Collective excitations and screening properties of a condensed charged Bose gas

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.51.5887· OSTI ID:6544216

Alexandrov, A S; Beere, W H ^[1]

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1. Interdisciplinary Research Center in Superconductivity, University of Cambridge, Madingley Road, Cambridge, CB3 0HE (United Kingdom)

The Bogoliubov--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 [ital 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.

• OSTI ID: 6544216
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:9; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665200 -- Solid-State Plasma-- (1992-)
665400* -- Quantum Physics Aspects of Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOGOLYUBOV METHOD
BOSE-EINSTEIN GAS
CALCULATION METHODS
COLLECTIVE EXCITATIONS
DIELECTRIC PROPERTIES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY-LEVEL TRANSITIONS
EXCITATION
GAUGE INVARIANCE
INVARIANCE PRINCIPLES
PHYSICAL PROPERTIES
PLASMONS
QUASI PARTICLES
SUPERCONDUCTIVITY