Robust entanglement

Details Robust entanglement Robust entanglement

2005-08-02

arxiv.org/abs/quant-ph/0508021v1

Appl. Phys. B 81, 151 (2005)

Physics

Quantum Physics

Scientific paper

10.1007/s00340-005-1917-z

It is common belief among physicists that entangled states of quantum systems
loose their coherence rather quickly. The reason is that any interaction with
the environment which distinguishes between the entangled sub-systems collapses
the quantum state. Here we investigate entangled states of two trapped Ca$^+$
ions and observe robust entanglement lasting for more than 20 seconds.

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