  Electron spin s in semiconductor quantum dot s have been intensively studied
for implementing quantum computation and high fidelity single and two qubit
operation s have recently been achieved . Quantum teleportation is a three
qubit protocol exploiting quantum entanglement and it serv es as a n essential
primitive for more sophisticated quantum algorithm s Here, we demonstrate a
scheme for quantum teleportation based on direct Bell measurement for a single
electron spin qubit in a triple quantum dot utilizing the Pauli exclusion
principle to create and detect maximally entangled state s . T he single spin
polarization is teleported from the input qubit to the output qubit with a
fidelity of 0.9 1 We find this fidelity is primarily limited by singlet triplet
mixing which can be improved by optimizing the device parameters Our results
may be extended to quantum algorithms with a larger number of se miconductor
spin qubit s
