Polaron-like effects in a one-dimensional optical lattice

Abstract

We study a highly imbalanced Fermi gas in a one-dimensional optical lattice from the polaronic point of view. The time-evolving block decimationg algorithm is used to calculate the ground state and dynamics of the system. We find qualitatively similar polaronic behaviour as in the recent experiment by Schirotzek et al. \cite{Schirotzek2009a} where radio-frequency spectroscopy was used to observe polarons in three-dimensional space. In the weakly interacting limit our exact results are in excellent agreement with a polaron ansatz, and in the strongly interacting limit the results match with an approximative solution of the Bethe ansatz, suggesting a crossover from a quasiparticle to a charge-density excitation regime.

6 pages, 5 figures

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Cited by in corpus (8)

• Fermi gases in one dimension: From Bethe Ansatz to experiments
• Repulsive polarons and itinerant ferromagnetism in strongly polarized Fermi gases
• Polarons and Molecules in a Two-Dimensional Fermi Gas
• Two-component few-fermion mixtures in a one-dimensional trap: numerical versus analytical approach
• Energy and contact of the one-dimensional Fermi polaron at zero and finite temperature
• Polaronic effects in one- and two-band quantum systems
• Chiral polaron formation on the edge of topological quantum matter
• Nonlinear quantum Langevin equations for bosonic modes in solid-state systems