Tyler Whyland, Ani Nersisyan, Stefano Poletto, Nasser Alidoust, Riccardo Manenti, Russ Renzas, Cat-Vu Bui, Kim Vu, Yuvraj Mohan, Eyob A. Sete, Sam Stanwyck, Andrew Bestwick, and Matthew Reagor, Rigetti Computing
We discuss a variety of techniques shown to increase lifetimes for superconducting qubits. We investigated specific combinations of previously reported fabrication techniques on the quality of hundreds of thin film superconducting resonators and qubits. We report that multiple small improvements together can produce qubits having T1 ≥ 110 μs.