Title: Density Collective Modes of Exciton Superfluidity in Bilayer Systems.
Authors: Pascucci, Filippo; Conti, Sara; Neilson, David; Perali, Andrea; Tempere, Jacques
Abstract: We propose a new way to establish the existence of a superfluid phase in an exciton bilayer system by exploiting the properties of its collective modes. We focus on the density collective modes and treat them within Random Phase Approximation. By comparing results for the normal and superfluid states, we are able to identify unambiguous fingerprints of the exciton superfluid phase. We compare the collective modes of the exciton system and cold atom systems, and we discuss the collective modes of the exciton superfluid order parameter.
Subjects: SUPERFLUIDITY; EXCITON theory; DENSITY; ATOMS
Publication: Condensed Matter, 2025, Vol 10, Issue 1, p7
ISSN: 2410-3896
Publication type: Academic Journal
DOI: 10.3390/condmat10010007

Density Collective Modes of Exciton Superfluidity in Bilayer Systems.

Pascucci, Filippo; Conti, Sara; Neilson, David; Perali, Andrea; Tempere, Jacques