7 papers
A K-band Kinetic Inductance Parametric Amplifier Near the Quantum Limit
Chaofan Wang, Shihan Liu, Yufeng Wu +4
Advancing superconducting quantum devices to higher operating frequencies broadens their functionality and enables operation at elevated temperatures, but it also requires near-qua…
Simultaneous Type-0 and Type-I Optical Parametric Oscillation in Submicron Poled Thin-Film Lithium Niobate
Fengyan Yang, Hong X. Tang
We demonstrate dual optical parametric oscillations in a thin-film lithium niobate microring resonator enabled by polarization-insensitive submicron periodic poling. Under degenera…
Collective Strong Coupling of Thermal Atoms to Integrated Microring Resonators
Xiaoyu Cheng, Benyamin Shnirman, Alexandra Köpf +5
Strong coupling between atomic ensembles and high-quality optical cavities enables collective and nonlinear phenomena that are central to cavity quantum electrodynamics (cQED). Alt…
Loss Mechanisms in Cryogenic Microwave Epitaxial AlN Resonators
Hemant Gulupalli, Navnil Choudhury, Jiacheng Xie +6
Epitaxial aluminum nitride (AlN) thin-film bulk acoustic resonators (FBARs) enable low loss filtering for future 6G systems. They also provide a compact approach for qubit sensing…
A frequency-agile microwave-optical interface for superconducting qubits
Yufeng Wu, Yiyu Zhou, Haoqi Zhao +4
Superconducting quantum processors operate at microwave frequencies in millikelvin environments, making it challenging to interconnect distant nodes using conventional microwave wi…
Hidden Structural Variants in ALD NbN Superconducting Trilayers Revealed by Atomistic Analysis
Prachi Garg, Danqing Wang, Hong X. Tang +1
Microscopic inhomogeneity within superconducting films is a critical bottleneck hindering the performance and scalability of quantum circuits. All-nitride Josephson Junctions (JJs)…
All-nitride superconducting qubits based on atomic layer deposition
Danqing Wang, Yufeng Wu, Naomi Pieczulewski +6
The development of large-scale quantum processors benefits from superconducting qubits that can operate at elevated temperatures and be fabricated with scalable, foundry-compatible…