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Scientists may have found the holy grail of quantum computing
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Gsus4 mander.xyz Gsus4@mander.xyz
Joined: 2023-08-25
Quote

Scientists may have spotted a long-sought triplet superconductor — a material that can transmit both electricity and electron spin with zero resistance. That ability could dramatically stabilize quantum computers while slashing their energy use. Early experiments suggest the alloy NbRe behaves unlike any conventional superconductor. If verified, it could become a cornerstone of next-generation quantum and spintronic technology.

essentially a conductor for "spin currents"

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altphoto lemmy.today altphoto@lemmy.today
Joined: 2025-04-14
#2 · Quote Reply

NbRe? Why not a computer made of rhino horn ivory?

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West_of_West piefed.social West_of_West@piefed.social
Joined: 2025-08-15
#3 · (edited) Quote Reply

"The fact that triplet superconductors have spin has an important consequence. We can now transport not only electrical currents but also spin currents with absolutely zero resistance," explained Linder.

That ability could make it possible to transmit information using spin without any energy loss. In turn, extremely fast computers could operate using almost no electricity at all.

I don't know what any of this means... but cool!

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GreenKnight23 lemmy.world GreenKnight23@lemmy.world
Joined: 2024-09-21
#4 · Quote Reply

just in time for all the bad press it got last week!

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SkaveRat discuss.tchncs.de SkaveRat@discuss.tchncs.de
Joined: 2023-07-09
#5 · Quote Reply

"The fact that triplet superconductors have spin has an important consequence. We can now transport not only electrical currents but also spin currents with absolutely zero resistance," explained Linder. That ability could make it possible to transmit information using spin without any energy loss. In turn, extremely fast computers could operate using almost no electricity at all. I don't know ...

Still need massive amounts of energy to cool them down to superconducting temperatures

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ageedizzle piefed.ca ageedizzle@piefed.ca
Joined: 2026-02-04
#6 · Quote Reply

Still need massive amounts of energy to cool them down to superconducting temperatures
[deleted]
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SkaveRat discuss.tchncs.de SkaveRat@discuss.tchncs.de
Joined: 2023-07-09
#7 · Quote Reply

[deleted]

It is very hard to cool things down in space

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ageedizzle piefed.ca ageedizzle@piefed.ca
Joined: 2026-02-04
#8 · Quote Reply

It is very hard to cool things down in space
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SkaveRat discuss.tchncs.de SkaveRat@discuss.tchncs.de
Joined: 2023-07-09
#9 · Quote Reply

[deleted]

No, in general

There only way to expell heat is via radiation, which is very slow

https://youtu.be/-w6G7VEwNq0

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ageedizzle piefed.ca ageedizzle@piefed.ca
Joined: 2026-02-04
#10 · Quote Reply

No, in general There only way to expell heat is via radiation, which is very slow https://youtu.be/-w6G7VEwNq0
[deleted]
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Alloi lemmy.world Alloi@lemmy.world
Joined: 2025-02-16
#11 · Quote Reply

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village604 adultswim.fan village604@adultswim.fan
Joined: 2025-09-27
#12 · (edited) Quote Reply

[deleted]

Yeah, getting rid of heat is the main issue in space. Insulating against cold is trivial.

But the principle behind it is why vacuum insulated tumblers can hold ice/hot liquid for so long.

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Pommes_für_dein_Balg feddit.org mech@feddit.org
Joined: 2025-10-06
#13 · Quote Reply

So...does this mean it will soon be able to multiply two-digit numbers?

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SmoothOperator lemmy.world SmoothOperator@lemmy.world
Joined: 2023-07-08
#14 · Quote Reply

So...does this mean it will soon be able to multiply two-digit numbers?

It would be a terrible machine for that. Never use a quantum computer to multiply numbers.

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Pommes_für_dein_Balg feddit.org mech@feddit.org
Joined: 2025-10-06
#15 · Quote Reply

It would be a terrible machine for that. Never use a quantum computer to multiply numbers.

Isn't that kind of a thing it needs to do to find the factorials of large numbers to break traditional encryption?

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MousePotatoDoesStuff lemmy.world MousePotatoDoesStuff@lemmy.world
Joined: 2025-03-09
#16 · Quote Reply

It is very hard to cool things down in space

How about in a crater on a Moon pole?

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SmoothOperator lemmy.world SmoothOperator@lemmy.world
Joined: 2023-07-08
#17 · Quote Reply

Isn't that kind of a thing it needs to do to find the factorials of large numbers to break traditional encryption?

Not really. It needs to apply unitary operators to elements in Hilbert space, which is essentially multiplying matrices onto vectors.

Which you could do by multiplying the involved numbers one by one, as most classical methods would, but then you're missing the point of using a quantum computer.

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