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Träfflista för sökning "WFRF:(Kudra Marina 1992) srt2:(2023)"

Sökning: WFRF:(Kudra Marina 1992) > (2023)

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1.
  • Fadavi Roudsari, Anita, 1978, et al. (författare)
  • Three-wave mixing traveling-wave parametric amplifier with periodic variation of the circuit parameters
  • 2023
  • Ingår i: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 122:5
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use superconducting nonlinear asymmetric inductive element (SNAIL) loops, biased with a dc magnetic flux. In addition, we equip the device with dispersion engineering features to create a stopband at the second harmonic of the pump and suppress the propagation of the higher harmonics that otherwise degrade the amplification. With a chain of 440 SNAILs, the amplifier provides up to 20 dB gain and a 3-dB bandwidth of 1 GHz. The added noise by the amplifier is found to be less than one photon.
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2.
  • Lu, Yong, 1989, et al. (författare)
  • Resolving Fock states near the Kerr-free point of a superconducting resonator
  • 2023
  • Ingår i: npj Quantum Information. - 2056-6387. ; 9:1
  • Tidskriftsartikel (refereegranskat)abstract
    • We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Nonlinear Asymmetric Inductive eLement). Such a device possesses a Kerr-free point in which the external magnetic flux allows to suppress the Kerr interaction. We have excited photons near this Kerr-free point and characterized the device using a transmon qubit. The excitation spectrum of the qubit allows to observe photon-number-dependent frequency shifts about nine times larger than the qubit linewidth. Our study demonstrates a compact integrated platform for continuous-variable quantum processing that combines large couplings, considerable relaxation times and excellent control over the photon mode structure in the microwave domain.
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