Acoustic waves propagating in composite-particle gases under uniform gravitational fields

Details Acoustic waves propagating in composite-particle gases under uniform gravitational fields Acoustic waves propagating in composite-particle gases under uniform gravitational fields

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrvd..71j3003c&link_type=abstract

Physical Review D, vol. 71, Issue 10, id. 103003

Computer Science

Sound

Atomic Processes And Interactions, Quantum Transport, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

The quantum discrete kinetic equations are solved to study the propagation of plane waves in a system of composite particles under the magnetic field which is subjected to the Beltrami field condition and particles being also under uniform external gravitational field. We compare the dispersion relations thus obtained by the relevant Pauli-blocking factor θ which describes the different-statistics particles for the quantum analog of the discrete Boltzmann system when θ is positive (say, θ=1 for Bose gases), zero (Boltzmann gases), and negative (θ=-1 for Fermi Gases). We found, as the effect of magnetic field being zero (using the Beltrami field condition), the gravitational field effect will induce anomalous dispersion relations (e.g., negative sound speed).

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