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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 our publications and recent recorded talks 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 and quantum memories. Recent topics include:

  • Next-generation superconducting qubits via phononics [Odeh 2025]
  • Microscopic origins of dielectric loss [Zhang 2024] 
  • Materials origins of qubit-phonon interactions [Zhou 2025]
  • Merged-element transmon devices and architectures
  • Two-level system fundamentals
A superconducting qubit on a phononic bandgap metamaterial

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 to ultrastrong electrooptic and piezoelectric nonlinearities
  • Resonant quantum optoelectronics
  • Electromechanical quantum systems
  • Next-generation microwave-to-optical quantum transducers with high-bandwidth and fidelity

(January 2026) Postdoc openings for broadband microwave-to-optics quantum transduction (with Mengjie Yu): Interested candidates with experience in superconducting quantum circuits or integrated nonlinear optics are encouraged to reach out to Alp or Mengjie Yu.

A resonant quantum optoelectronic 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:

Indistinguishable photons from a color center in a silicon waveguide