تقرير
Quench Spectroscopy of a Disordered Quantum System
| العنوان: | Quench Spectroscopy of a Disordered Quantum System |
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| المؤلفون: | Villa, L., Thomson, S. J., Sanchez-Palencia, L. |
| المصدر: | Phys. Rev. A 104, 021301 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Quantum Gases |
| الوصف: | The characterization of excitations in disordered quantum systems is a central issue in connection with glass physics and many-body localization. Here, we show that quench spectroscopy of a disordered model, as realized from its out-of-equilibrium dynamics following a global quench, allows us to fully characterize the spectral properties of the disordered phases. In the Bose-Hubbard model, a clear signature of gapless excitations in momentum-resolved spectroscopy enables us to accurately locate the Mott insulator to Bose glass transition, while the presence or absence of a well-defined soundlike mode distinguishes the superfluid from the Bose glass phase. Moreover, spatially-resolved spectroscopy provides local spectral properties and allows us to extract the typical spacing of gapless regions, giving a second independent way to uniquely identify all three phases. Our findings have far-ranging implications for a variety of experimental platforms, and offer a powerful and versatile probe of the low-energy phases of disordered systems. Comment: 6 pages, 4 figures + Supplemental Material |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevA.104.L021301 |
| URL الوصول: | http://arxiv.org/abs/2105.05774 |
| رقم الأكسشن: | edsarx.2105.05774 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevA.104.L021301 |
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