Correcting noisy quantum gates with shortcuts to adiabaticity

TL;DR

This paper presents a method to implement high-fidelity quantum gates using counterdiabatic control, effectively mitigating non-adiabatic and noise effects in open quantum systems.

Contribution

It introduces a locally driven Hamiltonian approach to generate CNOT gates and demonstrates counterdiabatic control's effectiveness in noisy environments.

Findings

Counterdiabatic control restores gate fidelity in noisy conditions.

Near-perfect fidelities achieved in open quantum systems.

Method applicable to practical quantum computing implementations.

Abstract

Unitary quantum gates constitute the building blocks of Quantum Computing in the circuit paradigm. In this work, we engineer a locally driven two-qubit Hamiltonian whose instantaneous ground-state dynamics generates the controlled-NOT (CNOT) quantum gate. In practice, quantum gates have to be implemented in finite-time, hence non-adiabatic and external noise effects debilitate gate fidelities. Here, we show that counterdiabatic control can restore gate performance with near perfect fidelities even in open quantum systems subject to decoherence.