Noise-induced stabilization of dynamical states with broken time-reversal symmetry
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2022
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| Soggetti: | |
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| _version_ | 1866911984822255616 |
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| author | Larson, Trevyn F. Q. Zhao, Lingfei Arnault, Ethan G. Wei, Ming-Tso Seredinski, Andrew Li, Hengming Watanabe, Kenji Tanaguchi, Takashi Amet, François Finkelstein, Gleb |
| author_facet | Larson, Trevyn F. Q. Zhao, Lingfei Arnault, Ethan G. Wei, Ming-Tso Seredinski, Andrew Li, Hengming Watanabe, Kenji Tanaguchi, Takashi Amet, François Finkelstein, Gleb |
| contents | Under a high frequency drive, Josephson junctions demonstrate "Shapiro steps" of quantized voltage. These are dynamically stabilized states, in which the phase across the junction locks to the external drive. We explore the stochastic switching between two symmetric steps at $\frac{\hbarω}{2e}$ and $-\frac{\hbarω}{2e}$. Surprisingly, the switching rate exhibits a pronounced non-monotonicity as a function of temperature, violating the general expectation that transitions should become faster with temperature. We explain this behavior by realizing that the system retains memory of the dynamic state from which it is switching, thereby breaking the conventional simplifying assumptions about separations of time scales. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2212_13952 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Noise-induced stabilization of dynamical states with broken time-reversal symmetry Larson, Trevyn F. Q. Zhao, Lingfei Arnault, Ethan G. Wei, Ming-Tso Seredinski, Andrew Li, Hengming Watanabe, Kenji Tanaguchi, Takashi Amet, François Finkelstein, Gleb Mesoscale and Nanoscale Physics Under a high frequency drive, Josephson junctions demonstrate "Shapiro steps" of quantized voltage. These are dynamically stabilized states, in which the phase across the junction locks to the external drive. We explore the stochastic switching between two symmetric steps at $\frac{\hbarω}{2e}$ and $-\frac{\hbarω}{2e}$. Surprisingly, the switching rate exhibits a pronounced non-monotonicity as a function of temperature, violating the general expectation that transitions should become faster with temperature. We explain this behavior by realizing that the system retains memory of the dynamic state from which it is switching, thereby breaking the conventional simplifying assumptions about separations of time scales. |
| title | Noise-induced stabilization of dynamical states with broken time-reversal symmetry |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2212.13952 |