Modern Aspects of Intensity Interferometry With Classical Light

Tomohiro Shirai

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

Timothy J. Schulz, Neeraj K. Gupta

Amplitude interferometry and intensity interferometry are methods for processing the complex amplitude and the intensity, respectively, of an electromagnetic field to estimate the mutual intensity of the field at two spatial locations. Whereas complex amplitude measurements allow for the direct estimation of the mutual-intensity phase, intensity measurements do not. We consider applications for which the estimation of the magnitude or the squared magnitude of the mutual intensity is adequate, and we provide fundamental limits on the estimation accuracy of any unbiased estimator of the squared magnitude of the mutual intensity from coherent (complex amplitude) or incoherent (intensity) measurements. Our analysis is performed for the high-light-level (classical-noise-limit) case and quantifies the advantages of making the more difficult coherent measurements.

Andreas Zmija, Peter Deiml, A. Zink +7 more

Daniel F. Walls, Murray Holland

Gerd Leuchs, Christine Silberhorn, O. Glöckl +2 more

Abstract For intense optical pulses the optical Kerr interaction in matter such as an optical fiber is large enough to generate quantum states of light with significant non‐classical properties. On this basis pairs of entangled light pulses have been generated. This entanglement can be used for novel schemes in high precision interferometry and for quantum communication protocols such as quantum dense coding.