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Topological dynamical quantum phase transition in a quantum skyrmion phase

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arxiv 2303.06977 v2 pith:R6VGBHXS submitted 2023-03-13 cond-mat.str-el quant-ph

classification cond-mat.str-elquant-ph
keywords phasequantumdynamicalskyrmiontopologicaltransitionferromagnetichelical
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Quantum skyrmionic phase is modelled in a 2D helical spin lattice. This topological skyrmionic phase retains its nature in a large parameter space before moving to a ferromagnetic phase. Next nearest-neighbour interaction improves the stability and it also causes a shift of the topological phase in the parameter space. Nonanalytic behaviour of the rate function observed, when the system which is initially in a quantum skyrmion phase is quenched to a trivial quantum ferromagnetic phase, indicates a dynamical quantum phase transition. Dynamical quantum phase transition is absent when the system initially in a skyrmion phase is quenched to a helical phase.

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