By Diego A. R. Dalvit, Peter W. Milonni, David C. Roberts (auth.), Diego Dalvit, Peter Milonni, David Roberts, Felipe da Rosa (eds.)
Casimir results function basic examples of at once observable manifestations of the nontrivial homes of quantum fields, and as such are attracting expanding curiosity from quantum box theorists, particle physicists, and cosmologists. additionally, although very susceptible other than at brief distances, Casimir forces are common within the feel that every one fabric items are topic to them. they're therefore additionally an more and more vital a part of the physics of atom-surface interactions, whereas in nanotechnology they're being investigated not just as participants to ‘stiction’ but additionally as power mechanisms for actuating micro-electromechanical devices.
While the sphere of Casimir physics is increasing speedily, it has reached a degree of adulthood in a few vital respects: at the experimental part, the place so much resources of imprecision in strength measurements were pointed out in addition to at the theoretical part, the place, for instance, semi-analytical and numerical equipment for the computation of Casimir forces among our bodies of arbitrary form were effectively built. This ebook is, then, a well timed and entire advisor to the essence of Casimir (and Casimir-Polder) physics that might have lasting worth, serving the twin objective of an creation and connection with the sphere. whereas this quantity isn't meant to be a unified textbook, yet quite a suite of mostly autonomous chapters written through widespread specialists within the box, the designated and punctiliously written articles undertake a mode that are meant to entice non-specialist researchers within the box in addition to to a broader viewers of graduate students.
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Gravity couples to the local energy-momentum or stress tensor, and, in the leading quantum approximation, it is the vacuum expectation value of the stress tensor that provides the source term in Einstein’s equations. Self energies should therefore in principle be observable. This is largely uncharted territory, except in the instance of the classic situation of parallel plates. There, after a bit of initial confusion, it has now been established that the divergent self-energies of each plate in a two-plate apparatus, as well as the mutual Casimir energy due to both plates, gravitates according to the equivalence principle, so that indeed it is consistent to absorb the divergent selfenergies of each plate into the gravitational and inertial mass of each [22, 23].
Decca et al also discuss electrostatic calibration and other matters involved in Casimir force experiments, and describe potential opto-mechanical experiments that might allow further improvements in the precision of Casimir force measurements. Van Zwol, Svetovoy, and Palasantzas address the requirement, for any comparison of theory and experiment, of having accurate values of optical permittivities; they emphasize that the permittivities of conducting films, which are needed for all frequencies in the Lifshitz theory, are not always reliably given by tabulated data, since they can vary significantly from sample to sample, depending on how the samples are prepared.
Such potentials were first considered by the Leipzig group [39, 40], but more recently have been the focus of the program of the MIT group [41–44]. The discussion here is based on a paper by the author .