Extraction of an Entanglement by Repetition of the Resonant Transmission of an Ancilla Qubit

Details Extraction of an Entanglement by Repetition of the Resonant Transmission of an Ancilla Qubit Extraction of an Entanglement by Repetition of the Resonant Transmission of an Ancilla Qubit

2009-08-30

arxiv.org/abs/0908.4377v2

J. Phys. A 43, 095304 (2010)

Physics

Quantum Physics

14 pages, 7 figures

Scientific paper

10.1088/1751-8113/43/9/095304

A scheme for the extraction of entanglement in two noninteracting qubits (spins) is proposed. The idea is to make use of resonant transmission of ancilla qubit through the two fixed qubits, controlled by the entanglement in the scatterers. Repetition of the resonant transmission extracts the singlet state in the target qubits from their arbitrary given state. Neither the preparation nor the post-selection of the ancilla spin is required, in contrast to the previously proposed schemes.

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