Photon number statistics uncover the fluctuations in non-equilibrium lattice dynamics
Photon number statistics uncover the fluctuations in non-equilibrium lattice dynamics
复制标题
光子数统计揭示了非平衡晶格动力学的波动
作者：
M. Esposito;K. Titimbo;K. Zimmermann;F. Giusti;F. Randi;D. Boschetto;F. Parmigiani;R. Floreanini;F. Benatti;D. Fausti
原子位置的波动是一大类不寻常材料性质的核心，从量子准电性到高温超导性。它们在固体中的测量是一个激烈的科学辩论的主题，其重点是寻求一种能够在原子位移的变化和实验可测量的观察物之间建立直接联系的方法。在这里，我们通过在短噪声限制下进行的非平衡光学实验来解决这个问题。随时间变化的原子位置和动量的变化直接映射到散射探测光的光子数的量子涨落。通过揭示α-石英中热声子的压缩，对光子和声子场之间的非线性相互作用进行了全面的量子描述。原子位置的波动与几种材料性质有关。本文作者通过非平衡光学实验测量光子数统计，并提供光子和声子场之间相互作用的量子描述，以揭示石英中的晶格动力学波动。
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 α-quartz. Fluctuations of atomic positions are related to several materials properties. Here the authors measure the photon number statistics via a non-equilibrium optical experiment and provide a quantum description of the interaction between photonic and phononic fields to reveal lattice dynamics fluctuations in quartz.
影响因子：
56.9
作者：
Riek, C.;Seletskiy, D. V.;Leitenstorfer, A.
通讯作者：
Leitenstorfer, A.