# Weak measurement of quantum superposition states in graphene

## TL;DR

This paper demonstrates the existence of quantum superposition states in graphene using a novel weak measurement approach, providing a new method to probe quantum states in 2D materials.

## Contribution

It introduces an optical two-beam setup and explicit formulas for detecting superposition states in graphene via weak measurement techniques.

## Key findings

- Detection of interband superposition states in graphene.
- Derived explicit formula for differential optical absorption.
- Interpretation using non-Markovian weak measurement formalism.

## Abstract

We employ a weak measurement approach to demonstrate the very existence of the photoexcited interband superposition states in intrinsic graphene. We propose an optical two-beam setup where such measurements are possible and derive an explicit formula for the differential optical absorption that contains a signature of such states. We provide an interpretation of our results in terms of a non-Markovian weak measurement formalism applied to the pseudospin degree of freedom coupled with an electromagnetic wave.