Asymmetry Induced Localization

H. Kohler
2013 Acta Physica Polonica. A  
We consider a two-level system, which couples via non-commuting operators to two independent oscillator baths. When the coupling is symmetric, the renormalized hopping matrix element is nite even for innitely strong coupling strength. The two-level system is in a delocalized phase. For nite coupling strength a localization transition occurs for a critical asymmetry angle, which separates the localized from the delocalized phase. Using the method of ow equations we are able to monitor real time dynamics.
doi:10.12693/aphyspola.124.1053 fatcat:k4oyim4rw5dv7bvqdhhp7k5dcy