Psychological Impact of the Pandemic on Ambulatory Cardiometabolic Patients Without Evidence of SARS-CoV-2 Infection. The CorCOVID Latam Psy Study.

Background: The COVID-19 pandemic's mental health consequences remain unknown.

Aim: To assess the mental health status of ambulatory cardiometabolic patients during COVID-19 pandemic lockdown in Spanish speaking Latin American countries.

Methods: Cardiometabolic patients without COVID-19 evidence in 13 Latin American countries answered a survey between June 15th and July 15th, 2020.

Mutual Unbiasedness in Coarse-Grained Continuous Variables.

The 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.