A theoretical physicist who, with Martin Bodo Plenio, introduced entanglement catalysis in transformations of pure quantum states. An auxiliary entangled state can enable a conversion by local operations and classical communication that would otherwise be impossible, yet be returned unchanged. The example shows why the possibilities of manipulating quantum entanglement cannot be described by a single notion of how much entanglement a state contains.[ref]
Entanglement-assisted local manipulation of pure quantum states by Daniel Jonathan and Martin B. Plenio. Abstract: catalytic transformations and finite-state entanglement concentration
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