تقرير
Long-range Ising interactions mediated by $\lambda\phi^4$ fields: probing the renormalisation of sound in crystals of trapped ions
| العنوان: | Long-range Ising interactions mediated by $\lambda\phi^4$ fields: probing the renormalisation of sound in crystals of trapped ions |
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| المؤلفون: | Martín-Vázquez, G., Aarts, G., Müller, M., Bermudez, A. |
| المصدر: | PRX Quantum 3, 020352, 2022 |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter High Energy Physics - Lattice Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Quantum Gases, High Energy Physics - Lattice |
| الوصف: | The generating functional of a self-interacting scalar quantum field theory (QFT), which contains all the relevant information about real-time dynamics and scattering experiments, can be mapped onto a collection of multipartite-entangled two-level sensors via an interferometric protocol that exploits a specific set of source functions. Although one typically focuses on impulsive delta-like sources, as these give direct access to $n$-point Feynman propagators, we show in this work that using always-on harmonic sources can simplify substantially the sensing protocol. In a specific regime, the effective real-time dynamics of the quantum sensors can be described by a quantum Ising model with long-range couplings, the range and strength of which contains all the relevant information about the renormalisation of the QFT, which can now be extracted in the absence of multi-partite entanglement. We present a detailed analysis of how this sensing protocol can be relevant to characterise the long-wavelength QFT that describes quantised sound waves of trapped-ion crystals in the vicinity of a structural phase transition, opening a new route to characterise the associated renormalisation of sound. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PRXQuantum.3.020352 |
| URL الوصول: | http://arxiv.org/abs/2105.06886 |
| رقم الأكسشن: | edsarx.2105.06886 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PRXQuantum.3.020352 |
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