Graphene Quantum Sensors

Quantum sensors are the most direct application of current quantum technologies.

They have shown improvement in magnetic sensors, atomic clocks, gravimeters, accelerometers, geolocalization, gas detection, imaging resolution and biomedical sensors.

Nevertheless, a concrete incorporation of quantum sensors to the every day life requires to overcome fundamental challenges, such as robustness to the environmental noise and integration to the current technology.Here I show how to probe graphene for quantum sensing magnetic fields.

Putting together the tools of high-harmonic spectroscopy with quantum metrology, I propose a framework capable of quantifying solid-state systems for sensing applications.Solid state materials have unique quantum features, due to their extreme sensibility to the boundary conditions. Other effects, such as superconductivity, appear in strongly correlated materials, such as twisted bilayer graphene.

Analysing the high-harmonic spectroscopy in twisted bilayer graphene allows to propose experimental settings to detect its phases of matter, electronic localisation and band structure.In this proposal I describe why graphene has the potential of working as a robust magnetic field quantum sensor.

Currently, the techniques of quantum metrology and parameter estimation, allow to quantify for the first time the performance of materials in presence of of incident external fields.

Here I propose to use this framework, to determine the performance of single layer and twisted bilayer graphene in presence of magnetic fields, and compare it to the available quantum sensors in the market.

In this process, it is possible to pin down the key features in graphene for measuring these fields.Combining the results of fundaments of quantum metrology with high-harmonic spectroscopy gives a complete analysis of the performance of graphene together with a experimental proposal to detect its key features, probing twisted bilayer graphene as a robust quantum sensor.