# Sequential nonabsorbing microwave single-photon detector

## TL;DR

This paper introduces a nonabsorbing microwave single-photon detector utilizing an artificial atom and a high-Q resonator, achieving over 98% distinguishability, surpassing previous proposals and compatible with current technology.

## Contribution

It presents a novel nonabsorbing detection scheme that outperforms existing methods in photon distinguishability using a single artificial atom.

## Key findings

- Achieves over 98% photon distinguishability
- Compatible with current technology levels
- Outperforms similar detector proposals

## Abstract

We propose a nonabsorbing microwave single-photon detector that uses an artificial atom as a coherent interaction mediator between a traveling photon and a high-Q resonator, fully exploiting the knowledge of the photon's arrival time. Our proposal can be implemented with the current level of technology and achieves distinguishability (probability of distinguishing between zero and one photon) in excess of 98% for realistic parameters. This is better than any of the similar detector proposals, even the ones using several artificial atoms.