SwePub
Sök i SwePub databas

  Extended search

Träfflista för sökning "id:"swepub:oai:research.chalmers.se:99b0127e-c63d-460b-919b-f89ef8c83136" "

Search: id:"swepub:oai:research.chalmers.se:99b0127e-c63d-460b-919b-f89ef8c83136"

  • Result 1-1 of 1
Sort/group result
   
EnumerationReferenceCoverFind
1.
  • Lu, Yong, 1989, et al. (author)
  • Quantum efficiency, purity and stability of a tunable, narrowband microwave single-photon source
  • 2021
  • In: npj Quantum Information. - : Springer Science and Business Media LLC. - 2056-6387. ; 7:1
  • Journal article (peer-reviewed)abstract
    • We demonstrate an on-demand source of microwave single photons with 71–99% intrinsic quantum efficiency. The source is narrowband (300 kHz) and tuneable over a 600 MHz range around 5.2 GHz. Such a device is an important element in numerous quantum technologies and applications. The device consists of a superconducting transmon qubit coupled to the open end of a transmission line. A π-pulse excites the qubit, which subsequently rapidly emits a single photon into the transmission line. A cancellation pulse then suppresses the reflected π-pulse by 33.5 dB, resulting in 0.005 photons leaking into the photon emission channel. We verify strong antibunching of the emitted photon field and determine its Wigner function. Non-radiative decay and 1/f flux noise both affect the quantum efficiency. We also study the device stability over time and identify uncorrelated discrete jumps of the pure dephasing rate at different qubit frequencies on a time scale of hours, which we attribute to independent two-level system defects in the device dielectrics, dispersively coupled to the qubit. Our single-photon source with only one input port is more compact and scalable compared to standard implementations.
  •  
Skapa referenser, mejla, bekava och länka
  • Result 1-1 of 1

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view