https://doi.org/10.1140/epjd/s10053-021-00084-w
Regular Article - Atomic Physics
Quantum phase transition in symmetric quantum three-body system
1
Department of Physics, Adamas University, 700126, Barasat, Kolkata, India
2
Department of Physics, Aliah University, 700160, Newtown, Kolkata, India
3
Department of Mathematics, Netaji Nagar Day College, 700 092, Kolkata, India
Received:
18
January
2021
Accepted:
13
February
2021
Published online:
2
March
2021
Bound state energy (E) and the position (
) and width (
) of the first S symmetry doubly excited Feshbach resonance state of various symmetrical three-body systems (XYY) bound via screened Coulomb (SC) interaction have been reported using soft-wall strategy of stabilization method. Explicitly correlated multi-exponent Hylleraas-type basis set has been considered under the Ritz variational framework. Critical nuclear charges of the systems in its ground state (
) as well as in Feshbach resonance state (
) for various screening parameters (
) have been evaluated. First-order quantum phase transition (QPT) for all the systems has been reported in its ground state. Effect of different mass combination of the constituents particles on critical points of the systems has been explored extensively.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021
