J. Björnberg

activity

20122025

most citedCritical temperature of Heisenberg models on regular trees, via random loops

7 citations · 10 across the 5 of their papers we have counts for

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math-ph2025

Dimerization in $O (n)$ -invariant quantum spin chains

J. E. Björnberg, K. Ryan

We establish dimerization in $O (n)$ -invariant quantum spin chains with large enough $n$ , in a much larger region of the phase diagram than previous results. This entails identifyin…

math.PR2025

A random recursive tree model with doubling events

Jakob E. Björnberg, Cécile Mailler

We introduce a new model of random tree that grows like a random recursive tree, except at some exceptional "doubling events" when the tree is replaced by two copies of itself atta…

Dimerization in O(n)-invariant quantum spin chains

A random recursive tree model with doubling events

Dimerization in $O (n)$ -invariant quantum spin chains