Quantum cobwebs: Universal entangling of quantum states

Details Quantum cobwebs: Universal entangling of quantum states Quantum cobwebs: Universal entangling of quantum states

2001-01-12

arxiv.org/abs/quant-ph/0101049v4

Physics

Quantum Physics

Invited talk in II Winter Institute on FQTQO: Quantum Information Processing, held at S. N. Bose Center for Basic Science, Kol

Scientific paper

10.1007/s12043-002-0111-7

Entangling an unknown qubit with one type of reference state is generally impossible. However, entangling an unknown qubit with two types of reference states is possible. To achieve this, we introduce a new class of states called zero sum amplitude (ZSA) multipartite, pure entangled states for qubits and study their salient features. Using shared-ZSA state, local operation and classical communication we give a protocol for creating multipartite entangled states of an unknown quantum state with two types of reference states at remote places. This provides a way of encoding an unknown pure qubit state into a multiqubit entangled state. We quantify the amount of classical and quantum resources required to create universal entangled states. This is possibly a strongest form of quantum bit hiding with multiparties.

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