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- W4315705540 abstract "We theoretically calculate the density dynamic structure factor of one-dimensional Fermi superfluid with Raman-type spin-orbit coupling, and analyze its main dynamical character during phase transition between Bardeen-Cooper-Schrieffer superfluid and topological superfluid. Our theoretical results display four kinds of single-particle excitations induced by the two-branch structure of single-particle spectrum, and the cross single-particle excitation is much easier to be seen in the spin dynamic structure factor at a small transferred momentum. Also we find a new roton-like collective mode emerges at a fixed transferred momentum $q simeq 2k_F$, and it only appears once the system enters the topological superfluid state. The occurrence of this roton-like excitation is related to switch of global minimum in single-particle spectrum from $k=0$ to $k simeq 2k_F$." @default.
- W4315705540 created "2023-01-12" @default.
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- W4315705540 date "2023-01-12" @default.
- W4315705540 modified "2023-10-15" @default.
- W4315705540 title "Dynamic structure factor of one-dimensional Fermi superfluid with spin-orbit coupling" @default.
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- W4315705540 doi "https://doi.org/10.1103/physreva.107.013304" @default.
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