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Topological charge pumping

WebPHYSICAL REVIEW B102, 245123 (2024) Nonlinear optical control of chiral charge pumping in a topological Weyl semimetal M. Mehdi Jadidi,1 ,* Mehdi Kargarian ,2 ,† Martin Mittendorff,3 4 Yigit Aytac,3 5 Bing Shen,6 Jacob C. König-Otto,7 Stephan Winnerl,7 Ni Ni,6 Alexander L. Gaeta,1 Thomas E. Murphy ,3 and H. Dennis Drew8,‡ 1Department of Applied … WebFeb 15, 2024 · Abstract. Recent experiments demonstrated deeply subwavelength lattices using atoms with N internal states Raman coupled with lasers of wavelength λ. The …

Topological charge and spin pumping in a semiconductor nanowire

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... 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 ... tofu aufs brot https://fourseasonsoflove.com

Topological charge pumping in twisted bilayer graphene

WebMar 7, 2024 · We establish a connection between the collective dynamics of the pillars and that of electrons in a magnetic field by deriving an accurate tight-binding model and developing a WKB-type analysis... WebApr 25, 2024 · Laughlin argued that changing the axial magnetic flux would result in a current along the axial direction such that charges would be pumped along the cylinder’s … 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 … tofu at aldi

Topological Charge Pumping with Cold Atoms - NASA/ADS

Category:Topological Charge Pumping with Cold Atoms - NASA/ADS

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Topological charge pumping

Charge Pumping - an overview ScienceDirect Topics

WebOct 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. 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 …

Topological charge pumping

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WebJun 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 ... WebJan 18, 2016 · Topological charge pumping enables the transport of charge through an adiabatic cyclic evolution of the underlying Hamiltonian. In contrast to classical transport, …

WebA 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 ... 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-

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. … 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 7, 2024 · Electron pumping through energy-gapped systems is restricted for vanishing local density of states at the Fermi level. In this paper, we propose a topological …

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. tofu at walmartWebRice-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 … tofu at homeWebOct 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... people living off grid in alaska