تقرير
Strongly correlated superfluid order parameters from dc Josephson supercurrents
العنوان: | Strongly correlated superfluid order parameters from dc Josephson supercurrents |
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المؤلفون: | Kwon, W. J., Del Pace, G., Panza, R., Inguscio, M., Zwerger, W., Zaccanti, M., Scazza, F., Roati, G. |
المصدر: | Science 369, 84-88 (2020) |
سنة النشر: | 2019 |
المجموعة: | Condensed Matter Physics (Other) |
مصطلحات موضوعية: | Condensed Matter - Quantum Gases, Condensed Matter - Superconductivity, Physics - Atomic Physics |
الوصف: | The dc Josephson effect provides a powerful phase-sensitive tool for investigating superfluid order parameters. We report on the observation of dc Josephson supercurrents in strongly interacting fermionic superfluids across a tunnelling barrier in the absence of any applied potential difference. For sufficiently strong barriers, we observe a sinusoidal current-phase relation, in agreement with Josephson's seminal prediction. We map out the zero-resistance state and its breakdown as a function of junction parameters, extracting the Josephson critical current behaviour. By comparing our results with an analytic model, we determine the pair condensate fraction throughout the Bardeen-Cooper-Schrieffer - Bose-Einstein Condensation crossover. Our work suggests that coherent Josephson transport may be used to pin down superfluid order parameters in diverse atomic systems, even in the presence of strong correlations. |
نوع الوثيقة: | Working Paper |
DOI: | 10.1126/science.aaz2463 |
URL الوصول: | http://arxiv.org/abs/1908.09696 |
رقم الأكسشن: | edsarx.1908.09696 |
قاعدة البيانات: | arXiv |
DOI: | 10.1126/science.aaz2463 |
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