Topological charge pumping

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August undefined, 2024

WebJul 12, 2024 · We study the quantized charge pumping of higher-order topological insulators (HOTIs) with edge-corner correspondences based on the combination of the rotation of in-plane magnetic field and... WebJan 3, 2024 · As an important class of topological systems, topological pumping has garnered great interest both theoretically and experimentally, since it connects the underlying topological features of...

Topological charge pumping in a one-dimensional optical …

WebJan 18, 2016 · In the quantum pump, the pumped charge is connected to the two-dimensional topological invariant, the Chern number ν, which was first introduced in the context of the integer quantum Hall effect ... WebJan 30, 2013 · A topological charge pump [1] transfers charge in a quantized fashion. The quantization is stable against the detailed form of the pumping protocols and external … link to make online bseed payments

Topological pumping in Aharonov–Bohm rings Communications …

WebConstruction will be underway in January 2024 for both the pump station and force main. After site work and erosion control are completed at the pump station site, excavation for … WebCharge pumping (CP) is a very sensitive characterization method of interface traps. The gate is repeatedly pulsed from inversion (where the minority carriers are trapped on the interface states) to accumulation (where the trapped carriers recombine with majority carriers). The carrier recombination results in CP current in the body terminal ... Webtopological charge pumping by calculating its Chern number and ab initio simulation of the pumping process. Compared with the corresponding classical dynamics, we show that quantum effects are crucial for the topological protection of the quantized charge pumping. We then con-sider the effect of a harmonic trap and predict the topo- hours plato\u0027s closet

Phys. Rev. B 104, 155126 (2024) - Topological charge pumping in

Topological charge and spin pumping in a semiconductor nanowire

WebApr 20, 2016 · An extended research has confirmed the equivalence between topological properties and quantized charge pumping of a continuous Rice–Mele pump. In this section, we study the pumping effect of two sinusoidal SAWs with different spatial period but the same temporal frequency. The two SAWs have the same acoustic velocity. WebOct 18, 2024 · Quasiperiodic systems are a class of materials with long-range order but no translational symmetry. While they are an interesting platform for novel topological … link to meeting in teamsWebApr 29, 2024 · It is important to clarify whether the observed suppression of the charge pumping is the manifestation of a topological phase transition or not. A fundamental property useful to identify... hours petsmart 85383

"WebJan 18, 2016 · Charge transport in a cyclically time-modulated periodic potential, also known as a topological Thouless pump, has been realized in an ultracold gas of fermionic atoms. … " - Topological charge pumping

Topological charge pumping

Quantized charge-pumping in higher-order topological insulators

WebNov 1, 2024 · The adiabatic topological pumping is proposed by periodically modulating a semiconductor nanowire double-quantum-dot chain. We demonstrate that the quantized … WebJan 28, 2024 · @article{osti_1803826, title = {Topological charge pumping in twisted bilayer graphene}, author = {Zhang, Yinhan and Gao, Yang and Xiao, Di}, abstractNote = {In this work, we show that a sliding motion between the two layers of a moiré superlattice induces an electric current and realizes a two-dimensional version of the topological Thouless pump …

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WebRealization of such a topological charge pump serves as a firm step towards exploring topological states and non-equilibrium dynamics using cold atoms. Introduction Charge … WebOct 18, 2024 · The topological pumping through the two branches forming the anti-crossing is bound to be characterized by two different mechanisms: Pumping through the upper (lower) branch occurs via...

WebJun 16, 2024 · The adiabatic topological pumping is proposed by periodically modulating a semiconductor nanowire double-quantum-dot chain. We demonstrate that the quantized … WebThese solutions, known as instantons or multi-instantons, realize a mapping of the three-dimensional sphere at infinity on the gauge group, and the topological charge is the …

WebDec 1, 2024 · Quantum pumping is a dynamic transport mechanism that dc charge currents can flow in the absence of any applied bias voltage via a quantum system, in which some parameters are periodically modulated in time. WebOct 19, 2024 · Thouless charge pumping protocols provide a route for one-dimensional systems to realize topological transport. Here, using arrays of evanescently coupled optical waveguides, we...

WebFeb 15, 2024 · Abstract. Recent experiments demonstrated deeply subwavelength lattices using atoms with N internal states Raman coupled with lasers of wavelength λ. The …

WebPHYSICAL REVIEW A107, 023309 (2024) Topological charge pumping with subwavelength Raman lattices D. Burba , 1M. Raciˇ unas¯ , I. B. Spielman ,2 ,3 * and G. Juzeliunas¯ 1,† 1Institute of Theoretical Physics and Astronomy, Vilnius University, Saul˙etekio 3, LT-10257 Vilnius, Lithuania 2Joint Quantum Institute, University of Maryland, College Park, Maryland … hours plumbingWebTopological charge pumping enables the transport of charge through an adiabatic cyclic evolution of the underlying Hamiltonian. In contrast to classical transport, the transported charge is quantized and purely determined by the topology of the pump cycle, making it robust to perturbations. link to message on facebookWebRice-Mele Model: Thouless Charge Pump. [1]: %matplotlib notebook. [2]: import numpy as np from scipy import sparse from scipy.sparse import bsr, csr_matrix from scipy.sparse.bsr import bsr_matrix from typing import List import scipy.linalg as … link to meeting notes in teamsWebOct 28, 2024 · Recent experiments with ultracold quantum gases have successfully realized integer-quantized topological charge pumping in optical lattices. Motivated by this progress, we study the effects of static disorder on topological Thouless charge pumping. link to message me on teamsWebMore parameters: charge pumping Thouless pumps and winding invariant Quantum Hall effect: pumping electrons in Landau levels Quantum Hall effect: edge states ... This mapping has nontrivial topological properties … link to meter conversionWebA topological charge pump Two experiments with ultracold fermionic and bosonic atoms in optical superlattices demonstrate the quantized charge transport predicted by Thouless in the 1980s . Roberta Citro! J1 a b J2 dS dL " (2!) x (dL) 0.5 0.25 0! 1 0 1 Classical Quantum Figure !1 Illustration of the superlattice and pumping scheme . a, A ... link to message facebook pageWebJun 16, 2024 · The topological charge pumping is demonstrated by simulating the Rice-Mele model on a periodic double-quantum-dot chain, and manifested by the gapless edge states in a finite chain with open ... link to meaning