Teleportation with two-dimensional electron gas formed at the interface of a GaAs heterostructure

摘要

Inspired by the scenario by Bennett et al., a teleportation protocol ofqubits formed in a two-dimensional electron gas formed at the interface of aGaAs heterostructure is presented. The teleportation is carried out using threeGaAs quantum dots (say $\mathcal{P}\mathcal{P}'$, $\mathcal{Q}\mathcal{Q}'$,$\mathcal{R}\mathcal{R}'$) and three electrons. The electron spin on GaAsquantum dots $\mathcal{P}\mathcal{P}'$ is used to encode the unknown qubit. TheGaAs quantum dot $\mathcal{Q}\mathcal{Q}'$ and $\mathcal{R}\mathcal{R}'$combine to form {an} entangled state. Alice (the sender) performs a Bellmeasurement on pairs ($\mathcal{P},\mathcal{Q}$) and($\mathcal{P}',\mathcal{Q}'$). Depending on the outcome of {the} measurement, asuitable Hamiltonian for the quantum gate can be used by Bob (receiver) totransform the information based on {a} spin to charge-based information. Thiswork offers relevant corrections to misconception in {\it Chem. Phys. Lett.{\bf421} (2006) 338.