https://doi.org/10.1140/epjb/e2003-00061-3
Density expansion of the energy of N close-to-boson excitons
GPS, Université Denis Diderot and Université Pierre et Marie Curie, CNRS, Tour 23, 2
place Jussieu, 75251 Paris Cedex 05, France
Corresponding author: a combescot@gps.jussieu.fr
Received:
11
February
2002
Revised:
30
May
2002
Published online:
6
March
2003
Pauli exclusion between the carriers of N excitons
induces novel many-body effects, quite different from
the ones generated by Coulomb interaction. Using our
commutation technique for interacting close-to-boson
particles, we here calculate the Hamiltonian
expectation value in the N-ground-state-exciton state.
Coulomb interaction enters this quantity at first order
only by construction; nevertheless, due to Pauli
exclusion, subtle many-body effects take place, which
give rise to terms in
with
. An exact procedure to get
these density dependent terms is given.
PACS: 71.35.-y – Excitons and related phenomena
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003