Qubit ZooDemonstrates a dc-powered inelastic-Cooper-pair-tunneling amplifier that avoids the microwave pump infrastructure used by conventional parametric amplifiers while retaining broadband near-quantum-limited performance.
Key Results
- Within 0.2 photons of the quantum limit
- 13 dB average gain across 3.5 GHz
- Reflection amplifier driven by a dc-biased SQUID
Links
- Journal: Physical Review Applied
- arXiv: 2512.19902