Freezing distributed entanglement in spin chains

Details Freezing distributed entanglement in spin chains Freezing distributed entanglement in spin chains

2007-08-21

arxiv.org/abs/0708.2794v1

Phys. Rev. A 76 030302(R) (2007)

Physics

Quantum Physics

5 pages, to appear in Phys. Rev. A (Rapid Communication)

Scientific paper

10.1103/PhysRevA.76.030302

We show how to freeze distributed entanglement that has been created from the natural dynamics of spin chain systems. The technique that we propose simply requires single-qubit operations and isolates the entanglement in specific qubits at the ends of branches. Such frozen entanglement provides a useful resource, for example for teleportation or distributed quantum processing. The scheme can be applied to a wide range of systems -- including actual spin systems and alternative qubit embodiments in strings of quantum dots, molecules or atoms.

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