This book is devoted to the physics of electronic fluctuations (noise) in solids and covers almost all important examples of this phenomenon. It is comprehensive, intelligible and well illustrated. Emphasis is given to the main concepts, supported by many fundamental experiments which have become classics, to physical mechanisms of fluctuations, and to conclusions on the nature and magnitude of noise. The book also includes a comprehensive and complete review of flicker (1/f) noise in the literature. It will be useful to graduate students and researchers in physics and electronic engineering, and especially those carrying out research in the fields of noise phenomena and highly sensitive electronic devices, for example radiation detectors, electronic devices for low-noise amplifiers and quantum magnetometers (SQUIDS).

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Decoherence of a shallow donor electron spin in silicon caused by electron-lattice interaction is studied. We find that there are two time scales associated with the evolution of the electron spin density matrix: the fast but incomplete decay due to the interaction with non-resonant phonons followed by slow relaxation resulting from spin flips accompanied by resonant phonon emission. We estimate both time scales as well as the magnitude of the initial drop of coherence for P donor in Si and argue that the approach used is suitable for evaluation of phonon induced decoherence for a general class of localized spin states in semiconductors.

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Studying the behaviour of null geodesics in Bonnor's rotating dust cloud solution reveals a peculiar central region. This region cannot be penetrated by null geodesics from spatial infinity. Conversely, null geodesics from within the region cannot extend to spatial infinity. There is no event horizon.

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