Denis JANKOVIC

Denis JANKOVIC

PhD student in co-supervision, Ultrafast Optics and Nanophotonics (DON)denis.jankovic@ipcms.unistra.fr
Tél: /Bureau: 2206

Current Research

Study of the Hyperfine Interactions in Lanthanide-Organic Complexes for Quantum Information Processing

Qudits vs. qubits : Conditions on Gate Efficiency

One of the big challenges in the field of quantum computing is to increase computing capacity by increasing the number of qubits. Scientists are therefore exploring an alternative called qudits, which are similar to qubits but with more than two available levels. However, due to these additional levels, they may have more paths vulnerable to errors. The objective of the study is therefore to investigate whether qudits are still competitive with qubits for handling errors arising from the environment. The study showed that qudits can be a promising option for quantum information processing in the future, especially if associated with specialized error correction methods.

University Background

2020 – current : PhD Student | IPCMS | Department of Ultrafast Optics and Nanophotonics | QDYNO Group
Supervisor : Paul-Antoine Hervieux
Cotutelle : Mario Ruben, KIT, Karlsruhe, Germany

2019 : M1 Internship | Faculty of Physics – University of Basel | Condensed Matter Theory & Quantum Computing Group | Supervisors : Prof. Dr. Daniel Loss – Dr. Marko Rancic

Links

Academic Background

2018 – 2020 : MSc Condensed Matter and Nanophysics | University of Strasbourg

2016 – 2018 : BSc in Physics | University of Strasbourg

2016 – 2017 : Two-years degree Mathematics & Physics | University of Strasbourg

2015-2016 : Prep Classes for Engineering Schools : Physics & Chemistry| Lycée Kléber, Strasbourg

2015 : High School Diploma | Lycée Jean Mermoz, Saint-Louis

Publications

  • by Hoang-Anh Le, Saba Taherpour, Denis Janković, Christoph Wolf
    Recent experiments demonstrated that the spin state of individual atoms on surfaces can be quantum-coherently controlled through all-electric electron spin resonance. By constructing interacting arrays of atoms this results in an atomic-scale qubit platform. However, the static exchange coupling between qubits, limited lifetime and polarization of the initial state, impose […]
  • by Denis Janković, Jean-Gabriel Hartmann, Paul-Louis Etienney, Killian Lutz, Yannick Privat, Paul-Antoine Hervieux
    We introduce the MAGICARP algorithm, a numerical optimization method for quantum optimal control problems that combines the structure provided by Pontryagin's Maximum Principle (PMP) and the robustness of gradient ascent techniques, such as GRAPE. MAGICARP is formulated as a "shooting technique", aiming to determine the appropriate initial adjoint momentum to […]
  • by Denis Janković, Rémi Pasquier, Jean-Gabriel Hartmann, Paul-Antoine Hervieux
    This study explores the applications of the Prouhet-Thue-Morse (PTM) sequence in quantum computing, highlighting its mathematical elegance and practical relevance. We demonstrate the critical role of the PTM sequence in quantum error correction, in noise-resistant quantum memories, and in providing insights into quantum chaos. Notably, we demonstrate how the PTM […]
  • by Hao Chen, Alfio Borzì, Denis Janković, Jean-Gabriel Hartmann, Paul-Antoine Hervieux
    The Lindblad equation is a widely used quantum master equation to model the dynamical evolution of open quantum systems whose states are described by density matrices. These solution matrices are characterized by semi-positiveness and trace preserving properties, which must be guaranteed in any physically meaningful numerical simulation. In this paper, […]
  • by Jean-Gabriel Hartmann, Denis Janković, Rémi Pasquier, Mario Ruben, Paul-Antoine Hervieux
    High-dimensional quantum computing has generated significant interest due to its potential to address scalability and error correction challenges faced by traditional qubit-based systems. This paper investigates the Average Gate Fidelity (AGF) of single qudit systems under Markovian noise in the Lindblad formalism, extending previous work by developing a comprehensive theoretical […]