ЛАБОРАТОРИЯ ТЕОРЕТИЧЕСКОЙ ФИЗИКИ им. Н. Н. БОГОЛЮБОВА

СЕМИНАР ПО ЯДЕРНОЙ ФИЗИКЕ НИЗКИХ ЭНЕРГИЙ

(сектора № 1 и № 2 научного отдела теории атомного ядра)

16 мая 2017 года в 11⁰⁰

ауд. им. Д. И. Блохинцева

Dragos-Victor Anghel

Department of Theoretical Physics, IFIN-HH, Romania

Phenomenology beyond the BCS theory

Making a slight generalization of the BCS model, by allowing the chemical potential to take different values inside the attraction band, I show that the phenomenology can be dramatically enriched. This may lead to a discontinuous phase transition (the energy gap has a jump at the phase transition), two solutions for the energy gap equations, etc. I show both zero temperature [1] and finite temperature results [2].

[1] D. V. Anghel, arXiv:1609.07931.

[2] D. V. Anghel and G. A. Nemnes, Physica A 464, 74 (2016).