Physics – Quantum Physics
Scientific paper
1995-10-27
Am.J.Phys.64:944-953,1996
Physics
Quantum Physics
accepted for publication in Am. J. Phys
Scientific paper
10.1119/1.18304
Localized quantum wave packets can be produced in a variety of physical systems and are the subject of much current research in atomic, molecular, chemical, and condensed-matter physics. They are particularly well suited for studying the classical limit of a quantum-mechanical system. The motion of a localized quantum wave packet initially follows the corresponding classical motion. However, in most cases the quantum wave packet spreads and undergoes a series of collapses and revivals. We present a generic treatment of wave-packet evolution, and we provide conditions under which various types of revivals occur in ideal form. The discussion is at a level appropriate for an advanced undergraduate or first-year graduate course in quantum mechanics. Explicit examples of different types of revival structure are provided, and physical applications are discussed.
Bluhm Robert
Kostelecky Alan
Porter James
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