# Quantum Fisher Information of W and GHZ State Superposition Under Decoherence

## TL;DR

This paper investigates how quantum Fisher information (QFI) for superpositions of W and GHZ states varies under different decoherence channels, revealing the impact of noise parameters on quantum information measures.

## Contribution

It extends previous studies by analyzing the effects of various noisy channels on QFI in superposed W and GHZ states, highlighting the influence of decoherence.

## Key findings

- QFI decreases with increasing noise parameters
- Different decoherence channels have distinct impacts on QFI
- Certain channels preserve QFI better than others

## Abstract

We study the changes in quantum Fisher information (QFI) values for one quantum system consisting of a superposition of W and GHZ states. In a recent work [6], QFI values of this mentioned system studied. In this work, we extend this problem for the changes of QFI values in some noisy channels. We show the change in QFI depending on noise parameters. We report interesting results for different type of decoherence channels.

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Source: https://tomesphere.com/paper/1704.07367