2 00 6 Entanglement Controlled Single - Electron

F eb 2 00 6 Entanglement between static and flying qubits in a semiconducting carbon nanotube

Entanglement can be generated by two electrons in a spin-zero state on a semiconducting single-walled carbon nanotube. The two electrons, one weakly bound in a shallow well in the conduction band, and the other injected into the conduction band, are coupled by the Coulomb interaction. Both transmission and entanglement are dependent on the well characteristics, which can be controlled by a loca...

A ug 2 00 5 Electron - hole entanglement in the Fermi sea

Entanglement controlled single - electron transmittivity

We show that the electron transmittivity of single electrons propagating along a one-dimensional (1D) wire in the presence of two magnetic impurities is affected by the entanglement between the impurity spins. For suitable values of the electron wave vector, there are two maximally entangled spin states which, respectively, make the wire completely transparent whatever the electron spin state o...

05 06 2 v 1 1 4 M ay 2 00 1 Controlled entanglement of two field modes in a Cavity Quantum Electrodynamics experiment

Using a single circular Rydberg atom, we have prepared two modes of a su-perconducting cavity in a maximally entangled state. The two modes share a single photon. This entanglement is revealed by a second atom probing, after a delay, the correlations between the two modes. This experiment opens interesting perspectives for quantum information manipulation and fundamental tests of quantum theory.

ar X iv : q ua nt - p h / 06 10 05 5 v 1 9 O ct 2 00 6 Entanglement localization by a single defect in a spin chain

We discuss the effect of a single diagonal defect on both the static and dynamical properties of entanglement in a spin chain. We show that entanglement localizes at the defect and discuss its localization length, arguing that this can be used as a mean to store entanglement. We also show that the impurity site can behave as an entanglement mirror and characterize the bouncing process in terms ...