“Multimode quantum(-inspired) optics”

Light can be described as an ensemble of many optical modes, i.e. normalised solutions to Maxwell’s equations. Yet, such a choice of modes is not unique. The same optical signal can be decomposed in to a wide variety of different mode bases. Being able to measure individual modes in a well-chosen mode basis opens pathways to many quantum(-inspired) application.

As a first such application, we will discuss the problem of distance estimation. Whether in biological samples or in astronomy, Rayleigh’s curse puts a limit on the precision that can be achieved with a naive direct imaging approach. However, if one demultiplexes the signal into a well-chosen mode basis, this curse can be lifted. We will see how such super-resolution techniques can be realistically implemented.

As a second application, we will consider the potential of multimode systems for quantum computing. As a first step, it will be explained how certain types of Gaussian quantum correlations are necessary to create quantum states with non-positive Wigner functions. Such quantum states are in turn an important resource for quantum computing. As a next step, we will see that quantum correlations themselves can acquire a non-Gaussian character and how we can use techniques from parameter estimation to assess these non-Gaussian quantum correlations.

Transmisión vía Youtube en: bit.ly/YouTube_ICF

Participante: Dr. Mattia Walschaers

Institución: Laboratoire Kastler Brossel, Paris, France

Fecha y hora: Este evento terminó el Miércoles, 17 de Noviembre de 2021