The frequency-dependent exchange-correlation potential, which appears in the usual Kohn-Sham formulation of a time-dependent linear response problem, is a strongly nonlocal functional of the density,… (More)

It is shown that the exchange-correlation part of the action functional A xc [ρ(r, t)] in time-dependent density functional theory , where ρ(r, t) is the time-dependent density, is invariant under… (More)

We investigate transresistance effects in electron-hole double-layer systems with an excitonic condensate. Our theory is based on the use of a minimum dissipation premise to fix the current carried… (More)

Currents in the compressible and incompressible regions of the two-dimensional electron gas We derive a general expression for the low-temperature current distribution in a two-dimensional electron… (More)