Modifying partition functions: A way to solve the sign problem

Modifying partition functions: A way to solve the sign problem

A possible method to solve the sign problem is developed by modifying the original theory. Considering several modifications of the partition function, the observable in the original theory is reconstructed from the identity connecting the observables in the original and modified theories. We demons...

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Veröffentlicht in:Physical review. D 2017-11, Vol.96 (9), Article 094511
Hauptverfasser: Doi, Takahiro M., Tsutsui, Shoichiro
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Partitions
Partitions (mathematics)
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Tsutsui, Shoichiro
description A possible method to solve the sign problem is developed by modifying the original theory. Considering several modifications of the partition function, the observable in the original theory is reconstructed from the identity connecting the observables in the original and modified theories. We demonstrate that our method gives the correct results, even if the original theory has the severe sign problem, by using a simple one-dimensional integral.
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title Modifying partition functions: A way to solve the sign problem
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