2011/04/30 by Ulrich Ebling, André Eckardt, Andre Eckardt +1
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum many-body systems #Theoretical and Computational Physics #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.84.063607
published as Phys. Rev. A 84, 063607 (2011) · 8 pages, 4 figures
arxiv created 2011/11/02 · openalex publication_date 2011/12/05 · arxiv updated 2011/12/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We investigate theoretically the time evolution of a one-dimensional system of spin-1/2 fermions in a harmonic trap after, initially, a spiral spin configuration far from equilibrium is created. We predict a spin segregation building up in time already for weak interaction under realistic experimental conditions. The effect relies on the interplay between exchange interaction and the harmonic trap, and it is found for a wide range of parameters. It can be understood as a consequence of an effective, dynamically induced long-range interaction that is derived by integrating out the rapid oscillatory dynamics in the trap.