Topological charge pumping
WebApr 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... 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 ...
Topological charge pumping
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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 … 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 …
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 noises and shares the same topological origin as the quantum Hall effect. WebThe charge pumped by this Thouless pump is a topological quantum number and does not depend on a smooth change of parameters. Importantly, this charge pumping shares the same topological origin as the integer quantum Hall effect. In spite of the importance in a topological quantum physics, this Thouless pump has never been realized in any system.
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. WebTopological 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.
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.
WebRice-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 … gothic 3 lctm modWebJan 18, 2016 · Topological charge pumping enables the transport of charge through an adiabatic cyclic evolution of the underlying Hamiltonian. In contrast to classical transport, … gothic 3 kostenlos downloadenWebOct 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. chikis $2 meal in covington laWebJan 12, 2024 · Here, we show that in excitonic insulators with s-wave electron-hole pairing, an applied electric field (either pulsed or static) can induce a p-wave component to the order parameter, and further drive it to rotate in the s + ip plane, realizing a Thouless charge pump. chikis beautyWebFeb 15, 2024 · Abstract. Recent experiments demonstrated deeply subwavelength lattices using atoms with N internal states Raman coupled with lasers of wavelength λ. The … gothic 3 lago teleportsteinWebOct 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... chikis store panamaWebJun 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 ... chikis fiestas infantiles