Theory of the photonic Joule effect in superconducting circuits
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912396652576768 |
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| author | Cailleaux, Samuel Ficheux, Quentin Roch, Nicolas Basko, Denis M. |
| author_facet | Cailleaux, Samuel Ficheux, Quentin Roch, Nicolas Basko, Denis M. |
| contents | When a small system is coupled to a bath, it is generally assumed that the state of the bath remains unaffected by the system due to the bath's large number of degrees of freedom. Here we show theoretically that this assumption can be easily violated for photonic baths typically used in experiments involving superconducting circuits. We analyze the dynamics of a voltage-biased Josephson junction coupled to a photonic bath, represented as a long Josephson junction chain. Our findings show that the system can reach a non-equilibrium steady state where the photonic degrees of freedom become significantly overheated, leading to a qualitative change in the current-voltage $I-V$ curve. This phenomenon is analogous to the Joule effect observed in electrical conductors, where flowing current can substantially heat up electrons. Recognizing this effect is crucial for the many applications of high-impedance environments in quantum technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_19912 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Theory of the photonic Joule effect in superconducting circuits Cailleaux, Samuel Ficheux, Quentin Roch, Nicolas Basko, Denis M. Mesoscale and Nanoscale Physics Superconductivity Quantum Physics When a small system is coupled to a bath, it is generally assumed that the state of the bath remains unaffected by the system due to the bath's large number of degrees of freedom. Here we show theoretically that this assumption can be easily violated for photonic baths typically used in experiments involving superconducting circuits. We analyze the dynamics of a voltage-biased Josephson junction coupled to a photonic bath, represented as a long Josephson junction chain. Our findings show that the system can reach a non-equilibrium steady state where the photonic degrees of freedom become significantly overheated, leading to a qualitative change in the current-voltage $I-V$ curve. This phenomenon is analogous to the Joule effect observed in electrical conductors, where flowing current can substantially heat up electrons. Recognizing this effect is crucial for the many applications of high-impedance environments in quantum technologies. |
| title | Theory of the photonic Joule effect in superconducting circuits |
| topic | Mesoscale and Nanoscale Physics Superconductivity Quantum Physics |
| url | https://arxiv.org/abs/2411.19912 |