Alp Sipahigil (Advisor)

Color centers in silicon are promising building blocks for photonic quantum processors. The T center, with its long spin coherence and telecom-band optical transitions, is a particularly compelling candidate for quantum repeater and memory applications. However, the impact of local charges and spins introduced during device integration remains poorly understood. In this work, we develop a silicon photonics platform that enables probing of single T centers under applied electric and magnetic fields, allowing systematic investigation of Stark shifts and ionization dynamics. These...

Point defects in crystalline materials can introduce localized defects states with optical transitions, creating color centers. Color centers in silicon have recently shown their potential as telecom-band single photon emitters. Leveraging the mature semiconductor fabrication techniques, silicon color centers can be fabricated on a large scale and are compatible with integrated photonics. Among all the silicon color centers investigated so far, T centers provide a spin-photon interface suitable for quantum networking and communication applications. In this project, we demonstrate coherent...

Superconducting qubits are among the most promising platforms for realizing fault-tolerant, large-scale quantum computers. Despite rapid progress, challenges remain in extending coherence times and improving connectivity. Hybrid quantum systems that couple superconducting circuits to mechanical resonators provide a promising route to scalability. Notably, silicon nanomechanical resonators offer ultra-long lifetimes, and superconducting circuits interfaced with optomechanical cavities can enable microwave-to-optics quantum transduction. However, existing approaches that rely on...