The Zhang Lab at Columbia University

Our group leverages the unique advantages of qubit-photon interactions to advance the frontiers of quantum science and technology. We focus on introducing new capabilities, such as high levels of connectivity, into superconducting circuits and solid-state spin platforms by integrating these qubits with microwave waveguides and silicon photonics. This foundation enables us to explore novel possibilities in basic science, such as many-body quantum simulation and quantum topological photonics, as well as pushing the boundaries of quantum computing and networking technologies.

See Research for details.

Latest News

Paper Published in Nature Nanotechnology!

Prof. Zhang and Berkeley team's work in Nature Nanotechnology demonstrates a three-qubit quantum register in silicon photonics. We integrated T centers into photonic waveguides and achieved entanglement between nuclear spins with long coherence times, showing promise for quantum communication networks. πŸŽ‰

2025-12-09

Group Dinner β€” Finishing 2025 Strong!

We wrapped up 2025 with a wonderful group dinner to celebrate a year of hard work, creativity, and teamwork. Huge thanks to every member for the dedication and resilience that made this year a success. We are proud of what we built together and excited to carry this momentum into the new year. Looking forward to an even stronger 2026! πŸ₯‚βœ¨

2025-12-18

Paper Published in PRX Quantum!

Prof. Zhang and Berkeley team's work in PRX Quantum explores the stability of T centers in silicon photonic cavities. We show that their emission remains stable for milliseconds in the dark, but laser light itself drives spectral diffusion. These insights point to strategies for producing indistinguishable photons, a key step toward scalable quantum networks. πŸŽ‰

2025-09-16

Welcome New Lab Members!

We’re excited to welcome new members to the Zhang Lab this summer and fall! πŸŽ‰ Joining us are postdocs Ahmed Shariful Alam and Dongseob Kim, PhD student Jaewon Jung, master’s students Chennan (Leo) He and Ken Loong Oi, and undergraduate researchers Benjamin Proothi and Shawn Hans Kathuria. Thrilled to have you all on board as we start an exciting new semester of research and discovery!

2025-09-01

Paper Published in Optica!

Prof. Zhang and Berkeley team's work in Optica demonstrates bus-coupled silicon photonic cavities hosting T centers. We show frequency-multiplexed operation and hybridized cavity modes, pointing to scalable routes for entanglement distribution in quantum networks. πŸŽ‰

2025-08-26

Prof. Zhang Selected as Scialog Fellow!

Prof. Zhang has been named a Scialog Fellow in Quantum Matter and Information πŸŽ‰. This program brings together early-career researchers across physics, chemistry, materials science, and engineering to spark new collaborations and tackle fundamental questions in quantum science and technology.

2025-07-01

PI: Xueyue (Sherry) Zhang
Email: zhang.xueyue@columbia.edu

We are located in the Schapiro Center for Engineering and Physical Science Research (CEPSR) at Columbia University.
530 W 120th St, New York, NY 10027