New second branch of the spectrum of the BCS Hamiltonian and a “pseudogap”

• Дата: 2005
• Автори: Petrina, D. Ya., Петрина, Д. Я.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Institute of Mathematics, NAS of Ukraine 2005
• Онлайн доступ: https://umj.imath.kiev.ua/index.php/umj/article/view/3704
• Назва журналу: Ukrains’kyi Matematychnyi Zhurnal

The BCS Hamiltonian of superconductivity has the second branch of eigenvalues and eigenvectors. It consists of wave functions of pairs of electrons in ground and excited states. The continuous spectrum of excited pairs is separated by a nonzero gap from the point of the discrete spectrum that corres...