Entanglement for all quantum states

Details Entanglement for all quantum states Entanglement for all quantum states

2010-02-15

arxiv.org/abs/1002.2893v1

Eur.J.Phys.31:325-332,2010

Physics

Quantum Physics

9 pages

Scientific paper

10.1088/0143-0807/31/2/010

It is shown that a state that is factorizable in the Hilbert space corresponding to some choice of degrees of freedom, becomes entangled for a different choice of degrees of freedom. Therefore, entanglement is not a special case but is ubiquitous in quantum systems. Simple examples are calculated and a general proof is provided. The physical relevance of the change of tensor product structure is mentioned.

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