Nonequilibrium-current-induced corrections to the one-particle-correlationfunction in a wire

Electron gas in a wire connected to two terminals with potential drop is st udied with the Schwinger-Keldysh formalism. Recent studies, where the curre nt is enforced to flow with a Lagrange-multiplier term, demonstrated that t he current enhances the one-particle-correlation function. We report that i n our model, such enhancement is not guaranteed to occur, but conditional b oth on the potential drop and the positions where we observe the correlatio n function. That is, under a certain condition, spatially modulated pattern is formed in the wire owing to the nonequilibrium current. (C) 2000 Publis hed by Elsevier Science B.V.