Robust entanglement
classification
🪐 quant-ph
keywords
entangledentanglementquantumrobuststatesbeliefcoherencecollapses
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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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