Microwave Photon Detection at Parametric Criticality

Kirill Petrovnin*, Jiaming Wang, Mikhail Perelshtein, Pertti J. Hakonen, Gheorghe-Sorin Paraoanu

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
6 Downloads (Pure)


The detection of microwave fields at single-photon power levels is a much-sought-after technology, with practical applications in nanoelectronics and quantum information science. Here we demonstrate a simple yet powerful criticality-enhanced method of microwave photon detection by operating a magnetic-field-tunable Kerr Josephson parametric amplifier at the border of a first-order phase transition and close to the critical point. We obtain an efficiency of 73% and a dark-count rate of 167 kHz, corresponding to a responsivity of 1.3×1017W−1 and noise-equivalent power of 3.28 zW/⁢√Hz. We verify the single-photon operation by extracting the Poissonian statistics of a coherent probe signal.
Original languageEnglish
Article number020342
JournalPRX Quantum
Issue number2
Publication statusPublished - Apr 2024
MoE publication typeA1 Journal article-refereed


Dive into the research topics of 'Microwave Photon Detection at Parametric Criticality'. Together they form a unique fingerprint.

Cite this