Works on quantum photonics and microwave-to-optical quantum transduction, collaborating on interconnects to link superconducting quantum processors via optical quantum networks.

Studies quantum optics and quantum information with superconducting and hybrid quantum circuits, focusing on modular quantum computing architectures, microwave-to-optical photon transduction, and quantum error mitigation.

Siddiqi's Quantum Nanoelectronics Laboratory develops superconducting quantum circuits and near-quantum-limited parametric amplifiers for qubit readout, quantum feedback, and quantum-enhanced sensing, and directs cross-campus quantum information efforts at Berkeley and LBNL.