Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 22: Photon Sources for Quantum Networks SYQR 4 (with Q)
A 22.6: Vortrag
Dienstag, 18. März 2014, 15:15–15:30, Kinosaal
Quantum teleportation and entanglement swapping of matter qubits with multiphoton signals — •Juan Mauricio Torres1,2, József Zsolt Bernád1, and Gernot Alber1 — 1Institut für Angewandte Physik, Technische Universität Darmstadt, D-64289 Germany — 2Departamento de Investigación en Física, Universidad de Sonora, Hermosillo, México
We introduce a probabilistic Bell measurement of atomic qubits based on two consecutive photonic field measurements of two single mode cavities with which the atoms interact in two separate stages. To this end, we solve the two-atoms Tavis-Cummings model and exploit the property that the antisymmetric Bell state is insensitive to the interaction with the field. We consider implementations for quantum teleportation and for entanglement swapping protocols both of which can be achieved with 25% success probability and with unit fidelity. We emphasize possible applications for hybrid quantum repeaters where the aforementioned quantum protocols play an essential role.