Correcting noisy quantum gates with shortcuts to adiabaticity
Moallison F. Cavalcante, Barış Çakmak, Marcus V. S. Bonança, Sebastian Deffner · Europhysics Letters (EPL) · 2025
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 nonadiabatic 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.