Approaches to the sign problem in lattice field theory

By C. Gattringer, K. Langfeld. 2016

138 citations recorded by the source corpus.

Quantum field theories (QFTs) at finite densities of matter generically involve complex actions. Standard Monte-Carlo simulations based upon importance sampling, which have been producing quantitative first principle results in particle physics for almost fourty years, cannot be applied in this case. Various strategies to overcome this so-called Sign Problem or Complex Action Problem were proposed during the last thirty years. We here review the sign problem in lattice field theories, focussing on two more recent methods: Dualization to world-line type of representations and the density-of-states approach.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Geophysics

View Paper: https://www.semanticscholar.org/paper/e1e4ae12639659e1cf2e17b68a9b66c3bec75e2a

Citations in the corpus

• Heavy quarkonium in extreme conditions (2019, unknown): “[54]).”