QFS2016 Book of Abstracts

Abstracts

P1.14 Cosmological and particle physics experiments in superfluids Bunkov Yury Institut NEEL, CNRS, 25, Av. des Martyrs, Grenoble, France and Kazan Federal University, 18, Kremlevskaya, Kazan, Russia Owing the combined symmetries the symmetry-breaking phase transitions in the Universe and superfluid 3 He has a many similarities. The 3 He may play of the role of test tube for different theories of the Universe and particle physics. In this presentation we will discuss the multiverse scenario of the Universe development. In particularly, the A-B phase transition may be considered in a frame of multiverse and inflation theories. There will be discussed different types of elementary excitations, including Majorana, Higgs boson, magnon BEC ets. P1.15 Ground state properties of quantum halo trimers and tetramers Vranjes Markic Leandra(1), Stipanovic Petar(1), Jordi Boronat(2) (1) University of Split, Faculty of Science, Rudera Boskovica 33, 21000 Split, Croatia (2) Departament de Fisica i Enginyeria Nuclear, Campus Nord B4-B5, Universitat Politecnica de Catalunya, E-08034 Barcelona, Spain Recent research of weakly bound systems consisting of few particles will be presented, with special emphasis on the universality of quantum halo states - weakly bound systems with a radius extending well into the classically forbidden region. The focus of the study are clusters consisting of T ↓ , D ↓ , 3 He, 4 He and alkali atoms. The use of variational and diffusion Monte Carlo methods enabled very precise calculation of both size and binding energy of the trimers and tetramers. Using dimensionless measures of the binding energy and cluster size, studied clusters are compared to other known halos in different fields of physics. Furthermore, the structural properties of helium trimers are compared with recently published experimental results.

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