TY - JOUR
T1 - Response functions and superfluid density in a weakly interacting Bose gas with nonquadratic dispersion
AU - Keeling, Jonathan Mark James
PY - 2006/10
Y1 - 2006/10
N2 - Motivated by the experimental search for Bose condensation of quasiparticles in semiconductors, the response functions of a weakly interacting Bose gas, with isotropic but nonquadratic dispersion, are considered. Nonquadratic dispersion modifies the definition of particle current, and leads to modified sum rules for the current-current response function. The effect of these modifications on the Berezhinski-Kosterlitz-Thouless transition is discussed.
AB - Motivated by the experimental search for Bose condensation of quasiparticles in semiconductors, the response functions of a weakly interacting Bose gas, with isotropic but nonquadratic dispersion, are considered. Nonquadratic dispersion modifies the definition of particle current, and leads to modified sum rules for the current-current response function. The effect of these modifications on the Berezhinski-Kosterlitz-Thouless transition is discussed.
KW - SEMICONDUCTOR MICROCAVITY
KW - EINSTEIN CONDENSATION
KW - POLARITON LASER
KW - SYSTEMS
UR - http://www.scopus.com/inward/record.url?scp=33750464084&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.74.155325
DO - 10.1103/PhysRevB.74.155325
M3 - Article
SN - 1098-0121
VL - 74
SP - 155325
JO - Physical Review. B, Condensed matter and materials physics
JF - Physical Review. B, Condensed matter and materials physics
IS - 15
ER -