[ExI] Quantum Radar

[John Clark]

On Sun, Sep 1, 2019 at 9:15 PM Stuart LaForge via extropy-chat <
extropy-chat at lists.extropy.org> wrote:

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> * > Cool new tech: Quantum Radar. A team of scientists at the Institute
> of  Science and Technology in Austria just invented a cool new kind of
> radar. It uses quantum entangled pairs of microwave photons to  drastically
> reduce the power consumption of radar and also makes radar  surveillance
> difficult to detect. This is one of the coolest practical  applications
> quantum entanglement that has been rendered into practice.*
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> https://www.technologyreview.com/s/614160/quantum-radar-has-been-demonstrated-for-the-first-time/
> https://arxiv.org/abs/1908.03058


Apparently this is an idea whose time has come because they're not just
using it with microwave photons for use in radar they've done it with X
rays too, although before this becomes practical for medical applications a
way must be found to shrink the size of the particle accelerator that
produces the X ray photons:

Quantum Enhanced X-ray Detection
<https://journals.aps.org/prx/pdf/10.1103/PhysRevX.9.031033>

They say they have been able to "*improve the visibility and the
signal-to-noise ratio of an image with a small number of photons in an
environment with a noise level that is higher than the signal by many
orders of magnitude*". If they could determine whether the photons are
entangled or not they could vastly improve the resolution of the picture
even more, but to do that they'd have to measure the time the photons hit
the detector with Attosecond (10^-18 sec) accuracy and that is beyond
current technology. That's one of many reasons i think the development of a
Thorium-229 nuclear clock is so important, it could bring accuracy to the
10^-19 sec level.

En route to the optical nuclear clock
<https://phys.org/news/2018-04-en-route-optical-nuclear-clock.html>

I can't help but wonder if a brain scan made with this technology would
provide enough information for a mind upload.

  John K Clark
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