# Spin states of para-water and ortho-water molecule in gas and liquid phases

## TL;DR

This paper investigates the spin states of water molecules in gas and liquid phases to understand the long-term behavior of water spin isomers, using quantum models and surface interaction assumptions.

## Contribution

It introduces a model where water molecules change from pure to mixed spin states upon interacting with surfaces, applying quantum information concepts.

## Key findings

- Water spin states vary between gas and liquid phases.
- Surface interactions induce mixed spin states.
- The model explains long-term spin isomer behavior.

## Abstract

Spin degrees of freedom of water molecule in gas and liquid state were investigated in order to provide a reasonable answer about the unsolved problem of a long-term behavior of water spin isomers. The approach used involves an assumption that molecules change their spin state from a pure state to a mixed one when they interact with some sorts of adsorbent surface. Some models and conceptions of the quantum information processing were used.