# Conversion of Thermal Equilibrium States into Superpositions of Macroscopically Distinct States

## TL;DR

This paper proposes a simple method to convert thermal equilibrium states into superpositions of macroscopically distinct states through a single global measurement, applicable at various temperatures and feasible experimentally.

## Contribution

It introduces a novel procedure for generating macroscopic superpositions from thermal states using a single measurement of a macroscopic observable.

## Key findings

- Thermal states can be transformed into superpositions via global measurement.
- High-resolution measurements yield higher probability of superposition creation.
- The method is experimentally feasible across different temperature regimes.

## Abstract

A simple procedure for obtaining superpositions of macroscopically distinct states is proposed and analyzed. We find that a thermal equilibrium state can be converted into such a state when a single global measurement of a macroscopic observable, such as the total magnetization, is made. This method is valid for systems with macroscopic degrees of freedom and finite (including zero) temperature. The superposition state is obtained with a high (low) probability when the measurement is made with a high (low) resolution. We find that this method is feasible in an experiment.