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Royal Navy says quantum navigation test a success

thequantuminsider.com

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Re: Royal Navy says quantum navigation test a success

#101

Post by JumpCrisscross »

themodelplumber wrote: post #19
jchallis wrote: post #13

This is the most obvious practical application of my PhD topic. A Bose Einstein Condensate is an extremely sensitive detector of gravity- a nuclear submarine could use it to make an ultra-accurate map of the world based on variations in the gravitational constant g. This would remove one of the primary reasons subs need to surface , in order to GPS lock. It’s a naval chart that would not require surfacing. A French p…

Fascinating. Q for you since you are so clued in. I am a ham radio operator and was thinking about novel forms of signal propagation. I landed on the idea of gravitons. Could gravitonic signal propagation be done somehow? While researching, I keep coming across familiar terms I know from radio land. Just curious if the fields here could be harnessed for communication. Thanks.

Aren’t neutrinos holy grail for signals?

Re: Royal Navy says quantum navigation test a success

#102

Post by sampo »

gnfargbl wrote: post #36

The Imperial College researcher who builds these things describes his research here: 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).

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_...

Then later https://www.youtube.com/watch?v=az44pMHvUYk

Re: Royal Navy says quantum navigation test a success

#104

Post by reportgunner »

UberFly wrote: post #34
bottom999mottob wrote: post #33

Earlier quoted context omitted.

There is no way anyone would hyperbolize the experience of their friend squeezing a submarine through ravines on the internet.

Squeezing submarines through internet ravines sounds really interesting. Go on.

Is there a library for this ?

Re: Royal Navy says quantum navigation test a success

#105

Post by wongarsu »

rogers18445 wrote: post #29
jchallis wrote: post #13

This is the most obvious practical application of my PhD topic. A Bose Einstein Condensate is an extremely sensitive detector of gravity- a nuclear submarine could use it to make an ultra-accurate map of the world based on variations in the gravitational constant g. This would remove one of the primary reasons subs need to surface , in order to GPS lock. It’s a naval chart that would not require surfacing. A French p…

What would you do with the g measurement to get your location? Can g deltas be matched to sea floor contour maps? Otherwise it seems like subs would have to be following g-mapped routes.

I'd assume features below the sea floor have a much bigger impact than surface features. Large iron deposits, volcanic activity, natural gas deposits, whatever the LLSVPs are, etc. But you could use ships to correlate gravity measurements with GPS locations and make an accurate map that way. You don't need to map the entire ocean, just enough locations to allow subs to occasionally recalibrate their position.

Re: Royal Navy says quantum navigation test a success

#106

Post by samus »

otikik wrote: post #54
jchallis wrote: post #13

This is the most obvious practical application of my PhD topic. A Bose Einstein Condensate is an extremely sensitive detector of gravity- a nuclear submarine could use it to make an ultra-accurate map of the world based on variations in the gravitational constant g. This would remove one of the primary reasons subs need to surface , in order to GPS lock. It’s a naval chart that would not require surfacing. A French p…

A submarine itself is quite massive, and has big moving parts (e.g. the rotor). The crew has less mass, but it would be very close, and also in constant movement. Wouldn’t this interfere with those measurements? Would they need to stop the engine and play “frozen TikTok” while the measurement device is active?

Surely the influence of some of these sources of noise can be modeled and filtered out. A University of Vienna currently conducts experiments to measure the gravitational force at very small sales, and they already have to do this with things like crowds moving about the city during rush hours.

Re: Royal Navy says quantum navigation test a success

#107

Post by wongarsu »

thesz wrote: post #87
narenkeshav wrote: post #86

Earlier quoted context omitted.

Would it be possible to replicate that on mobile phones? Or a special device is required? 1. trying to figure out the feasibility?

https://en.wikipedia.org/wiki/Bose%E2%80%93Einstein_condensa... "n condensed matter physics, a Bose–Einstein condensate (BEC) is a state of matter that is typically formed when a gas of bosons at very low densities is cooled to temperatures very close to absolute zero (−273.15 °C or −459.67 °F)..." I guess, a special device is needed. The size of such device will be in thousands of mobile phones just in volume needed…

There wasn't much money in miniaturizing them so far. Cooling down tiny amounts of matter is much easier than cooling down larger amounts, so maybe there's hope for a microchip sized BEC in 20 years.

Re: Royal Navy says quantum navigation test a success

#108

Post by EVa5I7bHFq9mnYK »

jchallis wrote: post #13

This is the most obvious practical application of my PhD topic. A Bose Einstein Condensate is an extremely sensitive detector of gravity- a nuclear submarine could use it to make an ultra-accurate map of the world based on variations in the gravitational constant g. This would remove one of the primary reasons subs need to surface , in order to GPS lock. It’s a naval chart that would not require surfacing. A French p…

Can it also be used for missile guidance, in case of GPS denial?

Re: Royal Navy says quantum navigation test a success

#109

Post by sethammons »

dumpsterdiver wrote: post #91
sph wrote: post #76

Earlier quoted context omitted.

> any stable solar system capable of sustaining life will emit a steady heartbeat, just like a living being What do you mean? What would be the source of the regular wave-like signal, and why only systems with life have one? Do you mean that actual hearts beating create gravitational waves?

> What do you mean? What would be the source of the regular wave-like signal The source of the signal would be a solar system that contains planets in a stable enough orbit to harbor life. > and why only systems with life have one? Solar systems that harbor life (our own, for example) are not the only stable solar systems. A stable solar system is however required to be the genesis grounds of life as we understand it…

How does stability lead to a wave? We can see wobble in stars to know they are getting tugged by planets. Are you expecting similar with gravity?

I'm not a physicist nor astronomer. I wouldn't expect any gravity waves as I'd expect the star system to have a center of mass that stays in roughly the same space.

Re: Royal Navy says quantum navigation test a success

#110

Post by RobotToaster »

otikik wrote: post #54
jchallis wrote: post #13

This is the most obvious practical application of my PhD topic. A Bose Einstein Condensate is an extremely sensitive detector of gravity- a nuclear submarine could use it to make an ultra-accurate map of the world based on variations in the gravitational constant g. This would remove one of the primary reasons subs need to surface , in order to GPS lock. It’s a naval chart that would not require surfacing. A French p…

A submarine itself is quite massive, and has big moving parts (e.g. the rotor). The crew has less mass, but it would be very close, and also in constant movement. Wouldn’t this interfere with those measurements? Would they need to stop the engine and play “frozen TikTok” while the measurement device is active?

Mount it on a UUV?
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