# Measurement and preparation protocols for quantum field theory on curved spacetimes

## TL;DR

This paper discusses measurement protocols for quantum fields in curved spacetimes, proving local observables can be measured locally and proposing a method to prepare specific quantum states in spacelike separated regions.

## Contribution

It introduces a proof that all local observables are accessible via local measurement schemes and presents a protocol for preparing Hadamard states in quantum field theory on curved spacetimes.

## Key findings

- All local observables can be obtained from local measurement schemes
- A protocol for preparing Hadamard local product states is described
- Work in progress on measurement theory of quantum fields in curved spacetimes

## Abstract

In this conference proceedings contribution, I describe work in progress concerning two problems in the measurement theory of quantum fields. First, it is proved that all local observables can be obtained from local measurement schemes. Second, I describe a protocol for preparing a Hadamard local product state of given Hadamard states relative to the local algebras of specified spacelike separated regions.