On simulating complex actions

Gyan Bhanot, Andreas Gocksch, Pietro Rossi

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We describe and compare various methods to numerically simulate measures that are non-positive definite. We argue that variations of importance sampling will fail for large enough volume but some type of Riemann integration scheme might work. Using exact results for the three-dimensional Ising model, we show that to get anything distinguishable from noise, the phase of the measure must be known extremely precisely. We suggest that a recent method to compute the density of states may be the best method to use.

Original languageEnglish (US)
Pages (from-to)101-107
Number of pages7
JournalPhysics Letters B
Issue number1
StatePublished - Dec 10 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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