TY  - JOUR
AU  - Guardiola, R.
AU  - Navarro, J.
PY  - 2011
DA  - 2011//
TI  - On the Lindemann Criterion for Quantum Clusters at Very Low Temperature
T2  - J. Phys. Chem. A
JO  - Journal of Physical Chemistry A
SP  - 6843
EP  - 6850
VL  - 115
IS  - 25
PB  - Amer Chemical Soc
AB  - The Lindemann criterion to discern the solid-like or liquid-like nature of a quantum cluster at T = 0 is discussed. A critical analysis of current Lindemann parameters is presented and a new parameter is proposed that is appropriate to study quantum clusters made of identical particles. A simple model wave function is introduced to fix the range of variation of these parameters. The model presents two extreme limits that correspond to either a liquid-like or a solid-like system; besides, it fulfills the Bose symmetry and also permits evaluations without symmetrization. Variational and diffusion Monte Carlo calculations are also performed for clusters of spinless bosons interacting through Lennard-Jones potentials. It is shown that the liquid-like or solid-like character of quantum clusters at zero temperature cannot be simply established in terms of a single parameter.
SN  - 1089-5639
UR  - https://doi.org/10.1021/jp1111313
DO  - 10.1021/jp1111313
LA  - English
N1  - ISI:000291895500012
ID  - Guardiola+Navarro2011
ER  -