Witnessing Objectivity on a Quantum Computer

TL;DR

This paper investigates how current NISQ quantum computers can be used to experimentally study quantum Darwinism by simulating a solvable stochastic collision model, bridging quantum theory and practical quantum computing.

Contribution

It demonstrates the feasibility of using NISQ devices to simulate quantum Darwinism models, providing a benchmark with an exactly solvable model.

Findings

NISQ devices can simulate quantum Darwinism models effectively.

Benchmarking shows good agreement with analytical solutions.

Supports future experimental exploration of objectivity emergence in quantum systems.

Abstract

Understanding the emergence of objectivity from the quantum realm has been a long standing issue strongly related to the quantum to classical crossover. Quantum Darwinism provides an answer, interpreting objectivity as consensus between independent observers. Quantum computers provide an interesting platform for such experimental investigation of quantum Darwinism, fulfilling their initial intended purpose as quantum simulators. Here we assess to what degree current NISQ devices can be used as experimental platforms in the field of quantum Darwinism. We do this by simulating an exactly solvable stochastic collision model, taking advantage of the analytical solution to benchmark the experimental results.