Large-scale testing of the Einstein-Podolsky-Rosen paradox. Free Technical Library News

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Large-scale testing of the Einstein-Podolsky-Rosen paradox

18.06.2023

Scientists from the University of Basel in Switzerland have conducted a large-scale test of the Einstein-Podolsky-Rosen (EPR) paradox in quantum mechanics.

The researchers used two entangled Bose-Einstein condensates of 700 atoms each and demonstrated that the EPR paradox persists even in the presence of a cloud of hundreds of atoms. Such an observation was the first of its kind where the EPR paradox was investigated in spatially separated multiparticle systems.

The results of this experiment are important for the development of quantum metrology, the science of measuring things using quantum theory. Scientists note that the contradiction between quantum mechanics and local realism persists as the size of the system increases to a thousand massive particles.

The experiment offers new possibilities for applications in quantum metrology. One of the two systems can be used as a small, high spatial resolution sensor to study fields and forces, while the other system can serve as a reference for quantum noise reduction.

The EPR paradox, which indicates the incompleteness of the description of the reality of the Universe by quantum mechanics, remains relevant. The scientists emphasize that their results confirm the stability of the EPR paradox on a much larger scale than was previously demonstrated in Bell's experiments. These findings are important for future research in the field of quantum physics and can play a significant role in the development of quantum metrology.

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Cable Power Specification for HDMI Cables 15.06.2022

The HDMI Forum has published an amendment to the HDMI 2.1a standard describing Cable Power technology. With its help, accessory manufacturers will be able to get rid of external power supplies and other "crutches" when transmitting data over long distances without losing signal quality.

Modern HDMI cables have an implicit length limit of 3 meters to view content requiring full 48Gbps bandwidth without compromising signal stability or picture quality. When using longer accessories, as a rule, additional power adapters with a USB connector are used.

The new Cable Power specification allows additional power (up to 5V/0,3A) to be delivered directly through the accessory itself. Separate devices or connectors are not required - the power supply will be provided by the signal source itself (for example, a game console or media player).

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It is not yet known which commercial devices will be the first to receive support for the Cable Power standard. Its developers also report that owners of old equipment will be able to use new cables using special adapters for micro-USB Type-B or USB Type-C.

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