Traveling-wave parametric device amplifies microwave signals; shields qubits from unwanted noise by converting frequencies of backward signals

https://phys.org/news/2025-09-device-amplifies-shielding-qubits-unwanted.html

"qubits measured by resonator, readout uses weak electromagnetic wave then amplified... no bulky/ magnetic components controlling signal detection/ protecting qubits from backaction noise... lumped-element capacitors/ Josephson junction inductors artificial nonlinear transmission line with parametric modulation amplifying forward signals/ backward traveling signals converted to different frequency, preventing from reaching qubits... comparable with superconducting qubits, together with amplifier integrated on-chip"