تقرير
Positronium density measurements using polaritonic effects
| العنوان: | Positronium density measurements using polaritonic effects |
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| المؤلفون: | Cortese, Erika, Cassidy, David B., De Liberato, Simone |
| المصدر: | Phys. Rev. A 107, 023306 (2023) |
| سنة النشر: | 2022 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Physics - Atomic Physics, Physics - Optics, Quantum Physics |
| الوصف: | Recent experimental advances in Positronium (Ps) physics have made it possible to produce dense Ps ensembles in which Ps-Ps interactions may occur, leading to the production of Ps$_2$ molecules and paving the way to the realization of a Ps Bose-Einstein Condensate (BEC). In order to achieve this latter goal it would be advantageous to develop new methods to measure Ps densities in real-time. Here we describe a possible approach to do this using polaritonic methods: using realistic experimental parameters we demonstrate that a dense Ps gas can be strongly coupled to the photonic field of a distributed Bragg reflector microcavity. In this strongly coupled regime, the optical spectrum of the system is composed of two hybrid positronium-polariton resonances separated by the vacuum Rabi splitting, which is proportional to the square root of the Ps density. Given that polaritons can be created on a sub-cycle timescale, a spectroscopic measurement of the vacuum Rabi splitting could be used as an ultra-fast Ps density measurement in regimes relevant to Ps BEC formation. Moreover, we show how positronium-polaritons could potentially enter the ultrastrong light-matter coupling regime, introducing a radically novel platform to explore its non-perturbative phenomenology. Comment: 8 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevA.107.023306 |
| URL الوصول: | http://arxiv.org/abs/2210.09875 |
| رقم الأكسشن: | edsarx.2210.09875 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevA.107.023306 |
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