this post was submitted on 19 Sep 2024
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Indestructible quartz crystal can store 360TB of data for billions of years (www.techspot.com)
submitted 2 months ago by [email protected] to c/[email protected]
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Researchers at the University of Southampton in the UK successfully stored the entirety of the human genome sequence onto an indestructible 5D optical memory crystal no bigger than a penny. The indestructibility claims are no joke since the discs can withstand temperatures up to 1,000°C, cosmic radiation, and even direct impact forces of 10 tons per cm2.

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[–] zero_spelled_with_an_ecks 78 points 2 months ago (10 children)

The '5D' in the name comes from the fact that, unlike 2D markings on a piece of paper or tape, this method uses two optical dimensions and three spatial coordinates to write throughout the material.

Went to the article seeking answers but got only more questions.

[–] [email protected] 69 points 2 months ago* (last edited 2 months ago) (6 children)

https://en.m.wikipedia.org/wiki/5D_optical_data_storage

The "5-dimensional" descriptor is only a marketing term, since the device has 3 physical dimensions and no exotic higher dimensional properties. The fractal/holographic nature of its data storage is also purely 3-dimensional. The size, orientation and three-dimensional position of the nanostructures comprise the so-called five dimensions.

☹️

/edit

Further down in the article it is a little clearer...

In this case, the 5 dimensions inside of the discs are the size and orientation in relation to the 3-dimensional position of the nanostructures. The concept of being 5-dimensional means that one disc has several different images depending on the angle that one views it from, and the magnification of the microscope used to view it.

The website even lists a little more...

In order to increase the data capacity of optical storage, there is the potential of storing more than one bit in a single voxel by implementing multiplex technology. The recently developed 5D optical storage technique uses birefringence as an extra degree of freedom – the property of a medium whereby its refractive index varies depending on the polarization and direction of incident light. Birefringence generated by the orientation and size of optical nano-gratings offers two extra dimensions, providing much higher storage capacities.

So, it's supposedly three dimensions of position plus angle and (maybe?) polarity. So, it seems to be more than just a marketing gimmick, but I can't find any information about the resolution of those additional two parameters, so I can't tell if a single voxel stores two bits or two terabits.

[–] towerful 5 points 2 months ago (1 children)

Seems more like 5 axis than 5 dimensions.
Sounds like a slice through the crystal that can be moved up and down and rotated through 2 angles (eg roll and pitch)

[–] [email protected] 4 points 2 months ago (1 children)

5 axis and 5 dimensions are essentially the same thing, right? A 2D graph has 2 axes, a 3D one has three, 4D graph can be shown with colour representing the 4th axis, etc.

[–] towerful 1 points 2 months ago

Yeh, axis was the wrong term. I was thinking degrees of freedom.
However, I misunderstood the concept.

The extra dimensions are basically optical manipulation, like the other comment says with the red and blue lenses.

I thought it was more about the crystals attitude. So in addition to x, y and z, you also have alpha, beta, gamma.
Which would be 3 dimensions/axis with 6 degrees of freedom

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