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1. Anatomy of a strong residual sign problem on the thimbles / Bloch, Jacques
Using a simple Gaussian-like Ansatz for the phase distribution of a theory with a complex action, we show how the thimble integration for the average phase factor can be plagued by a strong residual sign problem when the phase of the complex integration measure conspires with the constant phase of the integrand along the thimble. [...]
Published in Physical Review D 98 (2018) 10.1103/PhysRevD.98.114502 arXiv:1808.00882

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1 Bloch, J.
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