Abstract
It is argued that the partition of a quantum system into subsystems is dictated by the set of operationally accessible interactions and measurements. The emergence of a multipartite tensor product structure of the state space and the associated notion of quantum entanglement are then relative and observable induced. We develop a general algebraic framework aimed to formalize this concept.
- Received 7 August 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.060402
©2004 American Physical Society