Entanglement of a single spin-1 object: An example of ubiquitous entanglement
Author
Binicioǧlu, S.
Can, M. A.
Klyachko, A. A.
Shumovsky, A. S.
Date
2007Source Title
Foundations of Physics
Print ISSN
0015-9018
Electronic ISSN
1572-9516
Publisher
Springer New York LLC
Volume
37
Issue
8
Pages
1253 - 1277
Language
English
Type
ArticleItem Usage Stats
133
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Abstract
Using a single spin-1 object as an example, we discuss a recent approach to quantum entanglement. [A.A. Klyachko and A.S. Shumovsky, J. Phys: Conf. Series 36, 87 (2006), E-print quant-ph/0512213]. 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.