Near-Quantum-Limited Readout for the Princeton Axion Search using a sub-GHz Kinetic Inductance Traveling Wave Parametric Amplifier

@misc{wiedemann2026nearquantumlimited,
  title = {{Near-Quantum-Limited Readout for the Princeton Axion Search using a sub-GHz Kinetic Inductance Traveling Wave Parametric Amplifier}},
  author = {Joe Wiedemann and Roman Kolevatov and Jianyang Fu and Joelle-Marie Begin and Nate Otto and Felix St-Amour and Lyman Page and Henry LeDuc and Peter Day and Saptarshi Chaudhuri},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.06761},
  eprint = {2611.06761},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.06761},
}

TY  - UNPB
TI  - Near-Quantum-Limited Readout for the Princeton Axion Search using a sub-GHz Kinetic Inductance Traveling Wave Parametric Amplifier
AU  - Joe Wiedemann
AU  - Roman Kolevatov
AU  - Jianyang Fu
AU  - Joelle-Marie Begin
AU  - Nate Otto
AU  - Felix St-Amour
AU  - Lyman Page
AU  - Henry LeDuc
AU  - Peter Day
AU  - Saptarshi Chaudhuri
PY  - 2026
DA  - 2026/11/04
PB  - arXiv
DO  - 10.48550/arxiv.2611.06761
UR  - https://arxiv.org/abs/2611.06761
AB  - Parametric amplifiers are a workhorse for near-quantum-limited measurements above 1 GHz. However, amplifier development has been more limited below 1 GHz. We present a kinetic inductance traveling-wave parametric amplifier (KI-TWPA) operating over 300-700 MHz, with gain exceeding 30 dB and pump powers of a few hundred nanowatts. The system noise performance, as measured by a variable-temperature noise source, is 2.5-3.5 quanta. This device is a versatile new tool for precision measurements of sub-GHz signals, with applications including readout of semiconductor spin qubits, superconducting detector arrays, and searches for new physics beyond the Standard Model. We characterize aspects of the amplifier performance relevant to axion searches, including gain drift, compression point, amplifier noise at various operating temperatures, readout with an input circulator, and magnetic field insensitivity.
ER  -