A5059644830- Quantum many-body systems
- Magnetic and transport properties of perovskites and related materials
- Rare-earth and actinide compounds
- Quantum and electron transport phenomena
- Theoretical and Computational Physics
- Quantum Computing Algorithms and Architecture
- Advanced Thermodynamics and Statistical Mechanics
- Advanced Condensed Matter Physics
- Opinion Dynamics and Social Influence
- Ocean Waves and Remote Sensing
Peking University
2019-2023
A large body of knowledge about magnetism is attained from models interacting spins, which usually reside on magnetic ions. Proposals beyond the ionic picture are uncommon and seldom verified by direct observations in conjunction with microscopic theory. Here, using inelastic neutron scattering to study itinerant near-ferromagnet MnSi, we find that system's fundamental units interconnected, extended molecular orbitals consisting three Mn atoms each rather than individual atoms. This result...
We investigate the approach of time-dependent variational principle (TDVP) for one-dimensional spin-$J$ PXP model with detuning, which is relevant programmable Rydberg atom arrays. The manifold chosen as minimally entangled $\mathbb{Z}_K$ matrix-product-states (MPS). demonstrate that dynamics and error can be expressed rapidly convergent series in thermodynamic limit. In particular, $J=1/2$ limiting case $J\rightarrow \infty$, TDVP results become exact significantly simplified.
Abstract We investigate the mixed-state entanglement between two spins embedded in XXZ Heisenberg chain under thermal equilibrium. By deriving an analytical expression for of two-spin states and extending this analysis to larger spin chains, we demonstrate that mixedstate is profoundly shaped by both disorder temperature. Our results reveal a sharp distinction many-body localized (MBL) ergodic phases, with vanishing above different finite temperature thresholds. Furthermore, analyzing...
We propose a generalization of the quantum entropy introduced by Wigner and von Neumann [Z. Phys. 57, 30 (1929)]. Our is applicable to both pure states mixed states. When dimension $N$ Hilbert space large, this generalized Wigner--von (GWvN) becomes independent choices basis asymptotically equal $lnN$ in sense typicality. The dynamic evolution our also typical, reminiscent H theorem proved Neumann. For composite system, GWvN typically additive; for microcanonical ensemble, it equivalent...