5 citations · 5 across the 1 of their papers we have counts for
5 papers
Coexistence of phase transitions and hysteresis near BEC
M. Männel, K. Morawetz, P. Lipavský
Multiple phases occurring in a Bose gas with finite-range interaction are investigated. In the vicinity of the onset of Bose-Einstein condensation (BEC) the chemical potential and…
Stability of condensate in superconductors
Pavel Lipavský, Břetislav Šopík, Michael Männel +1
According to the BCS theory the superconducting condensate develops in a single quantum mode and no Cooper pairs out of the condensate are assumed. Here we discuss a mechanism by w…
Conserving T-matrix theory of superconductivity
Břetislav Šopík, Pavel Lipavský, Michael Männel +2
We remove a self-interaction from the Galitskii-Feynman T-matrix approximation. This correction has no effect in the normal state but makes the theory applicable to the superconduc…
Multiple condensed phases in attractively interacting Bose systems
M. Männel, K. Morawetz, P. Lipavský
We investigate a Bose gas with finite-range interaction using a scheme to eliminate unphysical processes in the T-matrix approximation. In this way the corrected T-matrix becomes s…
Impossibility to describe repulsion with contact interaction
K. Morawetz, M. Maennel
Contact interactions always lead to attractive behaviour. Arguments are presented to show why a repulsive interacting system, e.g. Bose gases, cannot be described by contact intera…