DGoncz@replikon.net
Jan24-09, 06:00 AM
Could a more detailed understanding of the replusive Casimir force
measured recently showing good agreement with theory enlighten the
theory that single bubble sonoluminescence (SBSL) derives from a
dynamic Casimir force?
The conditions for the replusive force are
e1 < e2 < e3
where e is the dielectric constant and 1, 2, and 3 are a plate, a
liquid, and an opposing plate very close to plate 1.
The surest argument I see to assert there is no relation between the
replusive Casimir force and SBSL is simply "There is no plate 1 in a
bubble", but I don't see all that well. :)
I recall from an aging Optics text I still have that when total
internal reflection (TIR) is present in a configuration of matter,
there are "evanescent waves" on the far side of the rare medium, where
we would expect none using particle theory of light. I worked out in
1997 the effective cavity gain (Q) of a dense bubble in a rare medium,
and believed at the time the vapor/gas mix inside an SBSL bubble could
"cross over" from a refractive index less than the surrounding water,
to one which is greater.
The conditions for dynamic Casimir forces are relativistic, I think,
and in any case I don't understand much when I read papers about such
forces.
Perhaps one of you would start by outlining the similarities and
differences between attractive, replusive, and dynamic Casimir-
Lipschitz forces.
Referencing:
http://www.nature.com/nature/journal/v457/n7226/abs/nature07610.html
Letter
Nature 457, 170-173 (8 January 2009) | doi:10.1038/nature07610;
Received 6 August 2008; Accepted 30 October 2008
Measured long-range repulsive Casimir=96Lifshitz forces
J. N. Munday, Federico Capasso & V. Adrian Parsegian
In which we read, in the Abstract:
".... Here we show experimentally that, in accord with theoretical
prediction12, the sign of the force can be changed from attractive to
repulsive by suitable choice of interacting materials immersed in a
fluid. ...."
Doug Goncz
Replikon Research
Seven Corners, VA 22044-0394
measured recently showing good agreement with theory enlighten the
theory that single bubble sonoluminescence (SBSL) derives from a
dynamic Casimir force?
The conditions for the replusive force are
e1 < e2 < e3
where e is the dielectric constant and 1, 2, and 3 are a plate, a
liquid, and an opposing plate very close to plate 1.
The surest argument I see to assert there is no relation between the
replusive Casimir force and SBSL is simply "There is no plate 1 in a
bubble", but I don't see all that well. :)
I recall from an aging Optics text I still have that when total
internal reflection (TIR) is present in a configuration of matter,
there are "evanescent waves" on the far side of the rare medium, where
we would expect none using particle theory of light. I worked out in
1997 the effective cavity gain (Q) of a dense bubble in a rare medium,
and believed at the time the vapor/gas mix inside an SBSL bubble could
"cross over" from a refractive index less than the surrounding water,
to one which is greater.
The conditions for dynamic Casimir forces are relativistic, I think,
and in any case I don't understand much when I read papers about such
forces.
Perhaps one of you would start by outlining the similarities and
differences between attractive, replusive, and dynamic Casimir-
Lipschitz forces.
Referencing:
http://www.nature.com/nature/journal/v457/n7226/abs/nature07610.html
Letter
Nature 457, 170-173 (8 January 2009) | doi:10.1038/nature07610;
Received 6 August 2008; Accepted 30 October 2008
Measured long-range repulsive Casimir=96Lifshitz forces
J. N. Munday, Federico Capasso & V. Adrian Parsegian
In which we read, in the Abstract:
".... Here we show experimentally that, in accord with theoretical
prediction12, the sign of the force can be changed from attractive to
repulsive by suitable choice of interacting materials immersed in a
fluid. ...."
Doug Goncz
Replikon Research
Seven Corners, VA 22044-0394