Slow quench in ssh model

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August undefined, 2024

WebbIn condensed matter physics, the Su–Schrieffer–Heeger (SSH) model is a one-dimensional lattice model that presents topological features. It was devised by Wu-Pei … Webb4 dec. 2024 · We demonstrate that, for any parameter quench performed on the half-filled SSH chain, the occupancy of each lattice site remains locked to $1/2$ at any time, due to …

Topological edge states in the Su-Schrieffer-Heeger model

WebbInstitute of Physics Webb4 apr. 2024 · We study the quench dynamics of noninteracting fermionic quantum many-body systems that are subjected to Markovian drive and dissipation and are described by a quadratic Liouvillian which has parity-time (PT) symmetry. In recent work, we have shown that such systems relax locally to a maximum entropy ensemble that we have dubbed … graph streaming processor

Winding Number and SSH Model - GitHub Pages

Webb17 juni 2024 · In the nonreciprocal SSH model, we find that while a topologically nontrivial post-quench system always imply DQPTs following the quench, the reverse may not be true in general, and possible reasons behind such an … Webb10 nov. 2024 · Here we study the slow quench dynamics in two paradigmatic models of classical statistical mechanics, {viz.}, one-dimensional kinetic Ising model and mean … WebbWe are interested in the quench dynamics of the SSH model { t<0 : H^ = H^ <(q <;q 0 <) ; t>0 : H^ = H^ >(q >;q 0 >) : (2.4) In what follows, we take j Rito be the ground state of H^ )j Ri. More explicitly, let f graph striver

[PDF] Quantum quenches in driven-dissipative quadratic fermionic ...

Phys. Rev. B 106, 134203 (2024) - Kibble-Zurek behavior in one ...

Webb21 apr. 2024 · Specifically, we find that dynamical quantum phase transition relies on the existence of massless propagating quasiparticles as signaled by their impact on the … Webb2 feb. 2024 · In the slow quench performed over a timeτ, we ﬁnd that the excitation energy generated has a remarkable intermediate-τnonanalytic power-law dependence,τ−ηwithη<1, which seemingly masks the dynamical manifestation of … graphs trendsWebb10 dec. 2024 · The SSH model is described by the Hamiltonian (1) H ˆ = ∑ l [ q ( a l † b l † + b l † a l †) + q ′ ( a l + 1 † b l † + b l † a l + 1 †)], where a l ( b l) destroys a fermion on site-l of sublattice- A ( B ), and q ( q ′) is the intracell (intercell) tunneling matrix element. graph stretch calculator

"Webbeld Ising model was studied in [19] and for periodic driving in [20]. The Behaviors of CC were explored for the Bose-Hubbard model in [21,22] and for the in nite range Lipkin-Meshkov-Glick (LMG) model in [23]. On the other hand, the time evolution of CC under a quantum quench and its comparison with entanglement measures " - Slow quench in ssh model

Slow quench in ssh model

Phys. Rev. B 106, 134203 (2024) - Kibble-Zurek behavior in one ...

Webb12 dec. 2024 · Studying whether these transitions are robust, we find, in the paradigmatic case of the SSH model, that they persist for both quantum quench protocols of finite duration in time as well as thermal initial states, while they are washed out in the presence of fermion-fermion interactions and for finite system size. Webb4 maj 2015 · The only way to close the bulk gap in the SSH model is to tune δ t to zero. As long as δ t ≠ 0, the bulk gap (which is proportional to δ t ) is always open, no matter how many edges you cut open or how many edge modes you have.

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Webb8 mars 2010 · Basically the session is slow to start because the SSH server is trying to lookup the hostname of the SSH client and for whatever reason it's timing out (e.g., it …

WebbSSH模型简单来说可以理解为电子在一列一位的点阵上跃迁，有两种不同的幅度交替排列分别用 v,w 表示胞内和胞外跃迁幅度，为了方便我们将每个元胞中处在左边的格点用 A 表示，处在右边的用 B 表示书上的图在不考虑电子相互作用的情况下，可以写出单电子的哈密顿量 \hat {H}=v\sum_ {m=1}^N ( m,B\rangle\langle m,A + m,A\rangle\langle … Webb(a) Quench in the SSH model and (b) the single-particle ES dynamics. The red solid and blue dashed curves correspond to L = ∞ and L = 2l, respectively. In the former case, the …

WebbThe inversion symmetry in the SSH model (equivalently, reflection symmetry or 180-degree rotation symmetry) is best understood by taking Fig. 1 and flattening it out as in Fig. 5 … Webb24 apr. 2024 · Contribute to yuralandau/Dynamic-Chern-Number-in-SSH-Model development by creating an account on GitHub. Skip to content Toggle navigation. Sign up Product Actions. Automate any workflow ... Li L, Chen S. Dynamical topological invariant after a quantum quench[J]. Physical Review B, American Physical Society, 2024, 97(6): …

Webb10 okt. 2024 · We study the critical phenomena in the one-dimensional Su-Schrieffer-Heeger (SSH) model by investigating the inhomogeneities in the local winding number in …

http://albi3ro.github.io/M4/WindingNumber.html graph stretch and shrinkWebb15 maj 2024 · The deviations from the ground-state spin Hall conductivity as a function of the quench time follow the Kibble-Zurek scaling. We also consider the breaking of the … chiswell barrett winstonWebbAnalytically, we know that the two eigenvalues occur at: s e e Q A H E p o s t The difference between the upper and lower band will be at it’s minimum when cos k is greatest, k = 0 . So when v = w, the gap closes. This v = w line in parameter space could separate two different topological phases. chisweet molassesWebb10 nov. 2024 · While a large number of studies have focused on the nonequilibrium dynamics of a system when it is quenched instantaneously from a disordered phase to an ordered phase, such dynamics have been relatively less explored when the quench occurs at a finite rate. Here we study the slow quench dynamics in two paradigmatic models of … chiswell and coWebb30 maj 2024 · The Su–Schrieffer–Heeger (SSH) model perhaps is the easiest and the most basic model for topological excitations. Many variations and extensions of the SSH … graph stretched horizontallyWebbAbstract. The topological phase of the Su-Schrie er-Heeger (SSH) model is known to exhibit two edge states that are topologically protected by the chiral symmetry. We demonstrate … graph stretched verticallyWebb7 dec. 2024 · Model of atomic SSH chain composed of N sites on the insulating surface (which can stand for a gate electrode). The nearest-neighbor couplings between sites are denoted by V and W and the couplings with the left and right electrodes represent symbols. chi sweet home anime