Entanglement of a Single Spin-1 Object: An Example of Ubiquitous Entanglement

Details Entanglement of a Single Spin-1 Object: An Example of Ubiquitous Entanglement Entanglement of a Single Spin-1 Object: An Example of Ubiquitous Entanglement

2006-04-25

arxiv.org/abs/quant-ph/0604182v2

Physics

Quantum Physics

12 pages, 2 figure : title has been changed, paper is re-organized, new section "Violation of Bell-type condition by single sp

Scientific paper

10.1007/s10701-007-9149-1

Using a single spin-1 object as an example, we discuss a recent approach to quantum entanglement. The key idea of the approach consists in presetting of basic observables in the very definition of quantum system. Specification of basic observables defines the dynamic symmetry of the system. Entangled states of the system are then interpreted as states with maximal amount of uncertainty of all basic observables. The approach gives purely physical picture of entanglement. In particular, it separates principle physical properties of entanglement from inessential. Within the model example under consideration, we show relativity of entanglement with respect to dynamic symmetry and argue existence of single-particle entanglement. A number of physical examples are considered.

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