Electrically tunable quantum interfaces between photons and spin qubits in carbon nanotube quantum dots

TL;DR

This paper proposes a novel electrically tunable quantum interface using carbon nanotube quantum dots for efficient interconversion between photonic and spin qubits, advancing quantum network technology.

Contribution

It introduces a new scheme combining optomechanical resonators and spin-orbit interactions in nanotubes for electrical control of quantum state transfer.

Findings

Numerical evaluation of state transfer processes.

Estimation of coupling strength effects on fidelity.

Foundation for all-electrical quantum network control.

Abstract

We present a new scheme for quantum interfaces to accomplish the interconversion of photonic qubits and spin qubits based on optomechanical resonators and the spin-orbit-induced interactions in suspended carbon nanotube quantum dots. This interface implements quantum spin transducers and further enables electrical manipulation of local electron spin qubits, which lays the foundation for all-electrical control of state transfer protocols between two distant quantum nodes in a quantum network. We numerically evaluate the state transfer processes and proceed to estimate the effect of each coupling strength on the operation fidelities.