Rivat, Sébastien (2025) Still no peace on the lattice. [Preprint]
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Rivat S - Still no peace on the lattice.pdf Download (515kB) |
Abstract
The idea of using lattice methods to provide a mathematically well-defined formulation of realistic effective quantum field theories (QFTs) and clarify their physical content has gained traction in the last decades. In this paper, I argue that this strategy faces a two-sided obstacle: realistic lattice QFTs are (i) too different from their effective continuum counterparts even at low energies to serve as their foundational proxies and (ii) far from reproducing all of their empirical and explanatory successes to replace them altogether. I briefly conclude with some lessons for the foundations of QFT.
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