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arXiv:1607.05719 · Annals of Physics

Entanglement Enabled Intensity Interferometry of different wavelengths of light

Jordan S. Cotler, Frank A. Wilczek, Victoria Borish

Published Nov 11, 2020• 9 citations
arXivHTMLPDF
DOI
10.1016/j.aop.2020.168346

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Subpicosecond coincidence timing from nonlocal intensity interference of entangled photons allows quantum interferometry for plasmas. Using a warm plasma dispersion relation, we correlate phase measurement sensitivity with different plasma properties or physics mechanisms over six orders of magnitude. Due to Nα (α≤−1/2) scaling with the photon number N, quantum interferometry using entangled light can probe small signals in plasmas not previously accessible. As an example, it is predicted that plasmas will induce shifts to a Gaussian dip, a well-known quantum optics phenomenon that is yet to be demonstrated for plasmas.
In this work, we consider nonlocal dispersion cancellation with classical light in a setup. We demonstrate that the dispersion cancellation phenomenon of temporally entangled two-photon states of light in continuous-wave (CW) pumped SPDC can be similarly obtained in intensity interferometry with classical, stationary radiation that obeys Gaussian statistics. Specifically, we show that the correlation of the intensity fluctuations that would be measured in a setup plays the role of the temporally resolved intensity coincidence detection measured (a) (the original setup for the dispersion cancellation). The only difference is a different dispersion compensation rules which comes from the fact that CW-pumped SPDC photons are anticorrelated in frequency, whereas stationary light has, by definition, uncorrelated spectrum.