Quantum Device Theory (QDT) Group 🐝
Updates:💡    

• 🐥 npj Quantum Information 12, 71 (2026): Xuexin Xu, Kuljeet Kaur, Chloé Vignes, John M. Martinis & Mohammad H. Ansari  Surface-code hardware Hamiltonian  (April 2026)

• 🐥 Phys. Rev. Applied 25, 044045 (2026): Xuexin Xu, Siyu Wang, Radhika Joshi, Rihan Hai, Mohammad H. Ansari Multiqubit gate based on parity cross resonance (April 2026)

• Quantum Devices with Left-Handed Ring Resonators, Britton Plourde, Mohammad Ansari, Tianna McBroom, Xuexin Xu, Arne Schlabes, US Patent 18225837 (Oct 2025)

• Enabling full localization of qubits and gates with a multi-mode coupler,   Zhongyi Jiang, Simon Geisert, Sören Ihssen, Ioan M. Pop, Mohammad H. Ansari.  arXiv.2509.26211   Public Summary (Oct 2025)

• Parity Cross Resonance (PCR): A Multi-Qubit Gate,   X. Xu, S. Wang, R. Joshi, R. Hai, M. H. Ansari arXiv:2508.10807  Public Summary   (Aug 2025)

• Information Transport in Classic-Quantum Hybrid System,    J. Rapp, R. Joshi, A. van Steensel, Yuli Nazarov & M. H. Ansari arXiv:2508.07870  Public Summary (11 Aug 2025) 

• Surface-Code Hardware Hamiltonian,    X. Xu, K. Kaur, C. Vignes, M.H. Ansari &  John M. Martinis,  arxiv:2507.06201 Public Summary  (Aug 2025)

• Concurrent fermionic simulation gate,  Zhongyi Jiang & Mohammad Ansari  Phys. Rev. Applied 24, 024050 (2025) DOI  Public Summary (Aug 2025)

• Intermediate State Formation of Topologically Associated Chromatin Domains using Quantum Annealing, Tobias Kempe, Ali Tabei & M.H. Ansari  arXiv:2505.23289   Public Summary  (June 2025)

• Our "Quantum Device Theory" group page at Forschungszentrum Jülich (Mar 2025)
  
  

• Error mitigation in brainbox quantum autoencoders     Joséphine Pazem and Mohammad H. Ansari published " in Scientific Reports  DOI   Public Summary  (Feb 2025)

• A new PhD student joined our team. Welcome on board Ms. Siyu Wang! (Dec 2024)

• Lattice Hamiltonians and stray interactions within quantum processors     X. Xu, Manabputra, C. Vignes, M. Ansari & John M. Martinis, Phys. Rev. Applied DOI   Public Summary  (Dec 2024)

• Fast Gates of Detuned Cat Qubit    Arne Schlabes, Rahul Bhowmick & M. H. Ansari arxiv:2407.20820 (Aug 2024)

• A new Postdoc joined our team, Welcome on board Dr. Kuljeet Kaur! (July 2024)

• ...older news.
  
  

Reseserch topics:

• • Scalable superconducting qubits (models, theory, and foundation),

  • New frontiers in quantum error correction and error mitigation with advantages for computing

  • Many body simulation on large quantum processors and new phases of matter

  • Quantum sensing and modern circuit quantum electrodynamics

  • Correspondence between information and physics

  • Solid-state quantum devices, e.g. topological phase slip, photovoltaic cells, light-harvesting photosynthetic complexes, etc.,

  • Quantum field theory and non-equilibrium statistical physics,

  • more about quantum information and computing in our institute ...,
    
    
    

Group Members

Group Meetings

Publications