Deterministic teleportation of electrons in a quantum dot nanostructure

TL;DR

This paper proposes an efficient method for deterministic quantum teleportation of electrons in semiconductor quantum dots, optimizing the number of operations needed for reliable quantum state transfer.

Contribution

It introduces a minimal operation protocol for deterministic teleportation in quantum dots, combining group-theoretical analysis with practical implementation strategies.

Findings

Deterministic teleportation requires at least three single-qubit rotations.

Two entangling sqrt(swap) operations are necessary.

The protocol can be implemented using electron spin resonance and exchange interactions.

Abstract

We present a proposal for deterministic quantum teleportation of electrons in a semiconductor nanostructure consisting of a single and a double quantum dot. The central issue addressed in this paper is how to design and implement the most efficient - in terms of the required number of single and two-qubit operations - deterministic teleportation protocol for this system. Using a group-theoretical analysis we show that deterministic teleportation requires a minimum of three single-qubit rotations and two entangling (sqrt(swap)) operations. These can be implemented for spin qubits in quantum dots using electron spin resonance (for single-spin rotations) and exchange interaction (for sqrt(swap) operations).