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The Quantum Devices Group at UC Berkeley and Berkeley Lab focuses on understanding and developing integrated quantum devices to enable future quantum technologies, and using these systems to gain new insights into quantum dynamics and coherence in nanoscale systems.

Please check out our publications to learn more about our work, and open positions to see how to join our team.

Current research directions

Next-generation superconducting qubits

Superconducting quantum circuits are currently the leading solid-state quantum computing platform. We study and engineer how superconducting qubits interact with defects and phonons to enable protected qubits with longer coherence. Recent topics include:

  • Next-generation superconducting qubits via phononics [Odeh 2025]
  • Microscopic origins of dielectric loss [Zhang 2024] 
  • Interface piezoelectric loss in superconducting qubits [Zhou 2025], [Zhou 2026]
  • Merged-element transmon devices and architectures
  • Two-level system fundamentals
Next-generation superconducting qubits via defect and phonon engineering

Quantum transduction

Quantum hardware, like its classical counterparts, requires interconnects between processing, memory, and communication modules. We investigate emerging materials and novel device architectures to develop high-fidelity quantum transducers between electrical, mechanical, spin, and optical quantum states. Recent topics include:

  • Fundamental limits of electrooptic nonlinearities
  • Resonant quantum optoelectronics (collaboration with Feng Wang)
  • Broadband microwave-to-optical quantum transducers (collaboration with Mengjie Yu)
  • Electromechanical quantum systems
Electrooptic microwave-to-optics quantum transducer

Optically interconnected spin-qubits in silicon photonics

We are developing defects in silicon with atom-like optical and spin properties to enable scalable quantum communication nodes. Recent research topics include:

Optically interconnected spin qubit registers in silicon photonics [Song 2025]