Quantum entanglement and teleportation of electrons in 1D channels
Wednesday, 11 January 2012, 11:30
Quantum teleportation is one of the most remarkable results of quantum
information processing. It consists in the faithful transfer of an
arbitrary quantum state from one location to another one without prior
knowledge of the state itself by exploiting the power of quantum
entanglement. In the last decade, the great efforts to realize
teleportation devices have lead to successful results in NMR, atomic and
optical systems. However, none of these experimental setups seems to have
the scalability of a semiconductor device.
A proposal for the non-deterministic quantum teleportation of electrons in
an edge channel setup operating in the integer quantum Hall regime will be
presented. The proposed scheme consists of two concatenated two-particle
Hanbury Brown-Twiss (HBT) interferometers [Samuelsson et al., PRL 92,
026805 (2004); Neder et al., Nature, 448, 333 (2007)] and, in analogy with
quantum optics implementations, can be realized by means of linear quantum
We will describe the teleportation protocol based on non-interacting edge
channels [Buscemi et al., arXiv:1109.6551v1] and its theoretical fidelity.
Furthermore we will illustrate numerical simulation of
electron dynamics in coupled 1D channels, where maximally-entangled Bell
states can be obtained.