A general characterization method for nonlinearities in superconducting circuits

Weißl, Thomas; Jolin, Shan W.; Borgani, Riccardo; Forchheimer, Daniel; Haviland, David B.

doi:10.1088/1367-2630/ab175a

Cited by 2 publications

(1 citation statement)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The vertical lines of different color visible in the two-tone spectroscopy data likely result from the phase slips in the array when crossing the flux Φ = ±Φ 0 /2, where Φ 0 = h/2e is the superconducting magnetic flux quantum. In addition to the resonant mode frequencies of devices A-C, we measure self-Kerr nonlinearities using IMD spectroscopy [28,29,42]. The results are summarized in Table I and are shown for reference in Fig.…”

Section: Array Mode Frequencies and Kerr Nonlinearities: Experimentsmentioning

confidence: 99%

Josephson Array-Mode Parametric Amplifier

et al. 2020

View full text Add to dashboard Cite

We introduce a novel near-quantum-limited amplifier with a large tunable bandwidth and high dynamic range -the Josephson Array Mode Parametric Amplifier (JAMPA). The signal and idler modes involved in the amplification process are realized by the array modes of a chain of 1000 flux tunable, Josephson-junction-based, nonlinear elements. The frequency spacing between array modes is comparable to the flux tunability of the modes, ensuring that any desired frequency can be occupied by a resonant mode, which can further be pumped to produce high gain. We experimentally demonstrate that the device can be operated as a nearly quantum-limited parametric amplifier with 20 dB of gain at almost any frequency within (4−12) GHz band. On average, it has a 3 dB bandwidth of 11 MHz and input 1 dB compression power of −108 dBm, which can go as high as −93 dBm. We envision the application of such a device to the time-and frequency-multiplexed readout of multiple qubits, as well as to the generation of continuous-variable cluster states.

show abstract

Section: Array Mode Frequencies and Kerr Nonlinearities: Experimentsmentioning

confidence: 99%

Josephson Array-Mode Parametric Amplifier

et al. 2020

View full text Add to dashboard Cite

show abstract

Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar-waveguide resonators

Biznárová,

Rivera Hernández,

Forchheimer

et al. 2024

Phys. Rev. Applied

View full text Add to dashboard Cite

Two-level system (TLS) loss typically limits the coherence of superconducting quantum circuits. The loss induced by TLS defects is nonlinear, resulting in quality factors with a strong dependence on the circulating microwave power. We observe frequency mixing due to this nonlinearity by applying a two-tone drive to a coplanar waveguide resonator and measuring the intermodulation products using a multifrequency lock-in technique. This intermodulation spectroscopy method provides an efficient approach to characterizing TLS loss in superconducting circuits. Using harmonic balance reconstruction, we recover the nonlinear parameters of the device-TLS interaction, which are in good agreement with the standard tunneling model for TLSs. Published by the American Physical Society 2024

show abstract

A general characterization method for nonlinearities in superconducting circuits

Cited by 2 publications

References 39 publications

Josephson Array-Mode Parametric Amplifier

Josephson Array-Mode Parametric Amplifier

Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar-waveguide resonators

Contact Info

Product

Resources

About