séminaire conjoint LSI+CPHT+PMC = M4S

Séminaire conjoint LSI+CPHT+PMC = M4S

Jeudi 18 décembre à 11h00

Nouvelle salle de séminaire PMC (05-10-26A)

Yuimaro Kubo
(Principal Research Scientist à l'Okinawa Institute of Science and Technology au Japon)

Title: A near-quantum-limited diamond maser amplifier

Abstract: Microwave quantum technologies require amplification of weak signals with minimal added noise at millikelvin temperatures. This stringent demand has traditionally been met by superconducting parametric amplifiers. We demonstrate the first-ever non-superconducting microwave amplifier with near-quantum-limited noise performance, based on a maser operating at millikelvin temperatures. The active medium comprises substitutional nitrogen defects (P1 centers) in a diamond crystal, placed within a microwave resonator. Our device delivers over 30 dB of gain at 6.595 GHz, and the minimum noise temperature of about 1 K, corresponds to an added noise of 3 quanta. The amplifier features 20 to 30 dB higher compression points than the state-of-the-art superconducting devices.