Quantum computing

Message boards : Science (non-SETI) : Quantum computing
Message board moderation

To post messages, you must log in.

AuthorMessage
Dr Who Fan
Volunteer tester
Avatar

Send message
Joined: 8 Jan 01
Posts: 2694
Credit: 715,342
RAC: 4
United States
Message 2084577 - Posted: 18 Sep 2021, 21:18:42 UTC

Otherworldly 'time crystal' made inside Google quantum computer could change physics forever
With the ability to forever cycle between two states without ever losing energy, time crystals dodge one of the most important laws of physics — the second law of thermodynamics, which states that the disorder, or entropy, of an isolated system must always increase. These bizarre time crystals remain stable, resisting any dissolution into randomness, despite existing in a constant state of flux.

ID: 2084577 · Report as offensive     Reply Quote
Profile tullio
Volunteer tester

Send message
Joined: 9 Apr 04
Posts: 8656
Credit: 2,930,782
RAC: 1
Italy
Message 2084991 - Posted: 25 Sep 2021, 19:21:41 UTC
Last modified: 25 Sep 2021, 19:23:07 UTC

The Berkeley U newsletter says that the Lawrence Berkeley National Laoratory and Berkeley UC have received a grant of 12.5 million dollars from the US Department of Energy to develop and and test a quantum Internet. The grant will cover 5 years.
Tullio
ID: 2084991 · Report as offensive     Reply Quote
Profile tullio
Volunteer tester

Send message
Joined: 9 Apr 04
Posts: 8656
Credit: 2,930,782
RAC: 1
Italy
Message 2085283 - Posted: 30 Sep 2021, 17:23:50 UTC
Last modified: 30 Sep 2021, 17:45:00 UTC

IBM says that it will build by 2023 a quantum computer called Quantum Condor with 1121 qubits . Recently Chinese scientists have built one with 66 qubits, while Google and also IBM are today at 72 and 53 qubits. The Google unit is called Bristlecone, while one with .53qubits was Sycamore. The IBM unit was called Q System 1.
Tullio
ID: 2085283 · Report as offensive     Reply Quote
Profile William Rothamel
Avatar

Send message
Joined: 25 Oct 06
Posts: 3756
Credit: 1,999,735
RAC: 4
United States
Message 2085353 - Posted: 1 Oct 2021, 12:26:19 UTC - in response to Message 2084577.  
Last modified: 1 Oct 2021, 12:27:18 UTC

So lets see. The putative electron orbiting the nucleus of an atom would also be changing it's state or jumping from one orbit to the next.

Is this "quantum" as well. Those who dabble in things quantum should not be allowed to bamboozle us with "wierdness".
How about clear explanations of what is going on and what we may not know but create convenient fictions to explain and control--such as the electron itself.
ID: 2085353 · Report as offensive     Reply Quote
Profile tullio
Volunteer tester

Send message
Joined: 9 Apr 04
Posts: 8656
Credit: 2,930,782
RAC: 1
Italy
Message 2085475 - Posted: 3 Oct 2021, 3:47:07 UTC

When J.J.Thomson discovered the electron in 1897 a toast at the Cavendish Laboratory in Cambridge was "to the electron! May it not be useful to anybody!". Last famous words.
Tullio
ID: 2085475 · Report as offensive     Reply Quote
Profile tullio
Volunteer tester

Send message
Joined: 9 Apr 04
Posts: 8656
Credit: 2,930,782
RAC: 1
Italy
Message 2088474 - Posted: 19 Nov 2021, 19:37:03 UTC

IBM has announced a new quantum computer, sporting 127 qubits, more than twice its previous atttempt. It is nicknamed "Eagle". like the prototype machine in Data General described in the book "The soul of a new machine" by Tracy Kidder. Now Data General no longer exists, like most of the computer firms of the first generation, called "IBM and the seven midgets". Only IBM survives.
Tullio
ID: 2088474 · Report as offensive     Reply Quote
Profile Wiggo
Avatar

Send message
Joined: 24 Jan 00
Posts: 28347
Credit: 261,360,520
RAC: 489
Australia
Message 2089740 - Posted: 7 Dec 2021, 8:25:40 UTC

Scientists Observe Quantum Spin Liquids: A State of Matter We've Never Seen Before.

An exotic and totally new state of matter called a quantum spin liquid has been hypothesized for decades, and now scientists have been able to observe it in a laboratory for the first time.

The 'liquid' part refers to electrons that are constantly changing and fluctuating inside a magnetic material at low temperatures. Unlike regular magnets, in this case the electrons don't stabilize or settle into the structured lattice of a solid as they are cooled.....

....For a quantum computer, that's hugely important. These systems can be very delicate, and getting them working for extended periods of time without errors is one of the biggest challenges that scientists are working on.

Now that quantum spin liquids have been spotted for the first time, it should help in figuring out how to make qubits as robust as possible. There's now a lot more to explore, the researchers say.

"Learning how to create and use such topological qubits would represent a major step toward the realization of reliable quantum computers," says quantum physicist Giulia Semeghini from Harvard University.
Cheers.
ID: 2089740 · Report as offensive     Reply Quote
Dr Who Fan
Volunteer tester
Avatar

Send message
Joined: 8 Jan 01
Posts: 2694
Credit: 715,342
RAC: 4
United States
Message 2092779 - Posted: 24 Jan 2022, 17:13:51 UTC

IBM forges entanglement to double quantum simulations by 'cutting up a larger circuit into smaller circuits'
Littler circuits executing on smaller hardware and tolerating 'a lot more noise'
IBM says it has found a way to solve problems using fewer qubits than before, effectively doubling the capability of a quantum system by combining both quantum and classical resources.

ID: 2092779 · Report as offensive     Reply Quote
Profile tullio
Volunteer tester

Send message
Joined: 9 Apr 04
Posts: 8656
Credit: 2,930,782
RAC: 1
Italy
Message 2092855 - Posted: 25 Jan 2022, 15:21:52 UTC
Last modified: 25 Jan 2022, 15:22:27 UTC

DeepMind, now owned and financed by Google, has made a quantum leap in biological computing using neural nets in its AlphaFold1 and AlphaFold2 . DeepMind had beaten the world champion of Go, a Chinese game, and followed the same path in calculation of protein structures starting from amminoacids sequences. The Rosetta@home project of the University of Washington, a BOINC project, is cooperating with RoseTTAFold of the same University which makes use of AlphaFold, an open project. The Spike protein is used by Covid-19..

Tullio
ID: 2092855 · Report as offensive     Reply Quote
Dr Who Fan
Volunteer tester
Avatar

Send message
Joined: 8 Jan 01
Posts: 2694
Credit: 715,342
RAC: 4
United States
Message 2097620 - Posted: 12 Apr 2022, 16:24:51 UTC

A variety of new Quantum Computing News from this TechRepublic article.

Quantum computing ecosystem expands in all directions
It’s hard to keep up with all the news coming out of the quantum computing industry these days. The quantum ecosystem is growing in all directions from academic to corporate boardrooms and producing new hardware, software and partnerships.

ID: 2097620 · Report as offensive     Reply Quote
Dr Who Fan
Volunteer tester
Avatar

Send message
Joined: 8 Jan 01
Posts: 2694
Credit: 715,342
RAC: 4
United States
Message 2097699 - Posted: 14 Apr 2022, 1:33:01 UTC

Intel ships mystery quantum hardware to national lab
"The Intel piece will be the first major component installed in Argonne’s quantum foundry, which will serve as a factory for creating and testing new quantum materials and devices. It is expected to be completed this year," the national lab said.

ID: 2097699 · Report as offensive     Reply Quote
Profile William Rothamel
Avatar

Send message
Joined: 25 Oct 06
Posts: 3756
Credit: 1,999,735
RAC: 4
United States
Message 2097724 - Posted: 14 Apr 2022, 11:53:16 UTC - in response to Message 2097699.  

Probably some cryogenic stuff. I think this whole Quantum business should have been de-bunked by now. I would do it myself except I never found a course or an explanation that I could follow of how the logic worked. I suspect--as was the case 50 years ago, with neural modeling and threshold logic, that any logic coming out of any quantum cell would decompose into standard boolean logic and offer no advantage over today's modern computers with their advanced architecture. See Glorioso and Rothamel "Neural Modeling and Threshold Logic" COMADP Lab publication Report #71 US Army Electronics Command.
ID: 2097724 · Report as offensive     Reply Quote
Profile SciManStev Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
Volunteer tester
Avatar

Send message
Joined: 20 Jun 99
Posts: 6634
Credit: 121,090,076
RAC: 0
United States
Message 2098919 - Posted: 4 May 2022, 15:34:10 UTC

https://www.ibm.com/topics/quantum-computing
I was curious about how this worked, and found this article.
Warning, addicted to SETI crunching!
Crunching as a member of GPU Users Group.
GPUUG Website
ID: 2098919 · Report as offensive     Reply Quote
Profile Wiggo
Avatar

Send message
Joined: 24 Jan 00
Posts: 28347
Credit: 261,360,520
RAC: 489
Australia
Message 2099285 - Posted: 11 May 2022, 8:57:33 UTC

ID: 2099285 · Report as offensive     Reply Quote
Dr Who Fan
Volunteer tester
Avatar

Send message
Joined: 8 Jan 01
Posts: 2694
Credit: 715,342
RAC: 4
United States
Message 2100612 - Posted: 2 Jun 2022, 14:23:03 UTC
Last modified: 2 Jun 2022, 14:23:30 UTC

A man and his money are soon separated...
Quantum computing startup probed in report, securities suit
The Scorpion Capital report, issued May 3, provides a rigorously scathing assessment of the IonQ technology, which is described as "a useless toy that can't even add 1+1" as assessed by internal experiments run by unnamed but numerous quantum experts hired by Scorpion and exhaustively detailed in the full report.
ID: 2100612 · Report as offensive     Reply Quote
Profile Wiggo
Avatar

Send message
Joined: 24 Jan 00
Posts: 28347
Credit: 261,360,520
RAC: 489
Australia
Message 2101769 - Posted: 22 Jun 2022, 23:45:11 UTC

Be prepared for a major announcement today.

Former Australian of the Year makes quantum computing breakthrough.

Former Australian of the Year Professor Michelle Simmons has “beaten the world” to a quantum computing breakthrough, according to The Australian.

Silicon Quantum Computing will unveil the world’s first integrated computer circuit built up atom by atom in silicon.
More to follow.

Cheers.
ID: 2101769 · Report as offensive     Reply Quote
Michael Watson

Send message
Joined: 7 Feb 08
Posts: 1333
Credit: 2,098,506
RAC: 5
Message 2101773 - Posted: 23 Jun 2022, 1:14:22 UTC
Last modified: 23 Jun 2022, 1:54:27 UTC

The basic facts about this breakthrough are given in the article linked below. It's still not clear how they propose to deal with the special computing problems that such super-miniaturization pose.

I'm thinking mainly of unwanted interactions between adjacent circuits, the effects of impacts of secondary energetic particles from the atmosphere, and other causes of quantum decoherence.

https://www.startupdaily.net/topic/quantum-computing/an-australian-startup-just-made-a-major-breakthrough-in-quantum-computing/
ID: 2101773 · Report as offensive     Reply Quote
Profile Wiggo
Avatar

Send message
Joined: 24 Jan 00
Posts: 28347
Credit: 261,360,520
RAC: 489
Australia
Message 2101792 - Posted: 23 Jun 2022, 9:24:04 UTC

ID: 2101792 · Report as offensive     Reply Quote
Dr Who Fan
Volunteer tester
Avatar

Send message
Joined: 8 Jan 01
Posts: 2694
Credit: 715,342
RAC: 4
United States
Message 2102645 - Posted: 6 Jul 2022, 2:16:11 UTC

Actual quantum computers don't exist yet. But encryption to defeat them may do already
NIST pushes on with CRYSTALS-KYBER, CRYSTALS-Dilithium, FALCON, and SPHINCS+
ID: 2102645 · Report as offensive     Reply Quote
Profile Wiggo
Avatar

Send message
Joined: 24 Jan 00
Posts: 28347
Credit: 261,360,520
RAC: 489
Australia
Message 2104683 - Posted: 8 Aug 2022, 22:30:46 UTC

Meanwhile in Japan a Record-Breaking Experiment Could Solve a Huge Challenge in Quantum Computing.

Two atoms inflated to an almost comical size and cooled to a fraction above absolute zero have been used to generate a robust, insanely fast two-qubit quantum gate that could help overcome some of quantum computing's persistent challenges....

...Scientists have been experimenting with quantum gates based on different materials for some time, and have achieved some extraordinary breakthroughs. However, one problem has continued to be significant: the superpositions of the qubits can quickly and easily degrade thanks to external sources becoming entangled as well.

Speeding up the gate is the best way to resolve this issue: since that intrusion is generally slower than a millionth of a second (one microsecond), a quantum gate that is faster than this will be able to "outrun" the noise to produce accurate calculations.

To take a tilt at this goal using a slightly different approach to usual, a team of researchers led by physicist Yeelai Chew of the National Institutes of Natural Sciences in Japan turned to a complicated setup.

The qubits themselves are atoms of the metal rubidium in its gaseous state. Using lasers, these atoms were cooled to almost absolute zero, and positioned at a precise micron-scale distance from each other using optical tweezers – laser beams that can be used to manipulate atomic-scale objects.

Then, the physicists pulsed the atoms with lasers. This knocked electrons from the closest orbital distance to each of the atomic nuclei into a very wide orbital separation, puffing the atoms up into objects known as Rydberg atoms. This produced a 6.5-nanosecond periodic exchange of orbital shape and electron energy between the now huge atoms....
Cheers.
ID: 2104683 · Report as offensive     Reply Quote

Message boards : Science (non-SETI) : Quantum computing


 
©2022 University of California
 
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.