Naslov
Universality of atomic trimers in quantum halo states

Autori
Stipanović, Petar ; Vranješ Markić, Leandra ; Bešlić, Ivana ; Boronat, Jordi

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, ostalo

Izvornik
School in Computational Condensed Matter Physics: From Atomistic Simulations to Universal Model Hamiltonians / - , 2015

Skup
School in Computational Condensed Matter Physics: From Atomistic Simulations to Universal Model Hamiltonians

Mjesto i datum
Trst, Italija, 07.09.2015. - 25.09.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
universality ; quantum halo state ; dimer ; trimer ; teramer

Sažetak
The results of the recent research in quantum halo systems will be presented. Ground state of weakly bound trimers with a radius extending well into the classically forbidden region is explored, with the goal to test the predicted universality of quantum halo states. The focus of the study are molecules consisting of T$\downarrow$, D$\downarrow$, $^3$He, $^4$He and alkali atoms, where interaction between particles is much better known than in the case of nuclei, which are traditional examples of quantum halos. The study of realistic systems is supplemented by model calculations in order to analyze how low-energy properties depend on the interaction potential. The use of variational and diffusion Monte Carlo methods enabled very precise calculation of both size and binding energy of the trimers. Using dimensionless measures of the binding energy and cluster size, studied atomic clusters are compared to other known halos in different fields of physics. In the quantum halo regime, and for large values of scaled binding energies, all clusters follow almost the same universal line. As the scaled binding energy decreases, Borromean states separate from tango trimers. Furthermore, the structure of different trimers are compared using different distribution functions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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