Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Correlation potential of the keKS Δvcke (continuous curve) and KS system Δvc (dashed curve) for the two-site case as a function of the interaction strength U/t. Apart from a small region at vanishing interaction strength U, |Δvcke| < |Δvc|.
