Simulated quantum process tomography of quantum gates with Rydberg superatoms

TL;DR

This paper numerically simulates quantum process tomography of single- and two-qubit gates using Rydberg superatoms, demonstrating high fidelity in gate operations with optimized STIRAP pulses.

Contribution

It introduces a simulation approach for quantum gate tomography using Rydberg superatoms with optimized STIRAP pulses for high-fidelity quantum operations.

Findings

High-fidelity single-qubit gates achieved

High-fidelity two-qubit gates confirmed

Validation of Rydberg superatoms for quantum computing

Abstract

We have numerically simulated quantum tomography of single-qubit and two-qubit quantum gates with qubits represented by mesoscopic ensembles containing random numbers of atoms. Such ensembles of strongly interacting atoms in the regime of Rydberg blockade are known as Rydberg superatoms. The Stimulated Raman Adiabatic Passage (STIRAP) in the regime of Rydberg blockade is used for deterministic Rydberg excitation in the ensemble, required for storage of quantum information in the collective state of the atomic ensemble and implementation of two-qubit gates. The optimized shapes of the STIRAP pulses are used to achieve high fidelity of the population transfer. Our simulations confirm validity and high fidelity of single-qubit and two-qubit gates with Rydberg superatoms.