Dynamics of an impurity in a one-dimensional lattice

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • University of Geneva
  • University of Pittsburgh

Kuvaus

We study the non-equilibrium dynamics of an impurity in a harmonic trap that is kicked with a well-defined quasi-momentum, and interacts with a bath of free fermions or interacting bosons in a one-dimensional lattice configuration. Using numerical and analytical techniques we investigate the full dynamics beyond linear response, which allows us to quantitatively characterize states of the impurity in the bath for different parameter regimes. These vary from a tightly bound molecular state in a strongly interacting limit to a polaron (dressed impurity) and a free particle for weak interactions, with composite behaviour in the intermediate regime. These dynamics and different parameter regimes should be readily realizable in systems of cold atoms in optical lattices.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli045018
Sivut1-25
Sivumäärä25
JulkaisuNew Journal of Physics
Vuosikerta15
TilaJulkaistu - huhtikuuta 2013
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Tutkimusalat

  • ultracold quantum gases, impurities, quantum many-body physics, one-dimensional physics

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