2134/4282
A.S. Alexandrov
W.H. Beere
Collective excitations and screening properties of a condensed charged Bose gas
2009
Loughborough University
untagged
2009-02-27 13:06:53
article
https://repository.lboro.ac.uk/articles/Collective_excitations_and_screening_properties_of_a_condensed_charged_Bose_gas/9409148
The Bogoliubovâ€“de Gennes (BdG) type equations are derived for the Coulomb Bose gas describing the electrodynamics of charged bosons. The gauge invariant dielectric response function and collective excitations of a charged Bose gas at T=0 are found. We find a plasmon branch which is the same as the single-particle Bogoliubov spectrum in agreement with the textbook result. The superconducting properties of the charged Bose gas are verified. A gauge-invariant formalism for calculating the response of the supracondensate particles is proposed.