Real-time milli-Kelvin thermometry in a semiconductor qubit architecture
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866913397559263232 |
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| author | Champain, Victor Schmitt, Vivien Bertrand, Benoit Niebojewski, Heimanu Maurand, Romain Jehl, Xavier Winkelmann, Clemens De Franceschi, Silvano Brun, Boris |
| author_facet | Champain, Victor Schmitt, Vivien Bertrand, Benoit Niebojewski, Heimanu Maurand, Romain Jehl, Xavier Winkelmann, Clemens De Franceschi, Silvano Brun, Boris |
| contents | We report local time-resolved thermometry in a silicon nanowire quantum dot device designed to host a linear array of spin qubits. Using two alternative measurement schemes based on rf reflectometry, we are able to probe either local electron or phonon temperatures with $μ$s-scale time resolution and a noise equivalent temperature of $3$ $\rm mK/\sqrt{\rm Hz}$. Following the application of short microwave pulses, causing local periodic heating, time-dependent thermometry can track the dynamics of thermal excitation and relaxation, revealing clearly different characteristic time scales. This work opens important prospects to investigate the out-of-equilibrium thermal properties of semiconductor quantum electronic devices operating at very low temperature. In particular, it may provide a powerful handle to understand heating effects recently observed in semiconductor spin-qubit systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_12778 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Real-time milli-Kelvin thermometry in a semiconductor qubit architecture Champain, Victor Schmitt, Vivien Bertrand, Benoit Niebojewski, Heimanu Maurand, Romain Jehl, Xavier Winkelmann, Clemens De Franceschi, Silvano Brun, Boris Mesoscale and Nanoscale Physics We report local time-resolved thermometry in a silicon nanowire quantum dot device designed to host a linear array of spin qubits. Using two alternative measurement schemes based on rf reflectometry, we are able to probe either local electron or phonon temperatures with $μ$s-scale time resolution and a noise equivalent temperature of $3$ $\rm mK/\sqrt{\rm Hz}$. Following the application of short microwave pulses, causing local periodic heating, time-dependent thermometry can track the dynamics of thermal excitation and relaxation, revealing clearly different characteristic time scales. This work opens important prospects to investigate the out-of-equilibrium thermal properties of semiconductor quantum electronic devices operating at very low temperature. In particular, it may provide a powerful handle to understand heating effects recently observed in semiconductor spin-qubit systems. |
| title | Real-time milli-Kelvin thermometry in a semiconductor qubit architecture |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2308.12778 |