Minimum signals in classical physics

• 来源期刊: 中国物理（英文版）
• 关键词: time-dependent signals Fourier bandwidth theorem minimum uncertainty states
• 年，卷（期）: 2003,（10）
• 页码范围: 1062-1065
• 页数: 4页
• 语种: 英文

摘要

The bandwidth theorem for Fourier analysis on any time-dependent classical signal is shown using the operator approach to quantum mechanics. Following discussions about squeezed states in quantum optics, the problem of minimum signals presented by a single quantity and its squeezing is proposed. It is generally proved that all such minimum signals, squeezed or not, must be real Gaussian functions of time.