![]() |
COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring. | ![]() |
University of Cambridge > Talks.cam > Theory of Condensed Matter > Interplay of disorder and interactions in 1d cold fermi gases
![]() Interplay of disorder and interactions in 1d cold fermi gasesAdd to your list(s) Download to your calendar using vCal
If you have a question about this talk, please contact Antonio Miguel Garcia-Garcia <amg73. The wide controllability of the physical parameters in cold atoms have made it possible to experimentally investigate various concepts in quantum many-body physics. Identifying and understanding the many-body phases in the strongly correlated regime have been a challenge both for theorists and experimentalists. The real-time dynamics of such systems have been observed experimentally and is expected to provide better understanding of the phase structure. Even in one-dimensional systems where many powerful theoretical methods exist, the effect of interparticle interaction on the localization of bosonic atoms in disordered potential remains controversial. Here we study a related problem of the interacting spin-1/2 fermions in a lattice with the site energy modified by a quasiperiodic potential, which works as a disorder. The density-matrix renormalization group (DMRG) method allows numerically exact study of the ground state properties of one-dimensional lattice systems of interacting atoms. We find that a short-range attractive interaction induces localization [1]. By the time-dependent DMRG , we also study the real-time evolution of the system close to the “metal”-insulator transition after a trap potential is removed while the quasiperiodic potential is kept on. We analyze the critical exponents of the diffusion process and compare the results against the non-interacting cases and the mean-field predictions [2]. [1] M. Tezuka and A. M. Garcia-Garcia: Phys. Rev. A 82, 043613 (2010). [2] A. M. Garcia-Garcia and M. Tezuka: in preparation. This talk is part of the Theory of Condensed Matter series. This talk is included in these lists:
Note that ex-directory lists are not shown. |
Other listsGordon Lab Seminar Series Other medicinal chemistry symposia Machine Learning and Inference (One day meeting)Other talks'Ways of Reading, Looking, and Imagining: Contemporary Fiction and Its Optics' Zoo and Wildlife Work Cafe Synthetique- AI and Automation: Revolutionising Biology Uncertainty Quantification of geochemical and mechanical compaction in layered sedimentary basins Epigenetics: One Genome, Multiple Phenotypes On the elastic-brittle versus ductile fracture of lattice materials Immigration and Freedom Disease Migration 'The Japanese Mingei Movement and the art of Katazome' Glucagon like peptide-1 receptor - a possible role for beta cell physiology in susceptibility to autoimmune diabetes A feast of languages: multilingualism in neuro-typical and atypical populations How does functional neuroimaging inform cognitive theory? |