical Physics Studies
South China Normal University
2016-2025
Physikalisch-Technische Bundesanstalt
2008-2024
University of Science and Technology of China
2021-2022
Henan Normal University
2021-2022
Huaqiao University
2022
Nanjing University
2015-2019
Nanjing General Hospital of Nanjing Military Command
2018-2019
South China University of Technology
2017
Guangxi University
2015
Beijing Institute of Technology
2006-2013
We investigate the entanglement dynamics of non-Hermitian Aubry-Andr\'e-Harper chain. The results reveal that by increasing quasiperiodic strength, a phase transition occurs from area law induced skin effect to arising Anderson localization. For former, entropy follows nonmonotonic process, i.e., it increases first, then oscillates, and finally converges stable value while, for latter, remains low because wave function is not expandable in Anderson's localization region. early-stage behavior...
Non-Hermitian quantum many-body systems are a fascinating subject to be explored. Using the generalized density matrix renormalisation group method and complementary exact diagonalization, we elucidate ground states dynamics of 1D interacting non-Hermitian Aubry-Andre-Harper model for bosons. We find stable in superfluid Mott insulating regimes under wide range conditions this model. reveal skin state induced by non-Hermiticity from nonreciprocal hopping. investigate topology phase its...
The mobility edge, as the critical energy separating extended and localized states, is an important concept in Anderson localization theory. However, how edge works non-Hermitian systems has not yet been revealed. Here, through Avila's global theory, authors prove that will develop into a ring structure complex plane. Combined with numerical calculations, it convincing of rings universal quasiperiodic systems.
We study a cluster Ising model with non-Hermitian external field which can be exactly solved in the language of free fermions. By investigating second derivative energy density and fidelity, possible new critical points are tentatively located. The string order parameter staggered magnetization then detected to reveal emergent phases brand characteristics. To categorize exotic phase transitions induced by non-Hermiticity, we calculate variation mode spin-correlation function as well...
We investigate the properties of mobility edge in an Aubry-André-Harper model with nonreciprocal long-range hopping.The results reveal that there can be a new type featuring both strength-dependent and scale-free properties.By calculating fractal dimension, we find positions edges are robust to strength non-reciprocal hopping.Furthermore, through scale analysis observables such as eigenenergy eigenstate, etc., show four different specific observed system.This paper extends family tree...
We investigate the non-Abelian Thouless pumping in a disorder tunable Lieb chain with degenerate flat bands. The results reveal that quasiperiodic will cause topological phase transition from trivial (without pumping) to nontrivial (with phase. underlying mechanism is monopole originally outside region can be driven into due introduction of disorder. Moreover, since corresponding turn nodal line spread beyond boundaries region, system large strength result disappearance pumping. Furthermore,...
The Lyapunov exponent, serving as an indicator of the localized state, is commonly utilized to identify localization transitions in disordered systems. In non-Hermitian quasicrystals, effect induced by nonreciprocal hopping can lead manifestation two distinct exponents on opposite sides center. Building this observation, we here introduce a comprehensive approach for examining characteristics and mobility edges referred asymmetric transfer matrix analysis. We demonstrate application method...
We systematically investigate the non-Hermitian generalisations of Landau-Zener (LZ) transition and Landau-Zener-St\"{u}ckelberg (LZS) interferometry. The LZ probabilities, or band populations, are calculated for a generic model their asymptotic behaviour analysed. then focus on systems with real adiabatic parameter study LZS interferometry formed out two identical avoided level crossings. Four distinctive cases identified analytic formulae probabilities each case. differences similarities...
Out-of-time-ordered correlators (OTOCs) are an effective tool in characterizing black hole chaos, many-body thermalization, and quantum dynamics instability. Previous research findings have shown that the OTOCs' exponential growth (EG) marks limit for systems. However, we report this paper a periodically-modulated nonlinear Schr\"odinger system, which interestingly find way of growth: super-EG. We show OTOCs, stems from chaotic dynamics, will increase super-exponential way. also classical...
Previous studies have established that quasiperiodic lattice models with unbounded potentials can exhibit localized and multifractal states, yet preclude the existence of extended states. In this work, we introduce a system incorporates both hopping amplitudes, where states emerge as direct consequence terms overcoming localization constraints imposed by potential, thereby facilitating enhanced particle transport. By using Avila's global theory, derive analytical expressions for phase...
We investigate the dynamics of Weyl quasiparticles emerged in an optical lattice where topological semimental and trivial band insulator phases can be adjusted with on-site energy. The evolution density distribution is demonstrated to have anomalous velocity but a steady Zitterbewegung effect insulator. Our analysis demonstrates that Chern number chirality system directly determined from positions atomic center-of-mass. Furthermore, amplitude period relativistic oscillations are shown...
We explore the topological properties of double-Weyl semimetals with cold atoms in optical lattices. first propose to realize a tight-binding model simulating semimetal pair points by engineering atomic hopping three-dimensional lattice. show that charges \$pm2$ behave as sink and source Berry flux momentum space connecting two Fermi arcs they are stabilized \$C_{4h}$ point-group symmetry. By applying realizable \$C_4$ breaking term, we find each point splits into single-Weyl obtain rich...
We propose a controlled-PHASE gate for neutral atoms in which one of the qubit state components adiabatically evolves along multiple-atom eigenstate formed by chirped laser pulse coupling to Rydberg states and intrinsic dipole-dipole exchange interactions and, consequently, accumulates an interaction-induced geometric phase. The is not limited adiabatic condition, sped up shortcuts adiabaticity (STA). Analyses show that STA scheme more robust than non-adiabatic case against variations...
PTB has developed a new contact based method for the traceable calibration of normal stiffness AFM cantilevers in range from 0.03 N m−1 to 300 SI units on micro-electro-mechanical system (MEMS) actuators. This is evaluated by comparing measured cantilever with that PTB's primary nanonewton force facility and microforce measuring device. The MEMS was used calibrate two case studies. One set applications biophysics calibrated using well-known thermal vibration second manufacturer who applied...
In this work, we investigate the quantum phase transition in a non-Hermitian XY spin chain. The diagram shows that critical points of Ising expand into zone after introducing effect. By analyzing gap and long-range correlation function, one can distinguish different phases by means features decay properties tricky problem traditional model. Furthermore, results reveal relationship among regions diagram, energy function.
In this letter, we investigate the effects of non-Hermitian driving on quantum coherence in a bipartite system. The results that dynamical localization destroyed by Hermitian interaction revives are an evidence restoration driving. Besides, entanglement between two subsystems also decays with boosting non-hermitian strength, which provides another will protect coherence. physics behind phenomenon is domination quasieigenstate maximum imaginary value quasieigenvalue dynamics Our discovery...
We investigate Zitterbewegung (ZB) of the ultracold atoms in a tunable honeycomb optical lattice. By tuning parameters lattice one can realize merging two Dirac points. The process points into hybrid point implies topological phase transition from semimetallic to band insulator phase. After merging, it presents linear-quadratic dispersion relation which is linear direction and quadric other orthogonal direction. show that ZB occurs isotropically before but only after merging. Furthermore, we...