
Krypton Sputtering Enables Low-Temperature Tantalum Qubits with Record Coherence
Researchers at Cornell University have demonstrated that using krypton instead of argon for sputtering tantalum films allows for the creation of high-performance superconducting quantum devices at significantly lower temperatures. This method achieves a quality factor of 16.9 million for transmon qubits, overcoming previous thermal barriers that hindered scalable manufacturing.





