Generation of entangled channels for perfect teleportation channels using multi-electron quantum dots

Details Generation of entangled channels for perfect teleportation channels using multi-electron quantum dots Generation of entangled channels for perfect teleportation channels using multi-electron quantum dots

2008-07-06

arxiv.org/abs/0807.0907v1

Phys. Rev. A 78, 042328 (2008)

Physics

Quantum Physics

6 pages, 3 figures

Scientific paper

10.1103/PhysRevA.78.042328

In this work we have proposed a scheme for generating $N$ qubit entangled states which can teleport an unknown state perfectly. By switching on the exchange interaction ($J$) between the qubits one can get the desired states periodically. A multi electron quantum dot can be a possible realization for generating such $N$ qubit states with high fidelity. In the limit of $N \to \infty$, there exists a unique time $t=\frac{1}{J}\cos^{-1}(-1/8)$ where the Hamiltonian dynamics gives the $N$ qubit state that can assist perfect teleportation. We have also discussed the effect of the nuclear spin environment on the fidelity of teleportation for a general $N$ qubit entangled channel.

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