Ultracold atoms at unitarity within quantum Monte Carlo
arXiv:0910.0720 · doi:10.1103/PhysRevA.81.033619
Abstract
Variational and diffusion quantum Monte Carlo (VMC and DMC) calculations of the properties of the zero-temperature fermionic gas at unitarity are reported. The ratio of the energy of the interacting to the non-interacting gas for a system of 128 particles is calculated to be 0.4517(3) in VMC and 0.4339(1) in the more accurate DMC method. The spherically-averaged pair-correlation functions, momentum densities, and one-body density matrices are very similar in VMC and DMC, but the two-body density matrices and condensate fractions show some differences. Our best estimate of the condensate fraction of 0.51 is a little smaller than values from other quantum Monte Carlo calculations.
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Cited by in corpus (27)
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- Momentum Distribution and Contact of the Unitary Fermi gas
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- Effective-Range Dependence of Resonantly Interacting Fermions
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- Critical temperature and superfluid gap of the Unitary Fermi Gas from Functional Renormalization
- Precision benchmark calculations for four particles at unitarity
- Effective-range dependence of resonant Fermi gases
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- Neural Wave Functions for Superfluids
- Superfluid Condensate Fraction and Pairing Wave Function of the Unitary Fermi Gas
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- High-fidelity pseudopotentials for the contact interaction
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- Double roton-minima in bosonic fractional quantum Hall states
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