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- W3103643249 abstract "We study the behaviour of quasi-one-dimensional (quasi-1D) Bose gases by Monte Carlo techniques, i.e. by the variational Monte Carlo, the diffusion Monte Carlo and the fixed-node diffusion Monte Carlo techniques. Our calculations confirm and extend our results of an earlier study (Astrakharchik et al 2003 Preprint cond-mat/0308585). We find that a quasi-1D Bose gas (i) is well described by a 1D model Hamiltonian with contact interactions and renormalized coupling constant; (ii) reaches the Tonks–Girardeau regime for a critical value of the 3D scattering length a3D; (iii) enters a unitary regime for |a3D| → ∞, where the properties of the gas are independent of a3D and are similar to those of a 1D gas of hard-rods and (iv) becomes unstable against cluster formation for a critical value of the 1D gas parameter. The accuracy and implications of our results are discussed in detail." @default.
- W3103643249 created "2020-11-23" @default.
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- W3103643249 date "2004-03-24" @default.
- W3103643249 modified "2023-09-27" @default.
- W3103643249 title "Quantum Monte Carlo study of quasi-one-dimensional Bose gases" @default.
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- W3103643249 doi "https://doi.org/10.1088/0953-4075/37/7/066" @default.
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