Publications by authors named "Daniel S Tasca"
Article Synopsis
- - We explored how spin and orbital angular momentum can interact during a process called frequency upconversion, using special light beams known as structured light beams.
- - In our experiment, we combined a unique vector vortex beam with a circularly polarized Gaussian beam, resulting in a second harmonic beam that retains features from the vector vortex.
- - We observed a crosstalk effect where the polarization of the Gaussian beam influences the relative phases of the components, allowing for a transfer of angular momentum, and our findings closely align with theoretical predictions.
Uncertainty relations involving incompatible observables are one of the cornerstones of quantum mechanics. Aside from their fundamental significance, they play an important role in practical applications, such as detection of quantum correlations and security requirements in quantum cryptography. In continuous variable systems, the spectra of the relevant observables form a continuum and this necessitates the coarse graining of measurements.
View Article and Find Full Text PDFThe notion of mutual unbiasedness for coarse-grained measurements of quantum continuous variable systems is considered. It is shown that while the procedure of "standard" coarse graining breaks the mutual unbiasedness between conjugate variables, this desired feature can be theoretically established and experimentally observed in periodic coarse graining. We illustrate our results in an optics experiment implementing Fraunhofer diffraction through a periodic diffraction grating, finding excellent agreement with the derived theory.
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