33 citations · 57 across the 4 of their papers we have counts for
4 papers
Universal Hamiltonian control in a planar trimon circuit
Vivek Maurya, Daria Kowsari, Kumar Saurav +4
Multimode circuits provide an avenue for flexible control of single and multi-qubit gates. In this work we implement a multimode circuit known as a trimon integrated in a planar ge…
Nitrogen Plasma Passivated Niobium Resonators for Superconducting Quantum Circuits
K. Zheng, D. Kowsari, N. J. Thobaben +6
Microwave loss in niobium metallic structures used for superconducting quantum circuits is limited by a native surface oxide layer formed over a timescale of minutes when exposed t…
Fabrication and surface treatment of electron-beam evaporated niobium for low-loss coplanar waveguide resonators
D. Kowsari, K. Zheng, J. T. Monroe +6
We characterize low-loss electron-beam evaporated niobium thin films deposited under ultra-high vacuum conditions. Slow deposition yields films with a high superconducting transiti…
Optical Direct Write of Dolan--Niemeyer-Bridge Junctions for Transmon Qubits
J. T. Monroe, D. Kowsari, K. Zheng +4
We characterize highly coherent transmon qubits fabricated with a direct-write photolithography system. Multi-layer evaporation and oxidation allows us to change the critical curre…