Maximal tripartite entanglement between singlet-triplet qubits in quantum dots

摘要

We propose an efficient three-qubit gate of singlet-triplet states in quantum dots based on capacitative coupling. This scheme can be used to generate the maximally entangled Greenberger-Horne-Zeilinger state with one simple gate operation. Our simulations using a realistic microscopic model combined with our detailed analysis for the gate operation can be used to extract the actual experimental pulse sequence needed to realize this.