The Quantum No-Stretching: A geometrical interpretation of the no-cloning theorem

Details The Quantum No-Stretching: A geometrical interpretation of the no-cloning theorem The Quantum No-Stretching: A geometrical interpretation of the no-cloning theorem

2008-12-10

arxiv.org/abs/0812.1985v2

Phys. Lett. A 373, pp2416-2419 (2009)

Physics

Quantum Physics

Scientific paper

10.1016/j.physleta.2009.02.015

We consider the ideal situation in which a space rotation is transferred from a quantum spin j to a quantum spin l different from j. Quantum-information theoretical considerations lead to the conclusion that such operation is possible only for lj. For l>j the optimal stretching transformation is derived. We show that for qubits the present no-stretching theorem is equivalent to the usual no-cloning theorem.

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