Shortcut-to-Adiabatic Controlled-Phase Gate in Rydberg Atoms

Abstract

A shortcut-to-adiabatic protocol for the realization of a fast and high-fidelity controlled-phase gate in Rydberg atoms is developed. The adiabatic state transfer, driven in the high-blockade limit, is sped up by compensating nonadiabatic transitions via oscillating fields that mimic a counterdiabatic Hamiltonian. High fidelities are obtained in wide parameter regions. The implementation of the bare effective counterdiabatic field, without original adiabatic pulses, enables to bypass gate errors produced by the accumulation of blockade-dependent dynamical phases, making the protocol efficient also at low blockade values. As an application toward quantum algorithms, how the fidelity of the gate impacts the efficiency of a minimal quantum-error correction circuit is analyzed.

Version 2 corrects a typo of a factor 2 in appendix A

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Cited by in corpus (8)

• Counterdiabatic Driving for Periodically Driven Systems
• Atomic Quantum Technologies for Quantum Matter and Fundamental Physics Applications
• High-fidelity and robust controlled-Z gates implemented with Rydberg atoms via echoing rapid adiabatic passage
• Accelerated creation of NOON states with ultracold atoms via counterdiabatic driving
• Comparison of Two Optimization Methods for a Rydberg Quantum Gate
• Reversing adiabatic state preparation in few-level quantum systems
• Multimode NOON-state generation with ultracold atoms via geodesic counterdiabatic driving
• Symmetric $C_Z$ gate for ultracold neutral atoms based on counterdiabatic driving at Rydberg excitation