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Zoekopdracht: journal id: "physicsxlettersxb"

AuteursJ. Ambjørn, P. Białas, J. Jurkiewicz, Z. Burda, B. Petersson
TitelEffective sampling of random surfaces by baby universe surgery
TijdschriftPhysics Letters B
FaculteitFaculteit der Natuurwetenschappen, Wiskunde en Informatica
Instituut/afd.FNWI: Institute for Theoretical Physics (ITF)
SamenvattingWe propose a new, very efficient algorithm for sampling of random surfaces in the Monte Carlo simulations, based on so-called baby universe surgery, i.e. cutting and pasting of baby universe. It drastically reduces slowing down as compared to the standard local flip algorithm, thereby allowing simulations of large random surfaces coupled to matter fields. As an example we investigate the efficiency of the algorithm for 2d simplicial gravity interacting with a one-component free scalar field. The radius of gyration is the slowest mode in the standard local flip/shift algorithm. The use of baby universe surgery decrease the autocorrelation time by three order of magnitude for a random surface of 0.5 · 105 triangles, where it is found to be τint = 150 ± 31 sweeps.
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