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EnglishFluctuations of the atomic positions are at the core of a large class of unusual material properties ranging from quantum para-electricity to high temperature superconductivity. Their measurement in solids is the subject of an intense scientific debate focused on seeking a methodology capable of establishing a direct link between the variance of the atomic displacements and experimentally measurable observables. Here we address this issue by means of non-equilibrium optical experiments performed in shot-noise limited regime. The variance of the time dependent atomic positions and momenta is directly mapped into the quantum fluctuations of the photon number of the scattered probing light. A fully quantum description of the non-linear interaction between photonic and phononic fields is benchmarked by unveiling the squeezing of thermal phonons in $alpha$-quartz.
| Titolo: | Photon number statistics uncover the fluctuations in non-equilibrium lattice dynamics | |
| Autori: | FAUSTI, DANIELE (Corresponding) | |
| Data di pubblicazione: | 2015 | |
| Stato di pubblicazione: | Pubblicato | |
| Rivista: | ||
| Abstract: | Fluctuations of the atomic positions are at the core of a large class of unusual material properties ranging from quantum para-electricity to high temperature superconductivity. Their measurement in solids is the subject of an intense scientific debate focused on seeking a methodology capable of establishing a direct link between the variance of the atomic displacements and experimentally measurable observables. Here we address this issue by means of non-equilibrium optical experiments performed in shot-noise limited regime. The variance of the time dependent atomic positions and momenta is directly mapped into the quantum fluctuations of the photon number of the scattered probing light. A fully quantum description of the non-linear interaction between photonic and phononic fields is benchmarked by unveiling the squeezing of thermal phonons in $alpha$-quartz. | |
| Handle: | http://hdl.handle.net/11368/2861180 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1038/ncomms10249 | |
| URL: | https://www.nature.com/articles/ncomms10249 | |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
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| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Photon number statistics uncover the fluctuations in non-equilibrium lattice dynamics.pdf | pdf articolo e corrigendum | Documento in Versione Editoriale |  | Open Access Visualizza/Apri |
