Protected Rabi oscillation induced by natural interactions among physical qubits

TL;DR

This paper demonstrates that natural interactions among nine physical qubits can induce protected Rabi oscillations of a logical qubit without fine tuning, and proposes a protocol to safeguard this evolution against single-qubit errors.

Contribution

It introduces a method to realize and protect logical Rabi oscillations using natural qubit interactions without parameter fine tuning or interaction switching.

Findings

Natural interactions induce logical Rabi oscillations at discrete times.

The proposed protocol protects against all single-qubit errors.

The method offers a simple, realistic approach to noise-resistant quantum evolution.

Abstract

For a system composed of nine qubits, we show that natural interactions among the qubits induce the time evolution that can be regarded, at discrete times, as the Rabi oscillation of a logical qubit. Neither fine tuning of the parameters nor switching of the interactions is necessary. Although straightforward application of quantum error correction fails, we propose a protocol by which the logical Rabi oscillation is protected against all single-qubit errors. The present method thus opens a simple and realistic way of protecting the unitary time evolution against noise.