arXiv subjects

E. Zubizarreta Casalengua

Publications and source records attributed to E. Zubizarreta Casalengua.

3 recordsLinked to original sources

arXiv2021

Multiphoton Emission

We describe the emission, detection and structure of multiphoton states of light. We include the effect of frequency filtering, which describes, at a fundamental level, physical detection of a quantum emitter. The case of the spontaneous emission of Fock states is treated fully and analytically. We stress this picture by contrasting it to the numerical simulation of two-photon bundles emitted from a two-level system in a cavity. We show that dynamical factors exist that allow for a more robust multiphoton emission than spontaneous emission. We also describe how this relates to thermal light.

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arXiv2019

Conventional and unconventional photon statistics

We show how the photon statistics emitted by a large variety of light-matter systems under weak coherent driving can be understood, to lowest order in the driving, in the framework of an admixture of (or interference between) a squeezed state and a coherent state, with the resulting state accounting for all bunching and antibunching features. One can further identify two mechanisms that produce resonances for the photon correlations: i) conventional statistics describes cases that involve a particular quantum level or set of levels in the excitation/emission processes with interferences occurring to all orders in the photon numbers, while unconventional statistics describes cases where the driving laser is far from resonance with any level and the interference occurs for a particular number of photons only, yielding stronger correlations but only for a definite number of photons. Such an understanding and classification allows for a comprehensive and transparent description of the photon statistics from a wide range of disparate systems, where optimum conditions for various types of photon correlations can be found and realized.

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arXiv2017

Structure of the Harmonic Oscillator in the space of $n$-particle Glauber correlators

We map the Hilbert space of the quantum Harmonic oscillator to the space of Glauber's $n$th-order intensity correlators, in effect showing "the correlations between the correlators" for a random sampling of the quantum states. In particular, we show how the popular $g^{(2)}$ function is correlated to the mean population and how a recurrent criterion to identify single-particle states or emitters, namely $g^{(2)}<1/2$, is incorrect as states exist that satisfy this condition with average population larger than one. Our charting of the Hilbert space allows to capture its structure in a simpler and physically more intuitive way that can be used to classify quantum sources by surveying which territory they can access.

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