---
title: "Physics-informed Tracking of Qubit Fluctuations"
date: "2024-09-02T09:07:00+00:00"
url: "https://www.quantum-machines.co/resources/videos/physics-informed-tracking-of-qubit-fluctuations-2/"
description: "In this latest research from Prof. Ferdinand Kuemmeth's lab at NBI, a physics-informed and real-time Hamiltonian estimation protocol is applied to a qubit. This protocol estimates the fluctuating environment of a spin qubit (a nuclear spin bath) on-the-fly on the OPX quantum controller, by updating its probability distribution according to the model describing the nuclear spins (Fokker-Planck equation). It is further improved by adaptively choosing the probing time of the qubit based on the previous measurement outcomes, to maximize the information gathered per measurement (arXiv:2404.09212)."
---

# Physics-informed Tracking of Qubit Fluctuations

 Video September 2024

# Physics-informed Tracking of Qubit Fluctuations

In this latest research from Prof. Ferdinand Kuemmeth’s lab at NBI, a physics-informed and real-time Hamiltonian estimation protocol is applied to a qubit. This protocol estimates the fluctuating environment of a spin qubit (a nuclear spin bath) on-the-fly on the[ ](https://quantummachinesp.kinsta.cloud/resources/brochures/opx/)OPX quantum controller, by updating its probability distribution according to the model describing the nuclear spins (Fokker-Planck equation). It is further improved by adaptively choosing the probing time of the qubit based on the previous measurement outcomes, to maximize the information gathered per measurement (arXiv:2404.09212).

### **The agenda included two parts:**

- Part I (Fabrizio Berritta, NBI): Overview of the latest research from Ferdinand’s lab at NBI.
- Part II (Fabio Ansaloni, QM): Quantum dots research with OPX and QDAC use case.

[Watch the video](https://qm.quantum-machines.co/physics-informed-tracking-of-qubit-fluctuations)