The struggle against the sign problem

26 Jun 2017, 09:20


Philippe de Forcrand (ETH Zurich & CERN)


The 'sign problem', i.e. the presence of configurations with negative or complex weight in the partition sum, has been a technical obstacle of growing importance, which prevents the Monte Carlo study of many systems of physical interest, among them QCD in 'extreme' parameter regimes. I will recall some basic notions about the sign problem, and review current attempts to overcome it.

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