A description of collective degree of freedom as a dynamical variable: II. Classical field theory and the Bohm-Pines theory

✍ Scribed by Yasushi Takahashi

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 327 KB
• Volume: 167
• Category: Article
• ISSN: 0378-4371
• DOI: 10.1016/0378-4371(90)90124-b

✦ Synopsis

As a sequel to the elementary consideration of the properties of the redundant ignorable variable, we extend the argument to the Schr6dinger field. The Bohm-Pines theory of the collective mode will be worked out systematically from this point of view. It will be observed that the variable representing the collective mode is introduced in connection with the symmetry of the system, unlike the way in which Bohm and Pines assumed the variable in a rather ad hoc manner.