Part A Fermi LiquidsNo Access

GROUND-STATE PROPERTIES OF SMALL ³He DROPS FROM QUANTUM MONTE CARLO SIMULATIONS

Departament de Física i Enginyeria Nuclear, Campus Nord B4-B5, Universitat Politècnica de Catalunya, E-08034 Barcelona, Spain

Search for more papers by this author

JOAQUIM CASULLERAS

Departament de Física i Enginyeria Nuclear, Campus Nord B4-B5, Universitat Politècnica de Catalunya, E-08034 Barcelona, Spain

Search for more papers by this author

, and

JORDI BORONAT

Departament de Física i Enginyeria Nuclear, Campus Nord B4-B5, Universitat Politècnica de Catalunya, E-08034 Barcelona, Spain

Search for more papers by this author

https://doi.org/10.1142/S021797920704352XCited by:1 (Source: Crossref)

Abstract

We present recent results from a diffusion Monte Carlo study of small ³He drops in the limit of zero temperature. Using the same methodology than in previous calculations carried out for bulk ³He, we have obtained accurate results for their energy and structure properties. A relevant concern of this analysis has been the determination of the stability threshold for self binding. Our results show that the smallest self-bound drop is formed by N = 30 atoms, with preferred orbitals for open shells corresponding to maximum value of the spin. The quality of the upper bound energies provided by the fixed node approximation is analyzed by performing released-node estimations for short released times. Possible improvements of the nodal surface by including BCS-like correlation functions are also discussed.

Keywords:

You currently do not have access to the full text article.
Recommend the journal to your library today!

References

See special number of J. Chem. Phys. 115, 10065 (2001) . Google Scholar
M. Barrancoet al., J. Low Temp. Phys. 142, 1 (2006), DOI: 10.1007/s10909-005-9267-0. Crossref, Web of Science, ADS, Google Scholar
S. Grebenev, J. P. Toennies and A. F. Vilesov, Science 279, 2083 (1998), DOI: 10.1126/science.279.5359.2083. Crossref, Web of Science, Google Scholar
V. R. Pandharipande, S. C. Pieper and R. B. Wiringa, Phys. Rev. B 34, 4571 (1986), DOI: 10.1103/PhysRevB.34.4571. Crossref, Web of Science, ADS, Google Scholar
J. Harmset al., Phys. Rev. B 63, 184513 (2001), DOI: 10.1103/PhysRevB.63.184513. Crossref, Web of Science, Google Scholar
S. Stringari and J. Treiner, J. Chem. Phys. 87, 5021 (1987), DOI: 10.1063/1.452818. Crossref, Web of Science, ADS, Google Scholar
R. Guardiola and J. Navarro, Phys. Rev. Lett. 84, 1144 (2000), DOI: 10.1103/PhysRevLett.84.1144. Crossref, Web of Science, ADS, Google Scholar
R. Guardiola and J. Navarro, Phys. Rev. A 71, 035201 (2005), DOI: 10.1103/PhysRevA.71.035201. Crossref, Web of Science, Google Scholar
M. Barranco, J. Navarro and A. Poves, Phys. Rev. Lett. 78, 4729 (1997), DOI: 10.1103/PhysRevLett.78.4729. Crossref, Web of Science, ADS, Google Scholar
E. Sola, J. Boronat and J. Casulleras, Phys. Rev. B 73, 092515 (2006), DOI: 10.1103/PhysRevB.73.092515. Crossref, Web of Science, Google Scholar
J. B. Anderson, J. Chem. Phys. 63, 1499 (1975), DOI: 10.1063/1.431514. Crossref, Web of Science, ADS, Google Scholar
D. M. Ceperley and B. J. Alder, Phys. Rev. Lett. 45, 566 (1980), DOI: 10.1103/PhysRevLett.45.566. Crossref, Web of Science, ADS, Google Scholar
J. Casulleras and J. Boronat, Phys. Rev. Lett. 84, 3121 (2000), DOI: 10.1103/PhysRevLett.84.3121. Crossref, Web of Science, ADS, Google Scholar
V. Grau, J. Boronat and J. Casulleras, Phys. Rev. Lett. 89, 045301 (2002), DOI: 10.1103/PhysRevLett.89.045301. Crossref, Web of Science, Google Scholar
J. P. Bouchaud and C. Luhillier, Europhys. Lett. 3, 1273 (1987); Z. Phys. B 75, 283 (1989) . Google Scholar
S. Moroni, S. Fantoni and A. Fabrocini, Phys. Rev. B 58, 11607 (1998), DOI: 10.1103/PhysRevB.58.11607. Crossref, Web of Science, ADS, Google Scholar
M. Badjichet al., Phys. Rev. Lett. 96, 130201 (2006). Google Scholar
G. E. Astrakharchiket al., Phys. Rev. Lett. 93, 200404 (2004), DOI: 10.1103/PhysRevLett.93.200404. Crossref, Web of Science, Google Scholar
R. A. Aziz, F. R. W. McCourt and C. C. K. Wong, Mol. Phys. 61, 1487 (1987), DOI: 10.1080/00268978700101941. Crossref, Web of Science, ADS, Google Scholar
J. Boronat , Microscopic Approaches to Quantum Liquids in Confined Geometries , eds. E. Krotscheck and J. Navarro ( World Scientific , Singapore , 2002 ) . Google Scholar
E. Krotscheck , Microscopic Approaches to Quantum Liquids in Confined Geometries , eds. E. Krotscheck and J. Navarro ( World Scientific , Singapore , 2002 ) . Link, Google Scholar