Quantum Pairing Time Orders
arXiv:1912.12219 · doi:10.1002/andp.201900529
Abstract
We propose the concept of the time-independent correlators for the even- and odd-frequency pairing states that can be defined for both bosonic and fermionic quasiparticles. These correlators explicitly capture the existence of two distinct classes of pairing states and provide a direct probe of the hidden Berezinskii order. This concept is illustrated in the cases of pairings for Majorana fermions and quasiparticles in Dirac semimetals. It is shown that the time-independent correlator is able to effectively capture the energy scale relevant for pairing.
6 pages, 1 figure; invited contribution to a special issue of Annalen der Physik