# Quantum gate teleportation between separated qubits in a trapped-ion processor

## TL;DR

This paper demonstrates quantum gate teleportation between separated qubits in a trapped-ion processor, showcasing a key step towards scalable quantum computing by combining various advanced ion-trap techniques.

## Contribution

The authors experimentally realize deterministic teleportation of a CNOT gate between spatially separated ions, integrating multiple quantum operations in a scalable trapped-ion architecture.

## Key findings

- Teleportation fidelity between 0.845 and 0.872
- Successful implementation of a deterministic CNOT teleportation
- Integration of ion shuttling with local operations

## Abstract

Large-scale quantum computers will require quantum gate operations between widely separated qubits. A method for implementing such operations, known as quantum gate teleportation (QGT), requires only local operations, classical communication, and shared entanglement. We demonstrate QGT in a scalable architecture by deterministically teleporting a controlled-NOT (CNOT) gate between two qubits in spatially separated locations in an ion trap. The entanglement fidelity of our teleported CNOT is in the interval [0.845, 0.872] at the 95% confidence level. The implementation combines ion shuttling with individually-addressed single-qubit rotations and detections, same- and mixedspecies two-qubit gates, and real-time conditional operations, thereby demonstrating essential tools for scaling trapped-ion quantum computers combined in a single device.