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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2411.12782 |
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| _version_ | 1866909533334405120 |
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| author | Singh, Priyank Gunyhó, András Suominen, Heikki Catto, Giacomo Blanchet, Florian Chen, Qi-Ming Alizadeh, Arman Keränen, Aarne Ma, Jian Mörstedt, Timm Liu, Wei Möttonen, Mikko |
| author_facet | Singh, Priyank Gunyhó, András Suominen, Heikki Catto, Giacomo Blanchet, Florian Chen, Qi-Ming Alizadeh, Arman Keränen, Aarne Ma, Jian Mörstedt, Timm Liu, Wei Möttonen, Mikko |
| contents | Recently, ultrasensitive calorimeters have been proposed as a resource-efficient solution for multiplexed qubit readout in superconducting large-scale quantum processors. However, experiments demonstrating frequency multiplexing of these superconductor--normal--conductor--superconductor (SNS) sensors are are lacking in the literature. To this end, we present the design, fabrication, and operation of three SNS sensors with frequency-multiplexed input and probe circuits, all on a single chip. These devices have their probe frequencies in the range 150 MHz--200 MHz, which is well detuned from the heater frequencies of 4.4 GHz--7.6 GHz compatible with typical readout frequencies of superconducting qubits. Importantly, we show on-demand triggering of both individual and multiple low-noise SNS bolometers with very low cross talk. These experiments pave the way for multiplexed bolometric characterization and calorimetric readout of multiple qubits, a promising step in minimizing related resources such as the number of readout lines and microwave isolators in large-scale superconducting quantum computers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_12782 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multiplexed readout of Superconductor--Normal-Conductor--Superconductor bolometers Singh, Priyank Gunyhó, András Suominen, Heikki Catto, Giacomo Blanchet, Florian Chen, Qi-Ming Alizadeh, Arman Keränen, Aarne Ma, Jian Mörstedt, Timm Liu, Wei Möttonen, Mikko Quantum Physics Mesoscale and Nanoscale Physics Recently, ultrasensitive calorimeters have been proposed as a resource-efficient solution for multiplexed qubit readout in superconducting large-scale quantum processors. However, experiments demonstrating frequency multiplexing of these superconductor--normal--conductor--superconductor (SNS) sensors are are lacking in the literature. To this end, we present the design, fabrication, and operation of three SNS sensors with frequency-multiplexed input and probe circuits, all on a single chip. These devices have their probe frequencies in the range 150 MHz--200 MHz, which is well detuned from the heater frequencies of 4.4 GHz--7.6 GHz compatible with typical readout frequencies of superconducting qubits. Importantly, we show on-demand triggering of both individual and multiple low-noise SNS bolometers with very low cross talk. These experiments pave the way for multiplexed bolometric characterization and calorimetric readout of multiple qubits, a promising step in minimizing related resources such as the number of readout lines and microwave isolators in large-scale superconducting quantum computers. |
| title | Multiplexed readout of Superconductor--Normal-Conductor--Superconductor bolometers |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2411.12782 |