Subsystem purity as an enforcer of entanglement.
We show that entanglement can always arise in the interaction of an arbitrarily large system in any mixed state with a single qubit in a pure state. This small initial purity is enough to enforce entanglement even when the total entropy is close to maximum. We demonstrate this feature using the Jayn...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2001
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