Ansari's Research group 

Dr. Mohammad Ansari 

Principal Investigator (PI)

• Office: Forschungszentrum Jülich GmbH, Peter Grünberg Institute (PGI-12), Building 04.9, Room: 28

• Email: [m.ansari]   -AT-   [fz-juelich.de]

Ms. Dr. Kuljeet Kaur 

Postdoctoral fellow

I am a theoretical physicist specializing in circuit QED. 

My research is centered on the theoretical modeling of circuit QED systems with superconducting qubits. 

I focus on exploring the entanglement properties of these systems and scaling quantum systems using analytical and numerical methods.

More about me on LinkedIn

• Office 1: Forschungszentrum Jülich GmbH, Peter Grünberg Institute (PGI-2), Building 04.8, Room 364

• Email:   k.kaur  -AT-  [fz-juelich.de]
  
  

Mr. Zhongyi  Jiang 

PhD student at RWTH Aachen

My PhD research focuses on designing and modeling superconducting qubits and gates. We have proposed concurrent parametric fSim gates and are now developing a general theory of two- and multi-mode couplers.

In parallel, I’m working on a startup project to build a cloud quantum computing platform that makes quantum technologies more accessible. For example, we developed a GPT-QAOA algorithm, where a generative model learns to produce optimal QAOA circuits, and built a graphical user interface around it. The second quantum revolution is here, and I’m excited to contribute to it. Happy to connect!

• Office: RWTH Aachen, Institute for Quantum Information, Modulbau 1, Room 103

• Email:  [zh.jiang]  -AT-   [fz-juelich.de]

Ms. Siyu Wang

PhD student at RWTH Aachen

I completed my master’s degree in Applied Physics from TU Delft, where I conducted my thesis research in the Andersen Lab at QuTech. My work focused on the design and simulation of high-fidelity two-qubit gates using a tunable coupler for fluxonium qubits.   Following a break, I joined the Ansari Lab in December 2024 as a PhD student. 

My current research centers on developing theoretical models for large-scale superconducting devices. By combining my expertise in quantum gate design and machine learning, I aim to contribute to the advancement of scalable quantum technologies.

• Office 1: RWTH Aachen, Institute for Quantum Information, Modulbau 1, Room 103

• Office 2: Forschungszentrum Jülich GmbH, Peter Grünberg Institute (PGI), Building 04.8, Room 267

• Email:    si.wang  -AT-   [rwth-aachen.de]

Ms. Ruiqi Gao 

Internship student (remote)

"My primary focus lies in QML, particularly in optimizing strategies to characterize qubit couplings."

• Office

• Email: 

• LinkedIn

Mr. Julian Rapp 

MSc student at RWTH Aachen ---> Moved to Institut für Laserphysik at University of Hamburg as PhD student

I am interested in the interplay between quantum mechanics and thermodynamics and effects arising from it, as well as possible applications of those, mainly in quantum computing. In my Master’s thesis, I am working on the evaluation of entropy production in open systems, with a focus on investigating strong reservoir coupling.

Mr. Alwin van Steensel 

PhD student at RWTH Aachen --->Moved to University of Rotterdam, Netherlands

I'm interested in quantum thermodynamics and in my Ph.D. project, I'm calculating quantum effects in entropy production of thermodynamic processes. For example in the operation of a quantum heat engine, which is a large part of my focus. But in principle, I find any fundamental physics greatly interesting and enjoyable to learn about.

More about me on LinkedIn

Ms. Chloe Vignes - Master's student [Defended Sep 2023] ----> Moved to PhD position at MIT, USA

My project resides at the crossroads of Machine Learning and circuit quantum electrodynamics for superconducting qubits. It endeavors to harness the capabilities of quantum computers to orchestrate particle dynamics.

• Thesis title: Making particles with qubits

Theses page.

Mr. Rahul Bhowmick  - Master's student, Indian Institute of Science Education and Research in Kolkata, India [Defended July 2023] ---> Now Fujitsu Research Lab in India, in the role of Quantum Researcher

I am working on cavity quantum electrodynamics, specifically in the context of cat qubits and how they are useful for gate-based quantum computation. In my free time, I like traveling around and watching tv series.

• Thesis title: Implementing Mulit-qubit Gates in Cat Qubits Theses page

Mr. Jennifer  Duscha - Masters student at Saarland University (co-advising) [Defended 2023]

I am currently working on my master thesis on Multi-local interactions for gate-model quantum computing. One goal is to figure out how well do these interactions perform in order to implement direct 3- and 4-qubit gates.

Ms. Josephine Pazem - Masters at RWTH Aachen [Defended May 2022]

As part of my master project, I am studying Quantum Neural Networks for noise cancellation. My goals include simulating networks of increasing sizes, exploring their behaviors in relation to their quantum properties, for example entanglement, and implementing them on actual devices to better their performances.

• Thesis title: Denoising with Quantum Machine Learning Theses page

Mr. Xuexin Xu - PhD student at RWTH Aachen, [Defended in 2021] ---> Moved to Postdoc position at Forschungszentrum Jülich, Germany

I’m interested in building up theoretical models that are useful and accurate for the purpose of scaling up the number of qubits in superconducting circuits. The ultimate goal is to make faster quantum processors with less crosstalk and higher fidelity.

More about me on LinkedIn

• Thesis title: Modeling and Suppressing Unwanted Parasitic Interactions in Superconducting Circuits, Theses page

Dr. Amin Hosseinkhani - Postdoc (2019) at Forschungszentrum Juelich PGI-2  -----> Moved to IQM Munich, Germany

Heat conduction in superconducting nanowires