2 papers
math-ph2026
Arbitrary harmonic functions as Bose--Einstein condensates
Michiel De Wilde, Robert Seiringer
We show that a suitable choice of boundary conditions for the Laplacian allows for the appearance of an an arbitrary number of condensates, described by arbitrary harmonic function…
quant-ph2025
Classification of locality preserving symmetries on spin chains
Alex Bols, Wojciech De Roeck, Michiel De Wilde +1
We consider the action of a finite group by locality preserving automorphisms (quantum cellular automata) on quantum spin chains. We refer to such group actions as ``symmetries…