QDev Seminar: Alexander Balatsky

Interacting majoronics: Odd frequency pairing in majorana systems.

I will review possible collective instabilities of majorana excitations in the field we call "majoronics." As Majorana particles and antiparticles are identical the particle hole and particle particle correlators of majorana fermions are identical. Hence density waves and pairing states in majorana world are identical. One of the ubiquitous pairing states we seem to find here is the so called odd frequency (odd f) pairing state. I will introduce the odd f order and illustrate how it can be realized in majorana hosting devices. This observation points to potential of majoronics as a viable platform for a novel collective quantum states.