Characterization of a multimode coplanar waveguide parametric amplifier

Simoen, Michael Roger Andre; Chang, Christophe; Krantz, Philip; Bylander, Jonas; Wustmann, Waltraut; Shumeiko, Vitaly; Delsing, Per; Wilson, Christopher

doi:10.1063/1.4933265

Cited by 43 publications

(41 citation statements)

References 46 publications

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“…The layout of the device is similar to that in Ref. [22]. The distance between the interdigitated coupling capacitor and the SQUID is 31 mm, yielding a fundamental resonant frequency ω 1 /2π = 912 MHz.…”

Section: Experimental Methodsmentioning

confidence: 85%

“…For instance, the presence of an idler in parametric amplification below the parametric instability threshold defines the structure of a squeezed vacuum and twomode entanglement of the output photons [4][5][6]. This is true for both degenerate and nondegenerate parametric resonances, with the only difference being that for the nondegenerate case, the idler has a frequency far detuned from the signal frequency and appears within the bandwidth of the conjugated mode [22], while for the degenerate case, the idler appears within the bandwidth of the signal mode.…”

Section: B Response To An External Signalmentioning

confidence: 99%

“…* andreas.bengtsson@chalmers.se Some properties of the nondegenerate parametric resonance in the subthreshold region, amplification [6,22] and frequency conversion [23,24], have been experimentally investigated.…”

Section: Introductionmentioning

confidence: 99%

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Nondegenerate parametric oscillations in a tunable superconducting resonator

et al. 2018

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We investigate nondegenerate parametric oscillations in a superconducting microwave multimode resonator that is terminated by a superconducting quantum interference device (SQUID). The parametric effect is achieved by modulating magnetic flux through the SQUID at a frequency close to the sum of two resonator-mode frequencies. For modulation amplitudes exceeding an instability threshold, self-sustained oscillations are observed in both modes. The amplitudes of these oscillations show good quantitative agreement with a theoretical model. The oscillation phases are found to be correlated and exhibit strong fluctuations which broaden the oscillation spectral linewidths. These linewidths are significantly reduced by applying a weak on-resonant tone, which also suppresses the phase fluctuations. When the weak tone is detuned, we observe synchronization of the oscillation frequency with the frequency of the input. For the detuned input, we also observe an emergence of three idlers in the output. This observation is in agreement with theory indicating four-mode amplification and squeezing of a coherent input.

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Section: Experimental Methodsmentioning

confidence: 85%

Section: B Response To An External Signalmentioning

confidence: 99%

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Nondegenerate parametric oscillations in a tunable superconducting resonator

et al. 2018

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“…For this purpose, one can either use broadband traveling wave parametric amplifiers [1,2] or band tunable narrow-band JPAs [3][4][5][6]. The latter are nowadays routinely used to provide amplification with a noise performance close to the standard quantum limit [7][8][9][10][11][12]. Moreover, if operated in the phase sensitive regime, JPAs can even achieve noise temperatures below the standard quantum limit [11,13,14].…”

Section: Introductionmentioning

confidence: 99%

Hysteretic Flux Response and Nondegenerate Gain of Flux-Driven Josephson Parametric Amplifiers

et al. 2017

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Josephson parametric amplifiers (JPA) have become key devices in quantum science and technology with superconducting circuits. In particular, they can be utilized as quantum-limited amplifiers or as a source of squeezed microwave fields. Here, we report on the detailed measurements of five flux-driven JPAs, three of them exhibiting a hysteretic dependence of the resonant frequency versus the applied magnetic flux. We model the measured characteristics by numerical simulations based on the two-dimensional potential landscape of the dc superconducting quantum interference devices (dc-SQUID), which provide the JPA nonlinearity, for a finite screening parameter βL > 0 and demonstrate excellent agreement between the numerical results and the experimental data. Furthermore, we study the nondegenerate response of different JPAs and accurately describe the experimental results with our theory.

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“…Tuning the resonance frequency is a pre-requisite for the dynamic coupling of quantum bits (qubits), 12 controllable storage and release of microwave photons, 13 photon generation via the dynamical Casimir effect, 14 and parametric amplification. 15,16 In all the above examples, the frequency tuning was achieved in CPW resonators by inserting a superconducting quantum interference device (SQUID) into the resonator as a control element. Such a scheme allows for fast ($1 ns) and wide range ($700 MHz) tuning but at the expense of introducing an extra dissipation channel associated with the SQUID.…”

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confidence: 99%

Tunable superconducting microstrip resonators

Adamyan

Kubatkin

Danilov

2016

Applied Physics Letters

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We report on a simple yet versatile design for a tunable superconducting microstrip resonator. Niobium nitride is employed as the superconducting material and aluminum oxide, produced by atomic layer deposition, as the dielectric layer. We show that the high quality of the dielectric material allows to reach the internal quality factors in the order of Q i $ 10 4 in the single photon regime. Q i rapidly increases with the number of photons in the resonator N and exceeds 10 5 for N $ 10 À 50. A straightforward modification of the basic microstrip design allows to pass a current bias through the strip and to control its kinetic inductance. We achieve a frequency tuning df ¼ 62 MHz around f 0 ¼ 2:4 GHz for a fundamental mode and df ¼ 164 MHz for a third harmonic. This translates into a tuning parameter Q i df =f 0 ¼ 150. The presented design can be incorporated into essentially any superconducting circuitry operating at temperatures below 2.5 K.

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Characterization of a multimode coplanar waveguide parametric amplifier

Cited by 43 publications

References 46 publications

Nondegenerate parametric oscillations in a tunable superconducting resonator

Nondegenerate parametric oscillations in a tunable superconducting resonator

Hysteretic Flux Response and Nondegenerate Gain of Flux-Driven Josephson Parametric Amplifiers

Tunable superconducting microstrip resonators

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