15 citations · 25 across the 7 of their papers we have counts for
7 papers
Phase Transition in Conditional Curie-Weiss Model
Alex A. Opoku, Kwame Owusu Edusei, Richard Ansah
This paper proposes a conditional Curie-Weiss model as a model for opinion formation in a society polarized along two opinions, say opinions 1 and 2. The model comes with interacti…
Pinning of a random walk by a random walk: proof of a conjecture
Frank den Hollander, Alex A. Opoku
In [3] the radius of convergence of the generating function of the collision local time of two independent copies of an irreducible, symmetric and transient random walk on Zd, d \g…
Copolymer with pinning: variational characterization of the phase diagram
Frank den Hollander, Alex A. Opoku
This paper studies a polymer chain in the vicinity of a linear interface separating two immiscible solvents. The polymer consists of random monomer types, while the interface carri…
A copolymer near a selective interface: variational characterization of the free energy
E. Bolthausen, F. den Hollander, A. A. Opoku
In this paper we consider a two-dimensional copolymer consisting of a random concatenation of hydrophobic and hydrophilic monomers near a linear interface separating oil and water…
Discrete approximations to vector spin models
A. C. D. van Enter, C. Kuelske, A. A. Opoku
We strengthen a result of two of us on the existence of effective interactions for discretised continuous-spin models. We also point out that such an interaction cannot exist at ve…
Gibbs-non-Gibbs properties for n-vector lattice and mean-field models
A. C. D. van Enter, C. Kuelske, A. A. Opoku +1
We review some recent developments in the study of Gibbs and non-Gibbs properties of transformed n-vector lattice and mean-field models under various transformations. Also, some ne…