Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2012-03-12
Physics
Condensed Matter
Statistical Mechanics
11 pages, 7 figures; references added; improved discussion of ground-state extrapolations
Scientific paper
In this work I apply the improvement procedure of Endres et al., originally conceived to reduce finite lattice spacing effects in transfer matrices for dilute Fermi systems, to tuning operators for the calculation of observables. I construct, in particular, highly improved representations for the energy and the contact, as a first step in an improvement program for finite-temperature calculations. I illustrate the effects of improvement on those quantities with a ground-state lattice calculation at unitarity.
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