Quantum read-out for cold atomic quantum simulators
| العنوان: | Quantum read-out for cold atomic quantum simulators |
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| المؤلفون: | Thomas Schweigler, Jörg Schmiedmayer, Bernhard Rauer, Jens Eisert, Marek Gluza, Christian Krumnow |
| المصدر: | Communications Physics Communications Physics, Vol 3, Iss 1, Pp 1-8 (2020) |
| بيانات النشر: | Springer Science and Business Media LLC, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Work (thermodynamics), Phonon, Quantum dynamics, Measure (physics), FOS: Physical sciences, General Physics and Astronomy, Quantum simulator, lcsh:Astrophysics, 01 natural sciences, 010305 fluids & plasmas, Superfluidity, quantum information, lcsh:QB460-466, 0103 physical sciences, Statistical physics, 010306 general physics, Quantum, quantum simulation, Condensed Matter::Quantum Gases, Physics, Quantum Physics, 500 Naturwissenschaften und Mathematik::530 Physik::530 Physik, Observable, critical phenomena, lcsh:QC1-999, phase transitions, Quantum Gases (cond-mat.quant-gas), Quantum Physics (quant-ph), Condensed Matter - Quantum Gases, lcsh:Physics |
| الوصف: | Quantum simulators allow to explore static and dynamical properties of otherwise intractable quantum many-body systems. In many instances, however, it is the read-out that limits such quantum simulations. In this work, we introduce a new paradigm of experimental read-out exploiting coherent non-interacting dynamics in order to extract otherwise inaccessible observables. Specifically, we present a novel tomographic recovery method allowing to indirectly measure second moments of relative density fluctuations in one-dimensional superfluids which until now eluded direct measurements. We achieve this by relating second moments of relative phase fluctuations which are measured at different evolution times through known dynamical equations arising from unitary non-interacting multi-mode dynamics. Applying methods from signal processing we reconstruct the full matrix of second moments, including the relative density fluctuations. We employ the method to investigate equilibrium states, the dynamics of phonon occupation numbers and even to predict recurrences. The method opens a new window for quantum simulations with one-dimensional superfluids, enabling a deeper analysis of their equilibration and thermalization dynamics. 7+13 pages, 15 figures, substantially extended and revised, material added |
| تدمد: | 2399-3650 |
| DOI: | 10.1038/s42005-019-0273-y |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9312da3dbb7588e78a5dfe990f596cd7 https://doi.org/10.1038/s42005-019-0273-y |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....9312da3dbb7588e78a5dfe990f596cd7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 23993650 |
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| DOI: | 10.1038/s42005-019-0273-y |