Multiplexed readout of four qubits in 3D circuit QED architecture using a broadband Josephson parametric amplifier

Kundu, Suman; Gheeraert, Nicolas; Hazra, Sumeru; Roy, Tanay; Salunkhe, Kishor; Patankar, Meghan P.; Vijay, R.

doi:10.1063/1.5089729

Cited by 23 publications

(10 citation statements)

References 26 publications

(31 reference statements)

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“…In the phase-insensitive mode, however, the effective available bandwidth for one or multiple tones is degraded. This stems from the need of preventing frequency collisions between the readout and idler bands [6], [37].…”

Section: Discussionmentioning

confidence: 99%

A Sub-GHz Impedance-Engineered Parametric Amplifier for the Readout of Sensors and Quantum Dots

Vesterinen

Simbierowicz

Jabdaraghi

et al. 2022

IEEE Trans. Appl. Supercond.

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In the work on superconducting parametric amplifiers, the frequency band below one gigahertz is calling for systematic improvements. Despite a prospect for ultralow added noise, bandwidth limitations have slowed down the integration of such amplifiers into sub-GHz experiments demanding fast (< 1 µs) readout speeds. Here, we study the impedance engineering of a flux-driven Josephson parametric amplifier (JPA) at 600 MHz. We propose, simulate and experimentally demonstrate a partially reconfigurable impedance transformer. The transformer enhances the JPA bandwidth to a state-ofthe-art value of 10 MHz at 20 dB gain. Our amplifier has immediate applications in the readout of cryogenic sensors and in the reflectometry of quantum dots for spin qubit quantum computing.

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Section: Discussionmentioning

confidence: 99%

A Sub-GHz Impedance-Engineered Parametric Amplifier for the Readout of Sensors and Quantum Dots

Vesterinen

Simbierowicz

Jabdaraghi

et al. 2022

IEEE Trans. Appl. Supercond.

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“…In addition, with further reduction of the mode spacing, the comb-like gain profile of JAMPA can become useful for frequency-division multiplexing (FDM) [24,[50][51][52] of multiple readout signals in a single amplifier. In this technique, to distribute the available bandwidth between multiple communication channels, it is optimal to arrange them at equally spaced frequencies, which makes it suitable for using the JAMPA.…”

Section: Discussionmentioning

confidence: 99%

Josephson Array-Mode Parametric Amplifier

et al. 2020

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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.

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“…This detuning thus protects the qubit from Purcell decay [97,98]. Dispersive readout has also been demonstrated to be fast and to have high fidelity [66], even when multiple qubits are readout simultaneously in multiplexed fashion [99][100][101]. Quantum non-demolition measurement also allows qubit initialization by heralding [102][103][104].…”

Section: Readoutmentioning

confidence: 99%