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- W4283711280 abstract "We consider a model for the motion of an impurity interacting with two parallel, one-dimensional (bosonized) fermionic baths. The impurity is able to move along any of the baths, and to jump from one to the other. We provide a perturbative expression for the state evolution of the system when the impurity is injected in one of the baths, with a given wave packet. The nontrivial choice of the unperturbed dynamics makes the approximation formally infinite-order in the impurity-bath coupling, allowing us to reproduce the orthogonality catastrophe. We employ the result for the state evolution to observe the dynamics of the impurity and its effect on the baths, in particular in the case when the wave packet is Gaussian. We observe and characterize the propagation of the impurity along the baths and the hopping between them. We also analyze the dynamics of the bath density and momentum density (i.e. the particle current), and show that fits an intuitive semi-classical interpretation. We also quantify the correlation that is established between the baths by calculating the inter-bath, equal-time spatial correlation functions of both bath density and momentum, finding a complex pattern. We show that this pattern contains information on both the impurity motion and on the baths themselves, and that these can be unveiled by taking appropriate slices of the time evolution." @default.
- W4283711280 created "2022-06-30" @default.
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- W4283711280 date "2022-06-27" @default.
- W4283711280 modified "2023-10-08" @default.
- W4283711280 title "A full view on the dynamics of an impurity coupled to two one-dimensional fermionic baths" @default.
- W4283711280 doi "https://doi.org/10.48550/arxiv.2206.13478" @default.
- W4283711280 hasPublicationYear "2022" @default.
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