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SUMMARY:Distributed-Coupling Resonant Phase Matching in NbTiN Kinetic Trav
 eling-Wave Parametric Amplifier
DTSTART:20260922T080000Z
DTEND:20260922T090000Z
DTSTAMP:20261005T100400Z
UID:indico-event-1431@indico.ibs.re.kr
DESCRIPTION:Speakers: SeongJae Bae (RIKEN Center for Quantum Computing (RQ
 C)\, Japan)\n\nQuantum-limited microwave amplifiers are essential for the 
 readout of weak signals in a wide range of experiments\, including quantum
  computing\, astronomy\, and high-energy experiments such as dark matter a
 xion searches. As these fields continue to grow\, there is an increasing n
 eed for amplifiers that can provide low noise\, wide bandwidth with reduce
 d complexity. In recent studies of superconducting circuits\, several appr
 oaches have been explored to meet these requirements. Traveling-wave param
 etric amplifiers have recently emerged as promising candidates for scalabl
 e multiplexed readout because they can overcome the bandwidth and dynamic-
 range limitations of existing resonator-based quantum-limited amplifiers. 
 In particular\, Kinetic Traveling-Wave Parametric Amplifiers (KTWPAs) are 
 especially attractive due to their simple fabrication\, high power handlin
 g\, and broadband quantum-limited noise operation. A key challenge in thes
 e devices is the realization of efficient and robust phase matching. Recen
 t approaches have employed resonant elements periodically in every few uni
 t cells\, achieving broadband high- gain performance through its unique di
 spersion relation. However\, these designs also present fabrication challe
 nges in the implementation of homogeneous lumped resonators. To address th
 ese challenges and achieve more efficient phase matching\, we previously p
 roposed a distributed-coupling resonant phase-matching (dcRPM) scheme\, in
  which a single waveguide resonator is coupled to multiple unit cells\, en
 abling phase correction at every nodes. After its initial demonstration in
  a Josephson traveling-wave parametric amplifier\, we extended it to the K
 TWPAs platform. By combining the phase-matching capability of dcRPM with t
 he intrinsic advantages of KTPWAs operation\, we expect that this approach
  will provide a promising route toward broadband high-gain\, quantum limit
 ed noise performance.\n\nhttps://indico.ibs.re.kr/event/1431/
LOCATION:C101 (Changjo-gwan\, KAIST (Munji Campus))
URL:https://indico.ibs.re.kr/event/1431/
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