The stitching method reduces a high-dimensional real-time path integral to low-dimensional integrals and fast Fourier transforms, demonstrated on quantum mechanical barrier potentials.
Quantum field theories on the Lefschetz thimble
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In these proceedings, we summarize the Lefschetz thimble approach to the sign problem of Quantum Field Theories. In particular, we review its motivations, and we summarize the results of the application of two different algorithms to two test models.
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Efficient evaluation of real-time path integrals
The stitching method reduces a high-dimensional real-time path integral to low-dimensional integrals and fast Fourier transforms, demonstrated on quantum mechanical barrier potentials.