Unitarity as preservation of entropy and entanglement in quantum systems

Florian Hulpke, Uffe V. Poulsen, Anna Sanpera, Aditi Sen, Ujjwal Sen, MacIej Lewenstein

Research output: Contribution to journalReview articleResearchpeer-review

14 Citations (Scopus)


The logical structure of Quantum Mechanics (QM) and its relation to other fundamental principles of Nature has been for decades a subject of intensive research. In particular, the question whether the dynamical axiom of QM can be derived from other principles has been often considered. In this contribution, we show that unitary evolutions arise as a consequences of demanding preservation of entropy in the evolution of a single pure quantum system, and preservation of entanglement in the evolution of composite quantum systems. 6. © 2006 Springer Science+Business Media, Inc.
Original languageEnglish
Pages (from-to)477-499
JournalFoundations of Physics
Issue number4 SPEC. ISS.
Publication statusPublished - 1 Apr 2006


  • Dynamical axiom of Quantum mechanics
  • Entanglement preservation
  • Entropy preservation


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