Collapse of randomly self-interacting polymers

Y. Kantor, M. Kardar

Research output: Contribution to journalArticlepeer-review


We use complete enumeration and Monte Carlo techniques to study self-avoiding walks with random nearest-neighbor interactions described by v0 qi qj, where qi = ± 1 is a quenched sequence of “charges” on the chain. For equal numbers of positive and negative charges (N+ = N), the polymer with v0 > 0 undergoes a transition from self-avoiding behavior to a compact state at a temperature θ≈ 1.2v0. The collapse temperature θ(x) decreases with the asymmetry x = |N+ - N|/(N+ + N) and vanishes at x≈ 0.6. For v0 < 0, a θ-point is present at all x.

Original languageEnglish
Pages (from-to)169-174
Number of pages6
JournalEurophysics Letters
Issue number3
StatePublished - 20 Oct 1994


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