Slow quench in ssh model
Webb10 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. Webb29 aug. 2024 · The Su-Schrieffer-Heeger (SSH) model on a two-dimensional square lattice exhibits a topological phase transition which is related to the Zak phase determined by bulk band topology. The strong modulation of electron hopping causes nontrivial charge polarization even in the presence of inversion symmetry. The energy band structures and …
Slow quench in ssh model
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Webb17 jan. 2024 · The Su--Schrieffer--Heeger (SSH) model is one of the simplest topological lattice models and is a promising candidate for quantum simulations of topological systems. In this study we investigate an interacting SSH model with nearest-neighbor interactions using mean field theory and an exact diagonalization method after the … 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 …
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 … WebbThe topological phase of the Su-Schrieffer-Heeger (SSH) model is known to exhibit two edge states that are topologically protected by the chiral symmetry. 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 the additional time-reversal and …
WebbAnalytically, 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. 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.
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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 … how many rows is 1 gbWebb17 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 … how did 42 originate as a weed holidayWebb10 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 … how many rows of hand tied extensionsWebb(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 … how did 4 20 become weed dayWebbInstitute of Physics how did 666 become satan\u0027s numberWebb4 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 … how did 90s music influence on societyWebb30 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 … how did 911 change airport security