A New Type of Qubit
Australian researchers have designed a new type of qubit the building block of quantum computers that they say will finally make it possible to manufacture a true, large-scale quantum computer.
Broadly speaking, there are currently a number of ways to make a quantum computer. Some take up less space, but tend to be incredibly complex. Others are simpler, but if you want it to scale up youre going to need to knock down a few walls.
Some tried and true ways to capture a qubit are to use standard atom-taming technology such as ion traps and optical tweezers that can hold onto particles long enough for their quantum states to be analysed.
Others use circuits made of superconducting materials to detect quantum superpositions within the insanely slippery electrical currents.
The advantage of these kinds of systems is their basis in existing techniques and equipment, making them relatively affordable and easy to put together.
The cost is space the technology might do for a relatively small number of qubits, but when youre looking at hundreds or thousands of them linked into a computer, the scale quickly becomes unfeasible.
Thanks to coding information in both the nucleus and electron of an atom, the new silicon qubit, which is being called a flip-flop qubit, can be controlled by electric signals, instead of magnetic ones. That means it can maintain quantum entanglement across a larger distance than ever before, making it cheaper and easier to build into a scalable computer.
If theyre too close, or too far apart, the entanglement between quantum bits which is what makes quantum computers so special doesnt occur, says the researcher who came up with the new qubit, Guilherme Tosi, from the University of New South Wales in Australia.
The flip-flop qubit will sit in the sweet spot between those two extremes, offering true quantum entanglement across a distance of hundreds of nanometres.
In other words, this might be just what weve been waiting for to make silicon-based quantum computers scalable.
To be clear, so far we only have a blueprint of the device it hasnt been built as yet. But according to team leader, Andrea Morello, the development is as important for the field as the seminal 1998 paper in Nature by Bruce Kane, which kicked off the silicon quantum computing movement.
Like Kanes paper, this is a theory, a proposal the qubit has yet to be built, says Morello. We have some preliminary experimental data that suggests its entirely feasible, so were working to fully demonstrate this. But I think this is as visionary as Kanes original paper.
The flip-flop qubit works by coding information on both the electron AND nucleus of a phosphorus atom implanted inside a silicon chip,and connected with a pattern of electrodes. The whole thing is then chilled to near absolute zero and bathed in a magnetic field.
The qubits value is then determined by combinations of a binary property called spin if the spin is up for an electron while down for the nucleus, the qubit represents an overall value of 1. Reversed, and its a 0.
That leaves the superposition of the spin-states to be used in quantum operations.
In flip-flop, researchers are able to control the qubit using an electric field instead of magnetic signals which gives two advantages. It is easier to integrate with normal electronic circuits and, most importantly, it also means qubits can communicate over larger distances.
To operate this qubit, you need to pull the electron a little bit away from the nucleus, using the electrodes at the top. By doing so, you also create an electric dipole, says Tosi.
This is the crucial point, adds Morello. These electric dipoles interact with each other over fairly large distances, a good fraction of a micron, or 1,000 nanometres.
This means we can now place the single-atom qubits much further apart than previously thought possible. So there is plenty of space to intersperse the key classical components such as interconnects, control electrodes and readout devices, while retaining the precise atom-like nature of the quantum bit.
Its easier to fabricate than atomic-scale devices, but still allows us to place a million qubits on a square millimetre.
What this new flip-flop qubit means is a balance that could make future quantum computers small and potentially affordable.
Its a brilliant design, and like many such conceptual leaps, its amazing no-one had thought of it before, says Morello.
The research has been published in Nature Communications.
Continue reading here:
An Entirely New Type of Quantum Computing Has Just Been Invented - Futurism
- Amazon is now offering quantum computing as a service with Braket for AWS - The Verge - December 2nd, 2019
- ColdQuanta's Latest Ultracold Technology Heads to the International Space Station - Business Wire - December 2nd, 2019
- Researchers Discover New Way to Split and Sum Photons with Silicon - UT News | The University of Texas at Austin - December 2nd, 2019
- Archer Materials invited to chair quantum computing session at London conference - Proactive Investors Australia - December 2nd, 2019
- Archer Materials to chair Quantum Computing session at London Quantum.Tech Conference in 2020 - Proactive Investors Australia - November 30th, 2019
- The Future of Computing could be Magnetic - Robert Lea - Medium - November 30th, 2019
- Innovate, and grow - Economic Times - November 30th, 2019
- Tech news: The quantum internet is on the way - IOL - November 22nd, 2019
- Device Puts Photons in the Fast Lane - Optics & Photonics News - November 22nd, 2019
- Race is on to build quantum-proof encryption - Financial Times - November 21st, 2019
- Atos partners with Zapata to deliver complete quantum computing solution to the enterprise - Quantaneo, the Quantum Computing Source - November 20th, 2019
- NTT offers researchers $1 million salaries in bid to lure top talent in cryptography, quantum computing - The Japan Times - November 20th, 2019
- Information overload: The promise and risk of quantum computing - Bulletin of the Atomic Scientists - November 17th, 2019
- D-Wave sticks with its approach to quantum computing - TechCrunch - November 17th, 2019
- The Quantum Computing Threat to American Security - The Wall Street Journal - November 17th, 2019
- Dell Technologies on democratising 5G and the future of quantum computing - ZDNet - November 17th, 2019
- How Serious Is the Threat of Quantum Computing to Crypto? - Finance Magnates - November 17th, 2019
- Superconducting quantum computing - Wikipedia - October 6th, 2019
- Quantum computing | MIT News - October 6th, 2019
- How Do Quantum Computers Work? - sciencealert.com - October 2nd, 2019
- What is Quantum Computing? - Definition from Techopedia - October 2nd, 2019
- How Quantum Computers Work | HowStuffWorks - September 5th, 2019
- Quantum computing could change everything, and IBM is ... - May 15th, 2019
- Quantum Computing - Intel - April 29th, 2019
- IBM expands universities in its quantum computing research ... - April 25th, 2019
- Quantum computing is a marathon not a sprint | VentureBeat - April 22nd, 2019
- The CIO's Guide to Quantum Computing - Smarter With Gartner - April 19th, 2019
- This Startup Just Raised $21 Million To Bring Quantum ... - April 18th, 2019
- What is Quantum Computing ? Top 18 Quantum Computing ... - April 6th, 2019
- The promise of quantum computing - businessinsider.com - March 27th, 2019
- Quantum computing is coming: Heres why we need to get our ... - March 23rd, 2019
- Quantum computing will break your encryption in a few ... - March 21st, 2019
- Microsoft has formed a coalition to promote quantum computing ... - March 19th, 2019
- Quantum computing for everyone | Michael Nielsen - March 12th, 2019
- Ask a Techspert: What is quantum computing? - blog.google - March 6th, 2019
- IBM hits quantum computing milestone, may see 'Quantum ... - March 6th, 2019
- Its Time You Learned About Quantum Computing | WIRED - March 6th, 2019
- Microsofts quantum computing network takes a giant leap ... - March 2nd, 2019
- When Will Quantum Computing Have Real Commercial Value ... - February 25th, 2019
- The Case Against Quantum Computing - IEEE Spectrum - February 22nd, 2019
- How Does Quantum Computing Work? - ExtremeTech - January 31st, 2019
- Quantum technology - Wikipedia - January 23rd, 2019
- CES 2019: IBM's Q System One Is the Rock Star Quantum ... - January 13th, 2019
- Quantum Computing | The MIT Press - January 11th, 2019
- IBM thinks outside of the lab, puts quantum computer in a box - January 11th, 2019
- IBM unveils its first commercial quantum computer - January 9th, 2019
- A new type of quantum computer has smashed every record ... - December 21st, 2018
- China bet big on quantum computing. Now the US races to ... - October 26th, 2018
- US takes first step toward a quantum computing workforce ... - September 17th, 2018
- China bet big on quantum computing. Now the ... - money.cnn.com - September 17th, 2018
- The reality of quantum computing could be just three years ... - September 12th, 2018
- The quantum computing race the US cant afford to lose - September 3rd, 2018
- Quantum Computing | USRA - August 30th, 2018
- What Is Quantum Computing? The Complete WIRED Guide | WIRED - August 22nd, 2018
- Quantum Computing Market Research Report- Forecast 2022 | MRFR - August 1st, 2018
- Two Quantum Computing Bills Are Coming To Congress - July 5th, 2018
- Senate bills would make quantum computing a priority - June 10th, 2018
- What is quantum computing? - Definition from WhatIs.com - February 5th, 2018
- The Era of Quantum Computing Is Here. Outlook: Cloudy ... - January 26th, 2018
- IBM puts its quantum computer to work in relaxing, nerdy ASMR ... - January 8th, 2018
- Quantum computing is going to change the world. Here's what ... - January 8th, 2018
- Is Quantum Computing an Existential Threat to Blockchain ... - December 25th, 2017
- What is Quantum Computing? | SAP News Center - December 23rd, 2017
- Quantum Computing Explained | What is Quantum Computing? - December 21st, 2017
- New silicon structure opens the gate to quantum computers - December 14th, 2017
- Microsoft offers developers a preview of its quantum ... - December 12th, 2017
- Quantum Computing Is the Next Big Security Risk | WIRED - December 8th, 2017
- Yale Professors Race Google and IBM to the First Quantum ... - November 16th, 2017
- IBM's processor pushes quantum computing ... - engadget.com - November 16th, 2017
- Quantum computing - news.microsoft.com - November 1st, 2017
- Intel Takes First Steps To Universal Quantum Computing - October 13th, 2017
- Qudits: The Real Future of Quantum Computing? - IEEE Spectrum - October 13th, 2017
- quantum computing - engadget.com - October 13th, 2017
- Quantum Computing | Intel Newsroom - October 13th, 2017
- What will you actually use quantum computing for? | ZDNet - October 11th, 2017
- Here's what quantum computing is and why it matters - October 6th, 2017
- Microsoft just upped its multi-million bet on quantum computing - ZDNet - September 7th, 2017
- Microsoft's Aussie quantum computing lab set to scale up next-gen ... - ARNnet - September 7th, 2017
- Quantum computing event explores the implications for business - Cambridge Network - August 30th, 2017
- Quantum Computing Is Coming at Us Fast, So Here's Everything You Need to Know - ScienceAlert - August 27th, 2017