4 ms·

The Imperial College researcher who builds these things describes his research here: https://www.imperial.ac.uk/centre-for-cold-matter/research/quantum-navigati

The Imperial College researcher who builds these things describes his research here: https://www.imperial.ac.uk/centre-for-cold-matter/research/quantum-navigation/ https://www.imperial.ac.uk/centre-for-cold-matter/research/q... The page claims that this device attempts to measure acceleration accurately enough that position can be determined (by integrating over time, twice).

anovikov 3y ago
So just a more precise dead reckoning? But it has a square law of precision so can never work for long enough anyway.
jackdh 3y ago
It's off topic however on the people page[0] of the above link, I enjoyed going through to try and spot the photoshopped in ones! [0]https://www.imperial.ac.uk/centre-for-cold-matter/people/ https://www.imperial.ac.uk/centre-for-cold-matter/people/
- clintfred 3y ago
  That was fun. That whole left side has a lot of suspicious lighting, doesn't it?!
  - jackdh 3y ago
    Indeed! There is also a mystery leg between the legs of the second chap in from the right.
andyjohnson0 3y ago
I'm not a physicist but this reads like a more sensitive type of inertial navigation, which currently uses gyroscopes. https://en.wikipedia.org/wiki/Inertial_navigation_system https://en.wikipedia.org/wiki/Inertial_navigation_system
- 1letterunixname 3y ago
  Vacuum mechanical gyros were used until about the 1960's when lasers (RLGs) were introduced. In the 90's, some RLGs were replaced by HRGs where space is at a premium for Q around 1e7-8. Very large RLGs are still used to detect very slow rotation and can have Q factors on the order of 1e13.
  - WastingMyTime89 3y ago
    Yes, also, while I have only worked on military boats and never on subs, I can straight away tell you that anyone who would know anything remotely interesting or close to the cutting edge regarding inertial navigation system for subs wouldn't be able to talk about it. It's one of these subjects where you will never get anything better that vague press releases designed to justify research budgets.
sampo 3y ago
In the TV show The Big Bang Theory, they invented a quantum vortex based inertial guidance system in 2016. Initially in https://bigbangtheory.fandom.com/wiki/The_Positive_Negative_Reaction https://bigbangtheory.fandom.com/wiki/The_Positive_Negative_... Then later https://www.youtube.com/watch?v=az44pMHvUYk https://www.youtube.com/watch?v=az44pMHvUYk
- travisgriggs 3y ago
  Came here to see if anyone else had noticed this too. :)
AndrewKemendo 3y ago
I couldn’t tell from the abstract but does the device measure the atom drift in 3 dimensions or do we need a sensor fusion of three atoms to get 3D translation?

anovikov 3y ago

So just a more precise dead reckoning? But it has a square law of precision so can never work for long enough anyway.

jackdh 3y ago

It's off topic however on the people page[0] of the above link, I enjoyed going through to try and spot the photoshopped in ones! [0]https://www.imperial.ac.uk/centre-for-cold-matter/people/ https://www.imperial.ac.uk/centre-for-cold-matter/people/

clintfred 3y ago
That was fun. That whole left side has a lot of suspicious lighting, doesn't it?!
- jackdh 3y ago
  Indeed! There is also a mystery leg between the legs of the second chap in from the right.

andyjohnson0 3y ago

I'm not a physicist but this reads like a more sensitive type of inertial navigation, which currently uses gyroscopes. https://en.wikipedia.org/wiki/Inertial_navigation_system https://en.wikipedia.org/wiki/Inertial_navigation_system

1letterunixname 3y ago
Vacuum mechanical gyros were used until about the 1960's when lasers (RLGs) were introduced. In the 90's, some RLGs were replaced by HRGs where space is at a premium for Q around 1e7-8. Very large RLGs are still used to detect very slow rotation and can have Q factors on the order of 1e13.
- WastingMyTime89 3y ago
  Yes, also, while I have only worked on military boats and never on subs, I can straight away tell you that anyone who would know anything remotely interesting or close to the cutting edge regarding inertial navigation system for subs wouldn't be able to talk about it. It's one of these subjects where you will never get anything better that vague press releases designed to justify research budgets.

sampo 3y ago

In the TV show The Big Bang Theory, they invented a quantum vortex based inertial guidance system in 2016. Initially in https://bigbangtheory.fandom.com/wiki/The_Positive_Negative_Reaction https://bigbangtheory.fandom.com/wiki/The_Positive_Negative_... Then later https://www.youtube.com/watch?v=az44pMHvUYk https://www.youtube.com/watch?v=az44pMHvUYk

travisgriggs 3y ago
Came here to see if anyone else had noticed this too. :)

AndrewKemendo 3y ago

I couldn’t tell from the abstract but does the device measure the atom drift in 3 dimensions or do we need a sensor fusion of three atoms to get 3D translation?