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Interaction-Induced Multiparticle Bound States in the Continuum.
Phys Rev Lett
October 2024
Institute of Quantum Precision Measurement, State Key Laboratory of Radio Frequency Heterogeneous Integration, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
Article Synopsis
- Bound states in the continuum (BICs) are localized modes within radiation continuum, first predicted for single particles but now general in many wave systems; their application in many-body quantum physics is still largely unexplored.
- Researchers predict a new type of multiparticle state in the Bose-Hubbard model, creating a quasi-BIC that behaves differently under various boundary conditions—appearing as a bound pair influenced by a third particle.
- The study reveals that modulating onsite interactions can realize Thouless pumping of these quasi-BICs, where the overall center of mass shifts while the bound pair moves oppositely in relation to a standing wave.
Response functions for electric field induced two-dimensional nonlinear spectroscopy in a Kitaev magnet.
J Phys Condens Matter
September 2024
Institute for Theoretical Physics, Technical University Braunschweig, D-38106 Braunschweig, Germany.
We study the dynamical response functions relevant for electric field induced two-dimensional (2D) coherent nonlinear optical spectroscopy in a Kitaev magnet at finite temperature. We show that these response functions are susceptible to both types of fractional quasiparticles of this quantum spin-liquid, i.e.
View Article and Find Full Text PDFLithium-ion battery multi-scale modeling coupled with simplified electrochemical model and kinetic Monte Carlo model.
iScience
September 2023
School of Transportation Science and Engineering, Beihang University, Beijing 102206, China.
The multi-scale modeling of lithium-ion battery (LIB) is difficult and necessary due to its complexity. However, it is difficult to capture the aging behavior of batteries, and the coupling mechanism between multiple scales is still incomplete. In this paper, a simplified electrochemical model (SEM) and a kinetic Monte Carlo (KMC)-based solid electrolyte interphase (SEI) film growth model are used to study the multi-scale characteristics of LIBs.
View Article and Find Full Text PDFStark Localization as a Resource for Weak-Field Sensing with Super-Heisenberg Precision.
Phys Rev Lett
July 2023
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610051, China.
Gradient fields can effectively suppress particle tunneling in a lattice and localize the wave function at all energy scales, a phenomenon known as Stark localization. Here, we show that Stark systems can be used as a probe for the precise measurement of gradient fields, particularly in the weak-field regime where most sensors do not operate optimally. In the extended phase, Stark probes achieve super-Heisenberg precision, which is well beyond most of the known quantum sensing schemes.
View Article and Find Full Text PDFClose encounters of the sticky kind: Brownian motion at absorbing boundaries.
Phys Rev E
June 2023
Department of Mathematics, University of Utah, 155 South 1400 East, Salt Lake City, Utah 84112, USA.
Encounter-based models of diffusion provide a probabilistic framework for analyzing the effects of a partially absorbing reactive surface, in which the probability of absorption depends upon the amount of surface-particle contact time. In this paper we develop a class of encounter-based models that deal with absorption at sticky boundaries. Sticky boundaries occur in a diverse range of applications, including cell biology, colloidal physics, finance, and human crowd dynamics.
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