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Cavitation and Light Emission
Published in Dmitry A. Biryukov, Denis N. Gerasimov, Eugeny I. Yutin, Cavitation and Associated Phenomena, 2021
Dmitry A. Biryukov, Denis N. Gerasimov, Eugeny I. Yutin
The most exotic, but still scientific, theory of sonoluminescence implies that SL is the quantum vacuum radiation ((Eberlein 1996 a,b) based on an idea from (Scwinger1992))—the so-called dynamic Casimir effect. This effect is quantum fluctuations of the electromagnetic field, which may cause the attraction of two metal plates placed very close to each other—the most popular manifestation of the Casimir effect. The application of this theory to SL has been strongly criticized (Unnikrasann and Mukhopadhyay 1996) and now it is not even discussed, but, indeed, this hypothesis was very original.
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Published in Carl W. Hall, Laws and Models, 2018
Keywords: age, area, healing, time, wound CARREL, Alexis, 1873-1944, French American surgeon; Nobel prize, 1912, physiology/medicine Source: Schlesinger, B. S. and J. H. 1991. CASIMIR EFFECT (1948) The motion of two parallel plates so close together that only small fluctuations count as a result of quantum fluctuations in a vacuum, and work to push the plates together. The effect was measured by S. K. Lamoreaux. Keywords: fluctuation, parallel plates, quantum CASIMIR, Hendrik B. C., twentieth century (b. 1909), Dutch physicist LAMOREAUX, Steve K., twentieth century, American physicist (at Los Alamos National Lab.) Source: Scientific American 277(6):84, December 1997. CASSINI LAWS (1721) Three laws that describe the rotation of the Moon about its center of mass: Law 1 The Moon rotates about an axis fixed within it, with constant angular velocity in a period of rotation equal to the mean sidereal period of revolution of the Moon about the Earth. Law 2 The inclination of the mean plane of the Moon about the Earth to the plane of the ecliptic is constant. Law 3 The poles of the lunar equator, the ecliptic and the Moon's orbital plane all lie on one great circle. Keywords: Earth, inclination, Moon, rotation CASSINI, Jacques, 1677-1756, French Italian astronomer Source: Mitton, J. 1993. See also KEPLER CASTIGLIANO LAW OR PRINCIPLE OF LEAST WORK The partial derivative of the total elastic energy stored in a structure with respect to one of the loads, gives the displacement of the point of application of the load in the direction of the load. Keywords: elasticity, energy, load CASTIGLIANO, C. Alberto, 1847-1884, Italian engineer Sources: Morris, C. G. 1992; Scott, J. S. 1993. See also LAGRANGE PRINCIPLE; MAUPERTUIS CASTLE-HARDY-WEINBERG LAW--SEE HARDY-WEINBERG LAW CATALYSIS LAW--SEE BRNSTED CATEGORICAL JUDGMENT, LAW OF A law of comparative judgment that should provide an equal-interval category scale that assumes that the psychological continuum of an individual can be divided into categories in which a category boundary is not a stable entity and the responses of the individual are
Quantization of magnetoelectric fields
Published in Journal of Modern Optics, 2019
The evanescent modes, having an imaginary wave number, represent the mathematical analogy of the tunnelling solutions of the Schrödinger equation. However, the quantization of evanescent waves is not a straightforward problem. Many fundamental optical properties rely on virtual photons to act as the mediator. A well-known example of the Casimir effect can be understood as involving the creation of short lived virtual photons from the vacuum. Together with the calculation of the Casimir force between arbitrary materials, in numerous publications, the question of the angular-momentum coupling with the quantum vacuum fields is considered as a topical subject. Since photons also carry the angular momentum, the vacuum torque will appear between macroscopic bodies when their characteristic properties are anisotropic (14–20). In particular, in Refs (14,15,17,20), it was discussed that vacuum can induce a torque between two axial birefringent dielectric plates. In this case, the fluctuating electromagnetic fields have boundary conditions that depend on the relative orientation of optical axes of the materials. Hence, the zero-point energy arising from these fields also has an angular dependence. This leads to a Casimir torque that tends to align two of the principal axes of the material in order to minimize the system’s energy. A torque occurs only if symmetry between the right-handed and left-handed circularly polarized light is broken (when the media are birefringent).
Casimir force in dense confined electrolytes
Published in Molecular Physics, 2018
Alpha A. Lee, Jean-Pierre Hansen, Olivier Bernard, Benjamin Rotenberg
In this paper, we explore an additional mechanism of force generation in confined systems, namely the classical counterpart of the celebrated quantum Casimir effect of an electromagnetic field fluctuation-induced force acting between the confining surfaces [19]. The classical Casimir effect is observed in high temperature confined systems, where the thermal fluctuations now play the role of quantum field fluctuations. Restrictions on the possible Fourier components (or modes) of thermal fluctuations imposed by spatial confinement generate the classical Casimir force. Large amplitude critical fluctuations in a fluid close to a thermodynamic critical point strongly enhance the classical Casimir effect, where the universality of critical scaling laws entails a corresponding universality of the Casimir force [20] (for a recent review of the classical Casimir force, see [21]).