CJT effective action

The work "High temperature symmetry nonrestoration and inverse symmetry breaking in the CornwallJackiw-Tomboulis formalism" uses the finite temperature CJT effective action to shed new light on the Z2 x Z2 model in connection with the domain wall and other problems. Section II is dedicated to the calculation and normalization of the CJT effective action and Sec. III to the study of high temperature SNR and ISB. The results are discussed in Sec. IV where some conclusions are spelled out.

6p runordie5 04-07-2022 5 3   Download

Basing on the Cornwall-Jackiw-Tomboulis (CJT) effective action approach, a theoretical formalism is established to study the Phase Transition in a binary mixture. The effective potential, which preserves the Goldstone theorem, is found in the Hartree-Fock (HF) approximation. This quantity is then used to consider the equation of state and the phase transition of the system.

11p larachdumlanat127 20-12-2020 11 2   Download

By means of Cornwall-Jackiw-Tomboulis (CJT) effective action approach, the condensate density of a dilute Bose gas is investigated in the canonical ensemble. Our results show that the condensate density is proportional to a half-integer power law of the s-wave scattering length and distance between two plates. Apart from that, these quantities also depend on the particle number and area of each plate.

9p trinhthamhodang9 10-12-2020 13 1   Download

Quantum phase transition and dynamical stability in Bose-Einstein condensates (BECs) are studied within the framework of the Cornwall-Jackiw-Tomboulis (CJT) effective action approach. The effective potential is found in the double-bubble diagram approximation. Numerical results show that in this approximation stability is strongly influenced by the chemical potential and the quantum phase transition is of second order.

8p tamynhan9 02-12-2020 19 4   Download

A renormalization prescription is developed for CJT effective action in the double bubble approximation. It is shown that the triviality-related feature of the model does not show up. The phase transitions patterns are considered in detail for a specified set of model parameters.

11p tamynhan9 02-12-2020 8 2   Download

The thermal and quantum phase transitions are studied basing on the Cornwall-Jackiw-Tomboulis (CJT) effective action approach for the relativistic linear sigma model of the two-component mixing system. After obtaining the expression of the thermodynamic potential in Hartree-Fock (HF) approximation, which preserves the Goldstone theorem, the numerical results show that there may be two phase transition scenarios in the system.

8p viedison2711 03-09-2019 11 1   Download