Physics – Quantum Physics
Scientific paper
1995-06-15
Phys.Rev.A53:2772-2787,1996
Physics
Quantum Physics
Latex file, 28 pages, postscript file with 3 figs. attached
Scientific paper
10.1103/PhysRevA.53.2772
Sonoluminescence is explained in terms of quantum radiation by moving interfaces between media of different polarizability. In a stationary dielectric the zero-point fluctuations of the electromagnetic field excite virtual two-photon states which become real under perturbation due to motion of the dielectric. The sonoluminescent bubble is modelled as an optically empty cavity in a homogeneous dielectric. The problem of the photon emission by a cavity of time-dependent radius is handled in a Hamiltonian formalism which is dealt with perturbatively up to first order in the velocity of the bubble surface over the speed of light. A parameter-dependence of the zero-order Hamiltonian in addition to the first-order perturbation calls for a new perturbative method combining standard perturbation theory with an adiabatic approximation. In this way the transition amplitude from the vacuum into a two-photon state is obtained, and expressions for the single-photon spectrum and the total energy radiated during one flash are given both in full and in the short-wavelengths approximation when the bubble is larger than the wavelengths of the emitted light. It is shown analytically that the spectral density has the same frequency-dependence as black-body radiation; this is purely an effect of correlated quantum fluctuations at zero temperature. The present theory clarifies a number of hitherto unsolved problems and suggests explanations for several more. Possible experiments that discriminate this from other theories of sonoluminescence are proposed.
No associations
LandOfFree
Theory of quantum radiation observed as sonoluminescence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Theory of quantum radiation observed as sonoluminescence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theory of quantum radiation observed as sonoluminescence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-591005