[HN Gopher] Researchers use tiny magnetic swirls to generate tru...
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       Researchers use tiny magnetic swirls to generate true random
       numbers
        
       Author : wjSgoWPm5bWAhXB
       Score  : 29 points
       Date   : 2022-02-08 11:41 UTC (1 days ago)
        
 (HTM) web link (phys.org)
 (TXT) w3m dump (phys.org)
        
       | sandworm101 wrote:
       | But are they more random than a wall of lava lamps?
       | 
       | https://en.wikipedia.org/wiki/Lavarand
       | 
       | In all seriousness, the movement of large objects would seem
       | inherently more random than the movements of individual
       | particles. The actual number and real points of failure come not
       | from the objects but from the devices that measure their
       | position.
        
         | jjn2009 wrote:
         | > the movement of large objects would seem inherently more
         | random than the movements of individual particles
         | 
         | sounds contrary to law of large numbers
        
       | rgbjoy wrote:
       | First I'm hearing about skyrmions. Fascinating stuff. Could this
       | be harnessed in a small form factor?
        
         | semi-extrinsic wrote:
         | Skyrmions were known in theory for a long time, but only
         | experimentally realized less than ten years ago. I guess you
         | can say they fall within the larger field of spintronics, where
         | people seek to exploit spin-charge coupling.
         | 
         | The most well-known example is of course giant
         | magnetoresistance (GMR), and later tunnel magnetoresistance,
         | which was a key piece of harddrive read head technology
         | development in the late 90s and 2000s.
         | 
         | GMR was discovered in 1988, and received the 2007 Nobel prize
         | in physics, and it was actually miniaturized sufficiently to be
         | used commercially in just 10 years.
        
       | emj wrote:
       | > When the skyrmion size changes, the voltage changes to an
       | extent that is easily measured
       | 
       | I wonder what easy means here; measuring the voltage, generating
       | the 2D material film, keeping it at the right temprature. 10
       | megabits sounds sweet, but I believe you could get that from CPUs
       | at least 10 years back. I'm guessing they could make this small
       | and energy effecient though, time will tell!
        
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