Adiabatic process

Physics

High fidelity

Statistical physics

Diabatic

Quantum circuit

Parallel computing

Quantum network

Acoustics

Fidelity

Adiabatic quantum computation

Computer science

Quantum computer

Quantum mechanics

Speedup

Telecommunications

Quantum

Physical Review Applied

Shortcuts to adiabaticity are well-known methods for controlling the quantum dynamics beyond the adiabatic criteria, where counter-diabatic (CD) driving provides a promising means to speed up quantum many-body systems. In this work, we show the applicability of CD driving to enhance the digitized adiabatic quantum computing paradigm in terms of fidelity and total simulation time. We study the state evolution of an Ising spin chain using the digitized version of the standard CD driving and its variants derived from the variational approach. We apply this technique in the preparation of Bell and Greenberger-Horne-Zeilinger states with high fidelity using a very shallow quantum circuit. We implement this proposal in the IBM quantum computer, proving its usefulness for the speed up of adiabatic quantum computing in noisy intermediate-scale quantum devices.

Shortcuts to Adiabaticity in Digitized Adiabatic Quantum Computing