Some applications of many-time Green's functions to the many-boson problem

✍ Scribed by A.J Kromminga

• Publisher: Elsevier Science
• Year: 1964
• Tongue: English
• Weight: 639 KB
• Volume: 26
• Category: Article
• ISSN: 0003-4916
• DOI: 10.1016/0003-4916(64)90253-2

✦ Synopsis

The spectral representation of many-time Green's functions is generalized to Green's functions in which several operators may appear in normal order. The Heisenberg picture matrix elements are given for the Green's function having one external interaction line and one external quasi-particle line and for the Green's function having two external interaction lines. It is shown how these Green's functions can be used to calculate the chemical potential and the eorrelation function.