A direct proof of Wigner's theorem on maps which preserve transition probabilities between pure states of quantum systems

✍ Scribed by C.S Sharma; D.F Almeida

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 539 KB
• Volume: 197
• Category: Article
• ISSN: 0003-4916
• DOI: 10.1016/0003-4916(90)90213-8

✦ Synopsis

A direct proof of Wignefs theorem on transition probability preserving maps between pure states of a quantum system and a more precise statement of the theorem are provided. The mathematical proof presented here shows that the result should be as obvious to every one as it has been to Wigner.