# Efficient accessible bounds to the classical capacity of quantum channels

## TL;DR

This paper introduces a practical method to estimate lower bounds on the classical capacity of quantum channels using minimal measurements and classical optimization, without prior channel knowledge.

## Contribution

It provides a novel approach to assess quantum channel capacity efficiently without full process tomography or prior information.

## Key findings

- Effective for various noisy quantum channels
- Requires only local measurements and classical optimization
- Does not depend on prior channel information

## Abstract

We present a method to detect lower bounds to the classical capacity of quantum communication channels by means of few local measurements (i.e. without complete process tomography), reconstruction of sets of conditional probabilities, and classical optimisation. The method does not require any a priori information about the channel. We illustrate its performance for significant forms of noisy channels.