Towards the Heisenberg limit in microwave photon detection by a qubit array

TL;DR

This paper demonstrates that a qubit array detector can reach the Heisenberg limit in microwave photon detection, enhancing quantum sensing and communication capabilities in the microwave spectrum.

Contribution

It introduces an analytically solvable model showing how qubit arrays can achieve the Heisenberg limit in photon detection, a significant advancement in quantum measurement.

Findings

Qubit array detectors can reach the Heisenberg limit in microwave photon detection.

Superconducting qubits enable new quantum sensing and communication applications.

The model provides a pathway for practical implementation of high-precision quantum detectors.

Abstract

Using an analytically solvable model, we show that a qubit array-based detector allows to achieve the fundamental Heisenberg limit in detecting single photons. In case of superconducting qubits, this opens new opportunities for quantum sensing and communications in the important microwave range.