# Accelerating adiabatic protocols for entangling two qubits in circuit QED

## TL;DR

This paper presents a method to accelerate adiabatic entanglement protocols in circuit QED, achieving faster operation while maintaining high fidelity and robustness against errors and decoherence.

## Contribution

It introduces a technique that adds fast oscillations to adiabatic sweeps, significantly speeding up entanglement protocols in circuit QED systems.

## Key findings

- Substantial speedup over existing adiabatic methods.
- Effective beyond the rotating-wave approximation.
- Robustness against static biases and decoherence.

## Abstract

We introduce a method to speed up adiabatic protocols for creating entanglement between two qubits dispersively coupled to a transmission line, while keeping fidelities high and maintaining robustness to control errors. The method takes genuinely adiabatic sweeps, ranging from a simple Landau-Zener drive to boundary cancellation methods and local adiabatic drivings, and adds fast oscillations to speed up the protocol while canceling unwanted transitions. We compare our protocol with existing adiabatic methods in a state-of-the-art parameter range and show substantial gains. Numerical simulations emphasize that this strategy is efficient also beyond the rotating-wave approximation and that the method is robust against random static biases in the control parameters and with respect to damping and decoherence effects.