Macroscopic Quantum Tunneling

Macroscopic quantum phenomena are particularly important when considering the problem of Schrödinger's cat. This book contains a coherent and self-contained account of such phenomena, focusing on the central role played by macroscopic quantum tunneling. Beginning with an explanation of the nature and significance of the cat problem, Shin Takagi introduces the concept of macroscopic quantum tunneling. He deals with typical examples in detail, elucidating how quantum mechanical coherence may be lost (so-called 'decoherence') or how it may be maintained despite the effects of environment and measurement processes. Recent experimental and theoretical advances are discussed, and the remaining problems described. The final chapter describes an experiment to decide between quantum mechanics and macrorealism in the light of Einstein's moon. Assuming only a knowledge of elementary quantum mechanics, this book emphasises conceptual aspects rather than technical details. It provides a firm introduction to the subject for graduate students and researchers.

Shin Takagi is Professor of Physical Sciences at Fuji Tokoha University, and is probably best known for the so-called Leggett-Takagi equation which explains the spin dynamics of superfluid helium 3. He has worked in several fields of theoretical physics including low temperature physics, quantum field theory in curved space and the problem of time and history in quantum mechanics