Adiabatic charge pumping rice-mele model

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August undefined, 2024

WebAug 31, 2024 · (a) Rice-Mele model. (b) Sketch of the protocol for charge pumping in the parameter space of the Rice-Mele model. (c) Transported charge as a function of angle ϕ in the Δ − (t 1 − t 2) plane for different values of L. The path for the pump is parameterized as t 1 = 1 − 0.5 cos ϕ, t 2 = 1 + 0.5 cos ϕ, and Δ = 2 / 3 sin ϕ. (d) The ... WebOct 7, 2024 · Abstract We study the Rice-Mele (RM) model in the presence of an asymmetric hopping-induced non-Hermitian parameter, γ. In particular, we examine the effect of non-Hermiticity on the...

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WebIn this study, the Landau-Zener (LZ) transition method is applied to investigate a weak non-adiabatic effect on the Zak phase and the topological charge pumping in the Rice-Mele model. The non-adiaba WebFeb 23, 2016 · It is known as the Rice-Mele (RM) model. No full-text available ... For systems in 1D protected by chiral or particle-hole symmetries the Zak phase is a … chiropodist holmfirth

Adiabatic Charge Pumping, Rice-Mele Model Semantic Scholar

WebMar 9, 2024 · Our findings show that despite its topological nature, this phenomenon is not generically robust to nonadiabatic effects. Indeed, we find that the Floquet diagonal … WebThe concrete system we use in this chapter is the simplest adiabatic charge pump, obtained by adding staggered onsite potential to the SSH model. It is known as the … WebJan 11, 2024 · Model. To illustrate the topological photonic pumping in our microwave waveguide platform, we take advantage of the celebrated Rice-Mele model 57,59.Two essential factors of the Rice-Mele pump ... graphic image fountain city

Thouless pumping in disordered photonic systems Light

Two-Dimensional Chern Insulators: The Qi-Wu-Zhang Model

WebThe concrete system we use in this chapter is the simplest adiabatic charge pump, obtained by adding staggered onsite potential to the SSH model. It is known as the Rice-Mele (RM) model. We apply the Berry phase and the Chern number to show that the periodically and slowly changing the parameters of a one-dimensional solid, it is possible … Web(b) Adiabatic potentials for N = 3 0 λ/6 3 2 −4 −2 0 2 4 Energy, E/E R 2 0 1 (c) Tight binding model s-band p-band (d) Unraveled Rice-Mele model FIG. 1. Lattice concept. (a) Experimental geometry with a single-frequency Raman beam traveling along e x and N Raman laser beams sharing the same spatial mode traveling along −e x. The level graphic image examplesWebAdiabatic circuits are low-power electronic circuits which use "reversible logic" to conserve energy. The term "adiabatic" refers to an ideal thermodynamic process in which no heat … graphic image for coming soon

"WebFeb 22, 2016 · The present approach uses noninteracting lattice models of topological insulators, building gradually on these to arrive from the simplest one-dimensional case (the Su-Schrieffer-Heeger model for... " - Adiabatic charge pumping rice-mele model

Adiabatic charge pumping rice-mele model

Thouless pumping in disordered photonic systems Light ... - Nature

WebIn this study, the Landau-Zener (LZ) transition method is applied to investigate a weak non-adiabatic effect on the Zak phase and the topological charge pumping in the Rice-Mele … WebIn a Thouless pump, an integer amount of charge is pumped per pump cycle when adiabatically changing parameters such that a degeneracy (or critical point) is …

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Webcharge pump. As the input code varies from 0 to 255, the DAC output ranges rail-to-rail, changing approximately 40mV per step. With a +5V input (VCC) applied to IC1 and a -3V … WebJul 27, 2024 · The standard realization for Thouless pumping 1, 2 is the time-periodic version of the Rice-Mele (RM) model 3, which describes a dimerized tight-binding chain whose system parameters change...

WebOct 19, 2024 · The adiabatic pump protocol that we choose is the Rice–Mele model 42, which is a bipartite array generated by periodically modulating the on-site energies and … WebApr 7, 2024 · Motivated by this progress, we study the effects of static disorder on topological Thouless charge pumping. We focus on the half-filled Rice-Mele model of …

Web1.Charge pumping protocol. 拓扑泵浦是一种系统的hopping term在周期性绝热循环（adiabatic）中导致的charge pumping process，最直观的表现形式就是Wannier Center在实空间的移动，表现为移动一个晶格常数的距离。为什么随时间周期性绝热演化的hopping会 … WebApr 29, 2024 · We employ real-time simulations in finite and infinite systems to calculate the adiabatic charge and spin transport, complemented by the analysis of gaps and the …

WebFeb 23, 2016 · In this chapter we construct two-dimensional insulators with nonvanishing Chern numbers, by promoting the time t in a an adiabatic pump cycle on a one-dimensional insulator, to a wavenumber k y . This construction not only gives us control over the Chern number, but also brings with it edge states.

WebAdiabatic charge pumping, Rice-Mele model.- Current operator and particle pumping.- Two-dimensional Chern insulators - the Qi-Wu-Zhang model.- Continuum model of localized states at a domain wall.- Time-reversal symmetric two-dimensional topological insulators - the Bernevig-Hughes-Zhang model.-The Z2 invariant of two-dimensional … graphic image for saleWebJul 27, 2024 · We employ real-time simulations in finite and infinite systems to calculate the adiabatic charge and spin transport, complemented by the analysis of gaps and the many-body polarization to confirm the adiabatic nature of the pump. chiropodist holtWebThe adiabatic component, charge pump, is placed away from the critical paths. The adiabatic delays are overlapped with the computing path logic delays resulting in no … chiropodist home visits graphic image for north starThe most straightforward way to operate a charge pump in the Rice-Mele model is to make sure that the system falls apart at all times to disconnected dimers. This will happen if at any time either the intercell hopping amplitude w , or the intracell hopping amplitude v vanishes. See more According to the result (3.13), the Wannier center positions of a certain band, in units of the lattice constant, are given by the Berry phase of that band divided by … See more Our above results for the smoothly modulated Rice-Mele cycle suggest the interpretation that during a complete cycle, each electron in the filled valence band is … See more So far, the discussed results were obtained for the special case of the smoothly modulated Rice-Mele pumping cycle with average intracell hopping \bar{v} = 1. … See more So far, we have the following picture of an adiabatic pump in a long open chain. If we take a cross section at the middle of the chain, a single particle will be … See more graphic image filesWebFigure 2(c) shows the current and pumped charge for pumping cycle T ¼ 40@=E R in the Rice-Mele pumping potential (the band gap is 1:5E R). The sudden onset of pumping causes high frequency oscillations of the current. The pumpedchargeis quantized at times that are multiples of the cycle time T. Our calculations show that modifying graphic image groupWebJun 27, 2024 · Panel (b): the energy bands for Rice-Mele Hamiltonian for different values of m, = jt1jj t2jin the 1st Brillouin Zone. The critical point is found at m = 0 and = 0. Panel (c): the pumped charge Q after the completion of a full adiabatic cycle is the winding number around the critical point in the parameter space of the Rice-Mele model. need to ... chiropodist honley