Path integral Monte Carlo calculation of momentum distribution in solid He-4

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To access the full text documents, please follow this link: http://hdl.handle.net/2117/13196

dc.contributor	Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear
dc.contributor	Universitat Politècnica de Catalunya. SIMCON - Grup de Recerca de Simulació per Ordinador en Matèria Condensada
dc.contributor.author	Rota, Riccardo
dc.contributor.author	Boronat Medico, Jordi
dc.date	2011-02
dc.identifier.citation	Rota, R.; Boronat, J. Path integral Monte Carlo calculation of momentum distribution in solid He-4. "Journal of low temperature physics", Febrer 2011, vol. 162, núm. 3-4, p. 146-153.
dc.identifier.citation	0022-2291
dc.identifier.citation	10.1007/s10909-010-0249-5
dc.identifier.uri	http://hdl.handle.net/2117/13196
dc.language.iso	eng
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Informàtica::Aplicacions de la informàtica::Aplicacions informàtiques a la física i l‘enginyeria
dc.subject	Àrees temàtiques de la UPC::Física::Física de l'estat sòlid
dc.subject	Supersolids
dc.subject	Bose-Einstein condensation
dc.subject	Path integral Monte Carlo
dc.subject	Momentum distribution
dc.subject	Supersòlids
dc.title	Path integral Monte Carlo calculation of momentum distribution in solid He-4
dc.type	info:eu-repo/semantics/submittedVersion
dc.type	info:eu-repo/semantics/article
dc.description.abstract	We perform calculations of the momentum distribution n(k) in solid 4He by means of path integral Monte Carlo methods.We see that, in perfect crystals, n(k)does not depend on temperature T and that is different from the classical Gaussian shape of the Maxwell-Boltzmann distribution, even though these discrepancies decrease when the density of the system increases. In crystals presenting vacancies, we see that for T ≥ 0.75 K, n(k) presents the same behavior as in the perfect crystal, but, at lower T , it presents a peak when k→0.
dc.description.abstract	Peer Reviewed

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