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- W2054251750 abstract "Frankfurt Institute for Advanced Studies, D-60438 Frankfurt, Germany(Dated: July 23, 2009)We study a trapped system of fermions with a zero-range two-body interaction using the shell-model Monte Carlo method, providing ab initio results for the low particle number limit wheremean-field theory is not applicable. We present results for the N-body energies as function ofinteraction strength, particle number, and temperature. The subtle question of renormalization ina finite model space is addressed and the convergence of our method and its applicability acrossthe BCS-BEC crossover is discussed. Our findings indicate that very good quantitative results canbe obtained on the BCS side, whereas at unitarity and in the BEC regime the convergence is lessclear. Comparison to N = 2 analytics at zero and finite temperature, and to other calculations inthe literature for N > 2 show very good agreement." @default.
- W2054251750 created "2016-06-24" @default.
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- W2054251750 date "2009-07-23" @default.
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- W2054251750 title "Shell-model Monte Carlo simulations of the BCS-BEC crossover in few-fermion systems" @default.
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- W2054251750 doi "https://doi.org/10.1103/physreva.80.013613" @default.
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