Niobium Tunable Microwave Filter

Rafique, Raihan; Ohki, Thomas A.; Linnér, Peter; Herr, Anna

doi:10.1109/tmtt.2009.2017347

Cited by 9 publications

(4 citation statements)

References 17 publications

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“…The MUX/DEMUX elements will be required to streamline the wiring between the quantum array and the coprocessor over low-thermal conductance, high-bandwidth microstrip lines, as described below. In previous work, the signal distribution challenge has been explored in the context of SFQ-controllable microwave switches and filters [97,98]. For the schemes we propose here, the control bit patterns are dense and data-rich compared to the dilute results of syndrome measurement.…”

Section: Vision and Challengesmentioning

confidence: 99%

Quantum–classical interface based on single flux quantum digital logic

McDermott

Vavilov

Plourde

et al. 2018

Quantum Sci. Technol.

138

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We describe an approach to the integrated control and measurement of a large-scale superconducting multiqubit circuit using a proximal coprocessor based on the Single Flux Quantum (SFQ) digital logic family. Coherent control is realized by irradiating the qubits directly with classical bitstreams derived from optimal control theory. Qubit measurement is performed by a Josephson photon counter, which provides access to the classical result of projective quantum measurement at the millikelvin stage. We analyze the power budget and physical footprint of the SFQ coprocessor and discuss challenges and opportunities associated with this approach.

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Section: Vision and Challengesmentioning

confidence: 99%

Quantum–classical interface based on single flux quantum digital logic

McDermott

Vavilov

Plourde

et al. 2018

Quantum Sci. Technol.

138

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“…SME circuits can manage digital signals with clock speeds of up to 40 GHz. SME technology offers limited choices for realizing reconfigurable analog frontends, such as constructing a tunable inductor using a string of Josephson junctions (JJs) or superconducting quantum interference devices (SQUIDs) [1]. The primary problem with this approach is the intrinsic nonlinearity of JJs and limited power-handling capability.…”

Section: Motivationsmentioning

confidence: 99%

Low Temperature Superconducting RF MEMS Devices

Attar

Mansour

2013

IEEE Trans. Appl. Supercond.

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“…Relying on the same idea, a group of lumped or quasilumped LTS filters are designed and associated with RSFQ circuitry for qubit controls in [16][17][18][19]. More efforts, dealing with the implementation techniques of LTS filters, are reported in [20] and [21].…”

Section: Introductionmentioning

confidence: 99%

Sharp-selectivity in-line topology low temperature superconducting bandpass filter for superconducting quantum applications

Michibayashi

Takeuchi

et al. 2020

Supercond. Sci. Technol.

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This paper presents a new class of sharp-selectivity low-temperature superconducting filter that incorporates lumped element resonant couplings. Dependent on a novel synthesis approach, the proposed filter exhibits great advantages such as: (1) a very simple in-line topology (without any cross coupling), (2) extremely compact size based on lumped inductor-capacitor (LC) elements, and (3) multiple transmission zeros (TZs) independently generated and controlled (via each resonant coupling). To facilitate the physical implementation, a group of lumped element circuit models are detailed, where series LC units are adopted for both the resonators and the resonant couplings. Considering an in-line topology here, the entire filter layout is then designed by cascading the lumped models one after another. For verification, a 5th-order bandpass filter centered at 5 GHz, with 500 MHz bandwidth and 3 TZs, is designed, simulated, and tested at cryogenic temperature (4.2 K). Moreover, preliminary simulations of the presented filter in series with an on-chip rapid single-flux-quantum microwave pulse generator are discussed for superconducting quantum applications.

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Niobium Tunable Microwave Filter

Cited by 9 publications

References 17 publications

Quantum–classical interface based on single flux quantum digital logic

Quantum–classical interface based on single flux quantum digital logic

Low Temperature Superconducting RF MEMS Devices

Sharp-selectivity in-line topology low temperature superconducting bandpass filter for superconducting quantum applications

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