[9p-N106-1~9] FS.1 Focused Session "AI Electronics"

1:30 PM - 2:00 PM JST(4:30 AM - 5:00 AM UTC)

[9p-N106-1] [Invited Talk] Near-quantum-limited microwave amplification using a diamond maser

Morihiro Ohta¹, Ching-Ping Lee¹, Ivan Kostylev¹, Hiroki Takahashi¹, 〇Yuimaru Kubo¹ (1.OIST)

Keywords:

quantum technology,maser,superconducting quantum circuits

Microwave quantum technologies require the amplification of weak signals with minimal added noise at millikelvin temperatures. This stringent requirement has traditionally been met by superconducting parametric amplifiers. Here, we demonstrate the first non-superconducting microwave amplifier with near-quantum-limited noise performance, based on a maser employing substitutional nitrogen defects (P1 centers) in a diamond crystal. Our diamond maser amplifier delivers more than 30 dB of gain at 6.595 GHz, with a minimum noise temperature of 0.86 K—corresponding to 2.2 added noise photons—comparable to state-of-the-art superconducting parametric amplifiers.