Quantum information cannot be split into complementary parts

Details Quantum information cannot be split into complementary parts Quantum information cannot be split into complementary parts

2005-03-20

arxiv.org/abs/quant-ph/0503168v2

Phys. Lett. A 352, 41 (2006)

Physics

Quantum Physics

9 pages, 1 figure

Scientific paper

10.1016/j.physleta.2005.11.041

We prove a new impossibility for quantum information (the no-splitting
theorem): an unknown quantum bit (qubit) cannot be split into two complementary
qubits. This impossibility, together with the no-cloning theorem, demonstrates
that an unknown qubit state is a single entity, which cannot be cloned or
split. This sheds new light on quantum computation and quantum information.

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