Welcome

Development of a Boston-area 50-km fiber quantum network testbed

We designed and deployed a metropolitan-scale quantum network testbed spanning 50 kilometers across the Boston area. This infrastructure can enable distributed quantum computing and sensing applications by connecting quantum nodes over standard optical fiber. The testbed demonstrates the feasibility of practical quantum networks for real-world applications.

A scalable cavity-based spin–photon interface in a photonic integrated circuit

We developed an integrated photonic interface that couples quantum spins to photons using cavity resonators within a monolithic photonic chip. This approach combines the long coherence times of spin qubits with the efficient distribution capabilities of photonic systems. The design is inherently scalable, enabling compact quantum systems with improved speed and efficiency.

Fully packaged multichannel cryogenic quantum memory module

We engineered a fully integrated quantum memory module capable of storing information in multiple quantum channels at cryogenic temperatures. The module co-integrates silicon vacancies in diamond with a scalable silicon nitride photonic platform. This compact, field-deployable design overcomes cryogenic packaging challenges and advances the practical realization of quantum repeaters in distributed quantum networks.

Nonlinear photon pair generation in a highly dispersive medium

Efficient generatiion of entangled photon pairs requires strict phase-matching. In silicon photonics, this is hard for TM-polarized light because of the shape of the waveguide. In our recent work, we showed we can overcome dispersion and generate quantum states of light in the TM-mode.