Twenty-seven years before Steve Jobs unveiled a computer you could put in your pocket, physicist Paul Benioff published a paper showing it was theoretically possible to build a much more powerful system you could hide in a thimble a quantum computer.
Named for the subatomic physics it aimed to harness, the concept Benioff described in 1980 still fuels research today, including efforts to build the next big thing in computing: a system that could make a PC look in some ways quaint as an abacus.
Richard Feynman a Nobel Prize winner whose wit-laced lectures brought physics to a broad audience helped establish the field, sketching out how such systems could simulate quirky quantum phenomena more efficiently than traditional computers. So,
Quantum computing is a sophisticated approach to making parallel calculations, using the physics that governs subatomic particles to replace the more simplistic transistors in todays computers.
Quantum computers calculate using qubits, computing units that can be on, off or any value between, instead of the bits in traditional computers that are either on or off, one or zero. The qubits ability to live in the in-between state called superposition adds a powerful capability to the computing equation, making quantum computers superior for some kinds of math.
Using qubits, quantum computers could buzz through calculations that would take classical computers a loooong time if they could even finish them.
For example, todays computers use eight bits to represent any number between 0 and 255. Thanks to features like superposition, a quantum computer can use eight qubits to represent every number between 0 and 255, simultaneously.
Its a feature like parallelism in computing: All possibilities are computed at once rather than sequentially, providing tremendous speedups.
So, while a classical computer steps through long division calculations one at a time to factor a humongous number, a quantum computer can get the answer in a single step. Boom!
That means quantum computers could reshape whole fields, like cryptography, that are based on factoring what are today impossibly large numbers.
That could be just the start. Some experts believe quantum computers will bust through limits that now hinder simulations in chemistry, materials science and anything involving worlds built on the nano-sized bricks of quantum mechanics.
Quantum computers could even extend the life of semiconductors by helping engineers create more refined simulations of the quantum effects theyre starting to find in todays smallest transistors.
Indeed, experts say quantum computers ultimately wont replace classical computers, theyll complement them. And some predict quantum computers will be used as accelerators much as GPUs accelerate todays computers.
Dont expect to build your own quantum computer like a DIY PC with parts scavenged from discount bins at the local electronics shop.
The handful of systems operating today typically require refrigeration that creates working environments just north of absolute zero. They need that computing arctic to handle the fragile quantum states that power these systems.
In a sign of how hard constructing a quantum computer can be, one prototype suspends an atom between two lasers to create a qubit. Try that in your home workshop!
Quantum computing takes nano-Herculean muscles to create something called entanglement. Thats when two or more qubits exist in a single quantum state, a condition sometimes measured by electromagnetic waves just a millimeter wide.
Crank up that wave with a hair too much energy and you lose entanglement or superposition, or both. The result is a noisy state called decoherence, the equivalent in quantum computing of the blue screen of death.
A handful of companies such as Alibaba, Google, Honeywell, IBM, IonQ and Xanadu operate early versions of quantum computers today.
Today they provide tens of qubits. But qubits can be noisy, making them sometimes unreliable. To tackle real-world problems reliably, systems need tens or hundreds of thousands of qubits.
Experts believe it could be a couple decades before we get to a high-fidelity era when quantum computers are truly useful.
Predictions of when we reach so-called quantum computing supremacy the time when quantum computers execute tasks classical ones cant is a matter of lively debate in the industry.
The good news is the world of AI and machine learning put a spotlight on accelerators like GPUs, which can perform many of the types of operations quantum computers would calculate with qubits.
So, classical computers are already finding ways to host quantum simulations with GPUs today. For example, NVIDIA ran a leading-edge quantum simulation on Selene, our in-house AI supercomputer.
NVIDIA announced in the GTC keynote the cuQuantum SDK to speed quantum circuit simulations running on GPUs. Early work suggests cuQuantum will be able to deliver orders of magnitude speedups.
The SDK takes an agnostic approach, providing a choice of tools users can pick to best fit their approach. For example, the state vector method provides high-fidelity results, but its memory requirements grow exponentially with the number of qubits.
That creates a practical limit of roughly 50 qubits on todays largest classical supercomputers. Nevertheless weve seen great results (below) using cuQuantum to accelerate quantum circuit simulations that use this method.
Researchers from the Jlich Supercomputing Centre will provide a deep dive on their work with the state vector method in session E31941 at GTC (free with registration).
A newer approach, tensor network simulations, use less memory and more computation to perform similar work.
Using this method, NVIDIA and Caltech accelerated a state-of-the-art quantum circuit simulator with cuQuantum running on NVIDIA A100 Tensor Core GPUs. It generated a sample from a full-circuit simulation of the Google Sycamore circuit in 9.3 minutes on Selene, a task that 18 months ago experts thought would take days using millions of CPU cores.
Using the Cotengra/Quimb packages, NVIDIAs newly announced cuQuantum SDK, and the Selene supercomputer, weve generated a sample of the Sycamore quantum circuit at depth m=20 in record time less than 10 minutes, said Johnnie Gray, a research scientist at Caltech.
This sets the benchmark for quantum circuit simulation performance and will help advance the field of quantum computing by improving our ability to verify the behavior of quantum circuits, said Garnet Chan, a chemistry professor at Caltech whose lab hosted the work.
NVIDIA expects the performance gains and ease of use of cuQuantum will make it a foundational element in every quantum computing framework and simulator at the cutting edge of this research.
Sign up to show early interest in cuQuantum.
Learn more about quantum computing on the NVIDIA Technical Blog.
Originally posted here:
What Is Quantum Computing? | NVIDIA Blog
- The Quantum Computer Revolution Is Closer Than You May Think - National Review - May 3rd, 2017 [May 3rd, 2017]
- Time Crystals Could be the Key to the First Quantum Computer - TrendinTech - May 3rd, 2017 [May 3rd, 2017]
- quantum computing - WIRED UK - May 3rd, 2017 [May 3rd, 2017]
- Chinese scientists build world's first quantum computing machine - India Today - May 3rd, 2017 [May 3rd, 2017]
- Here's How We Can Achieve Mass-Produced Quantum Computers - ScienceAlert - June 6th, 2017 [June 6th, 2017]
- D-Wave partners with U of T to move quantum computing along - Financial Post - June 6th, 2017 [June 6th, 2017]
- Team develops first blockchain that can't be hacked by quantum computer - Siliconrepublic.com - June 6th, 2017 [June 6th, 2017]
- Telstra just wants a quantum computer to offer as-a-service - ZDNet - June 6th, 2017 [June 6th, 2017]
- Research collaborative pursues advanced quantum computing - Phys.Org - June 6th, 2017 [June 6th, 2017]
- Quantum Computing Market Forecast 2017-2022 | Market ... - June 6th, 2017 [June 6th, 2017]
- Quantum Computing Is Real, and D-Wave Just Open ... - WIRED - June 7th, 2017 [June 7th, 2017]
- FinDEVr London: Preparing for the Dark Side of Quantum Computing - GlobeNewswire (press release) - June 9th, 2017 [June 9th, 2017]
- Purdue, Microsoft to Collaborate on Quantum Computer - Photonics.com - June 9th, 2017 [June 9th, 2017]
- Scientists May Have Found a Way to Combat Quantum Computer Blockchain Hacking - Futurism - June 9th, 2017 [June 9th, 2017]
- Microsoft and Purdue work on scalable topological quantum computer - Next Big Future - June 12th, 2017 [June 12th, 2017]
- HYPRES Expands Efforts in Quantum Computing with Launch of European Subsidiary SeeQC - Business Wire (press release) - June 12th, 2017 [June 12th, 2017]
- From the Abacus to Supercomputers to Quantum Computers - Duke Today - June 13th, 2017 [June 13th, 2017]
- Accenture, Biogen, 1QBit Launch Quantum Computing App to ... - HIT Consultant - June 14th, 2017 [June 14th, 2017]
- The US and China "Quantum Computing Arms Race" Will Change Long-Held Dynamics in Commerce, Intelligence ... - PR Newswire (press release) - June 14th, 2017 [June 14th, 2017]
- Quantum Computing Technologies markets will reach $10.7 billion by 2024 - PR Newswire (press release) - June 14th, 2017 [June 14th, 2017]
- A Hybrid of Quantum Computing and Machine Learning Is Spawning New Ventures - IEEE Spectrum - June 14th, 2017 [June 14th, 2017]
- KPN CISO details Quantum computing attack dangers - Mobile World Live - June 16th, 2017 [June 16th, 2017]
- Get ahead in quantum computing AND attract Goldman Sachs - eFinancialCareers - June 16th, 2017 [June 16th, 2017]
- Accenture, 1QBit partner for drug discovery through quantum ... - ZDNet - June 16th, 2017 [June 16th, 2017]
- Toward optical quantum computing - MIT News - June 17th, 2017 [June 17th, 2017]
- Quantum computing, the machines of tomorrow | The Japan Times - The Japan Times - June 17th, 2017 [June 17th, 2017]
- Its time to decide how quantum computing will help your ... - June 18th, 2017 [June 18th, 2017]
- Israel Enters Quantum Computer Race, Placing Encryption at Ever-Greater Risk - Sputnik International - June 20th, 2017 [June 20th, 2017]
- Prototype device enables photon-photon interactions at room ... - Phys.Org - June 20th, 2017 [June 20th, 2017]
- Dow and 1QBit Announce Collaboration Agreement on Quantum Computing - Business Wire (press release) - June 21st, 2017 [June 21st, 2017]
- Imperfect crystals may be perfect storage method for quantum computing - Digital Trends - June 21st, 2017 [June 21st, 2017]
- Dow Chemical, 1QBit Ink Quantum Computing Development Deal - Zacks.com - June 22nd, 2017 [June 22nd, 2017]
- Google on track for quantum computer breakthrough by end of 2017 - New Scientist - June 22nd, 2017 [June 22nd, 2017]
- USC to lead project to build super-speedy quantum computers - USC News - June 24th, 2017 [June 24th, 2017]
- The Quantum Computer Factory That's Taking on Google and IBM ... - WIRED - June 24th, 2017 [June 24th, 2017]
- The weird science of quantum computing, communications and encryption - C4ISR & Networks - June 27th, 2017 [June 27th, 2017]
- Multi-coloured photons in 100 dimensions may make quantum ... - Cosmos - June 30th, 2017 [June 30th, 2017]
- Global Quantum Computing Market Growth at a CAGR of 35.12 ... - PR Newswire (press release) - June 30th, 2017 [June 30th, 2017]
- Qudits: The Real Future of Quantum Computing? - IEEE Spectrum - IEEE Spectrum - June 30th, 2017 [June 30th, 2017]
- New method could enable more stable and scalable quantum ... - Phys.Org - June 30th, 2017 [June 30th, 2017]
- Quantum computers are about to get real | Science News - Science News Magazine - June 30th, 2017 [June 30th, 2017]
- Quantum Computing - Scientific American - June 30th, 2017 [June 30th, 2017]
- Australia's ambitious plan to win the quantum race - ZDNet - July 3rd, 2017 [July 3rd, 2017]
- How quantum mechanics can change computing - The Conversation - The Conversation US - August 24th, 2017 [August 24th, 2017]
- UNSW joins with government and business to keep quantum computing technology in Australia - The Australian Financial Review - August 24th, 2017 [August 24th, 2017]
- UNSW launches Australia's first hardware quantum computing company with investments from federal and NSW ... - OpenGov Asia - August 24th, 2017 [August 24th, 2017]
- Finns chill out quantum computers with qubit refrigerator to cut out errors - ZDNet - August 24th, 2017 [August 24th, 2017]
- Hype and cash are muddying public understanding of quantum ... - The Conversation AU - August 24th, 2017 [August 24th, 2017]
- IEEE Approves Standards Project for Quantum Computing ... - insideHPC - August 24th, 2017 [August 24th, 2017]
- Silicon Quantum Computing launched to commercialise UNSW ... - ZDNet - August 24th, 2017 [August 24th, 2017]
- The Era of Quantum Computing Is Here. Outlook: Cloudy ... - January 30th, 2018 [January 30th, 2018]
- The Era of Quantum Computing Is Here. Outlook: Cloudy | WIRED - February 6th, 2018 [February 6th, 2018]
- Quantum computing in the NISQ era and beyond - February 6th, 2018 [February 6th, 2018]
- What is quantum computing? - Definition from WhatIs.com - February 6th, 2018 [February 6th, 2018]
- Quantum computers - WIRED UK - February 19th, 2018 [February 19th, 2018]
- Is Quantum Computing an Existential Threat to Blockchain ... - February 21st, 2018 [February 21st, 2018]
- What is Quantum Computing? Webopedia Definition - March 25th, 2018 [March 25th, 2018]
- Quantum Computing Explained - WIRED UK - April 15th, 2018 [April 15th, 2018]
- Quantum computing: A simple introduction - Explain that Stuff - June 2nd, 2018 [June 2nd, 2018]
- What are quantum computers and how do they work? WIRED ... - June 22nd, 2018 [June 22nd, 2018]
- How Quantum Computers Work - July 22nd, 2018 [July 22nd, 2018]
- The reality of quantum computing could be just three years ... - September 12th, 2018 [September 12th, 2018]
- The 3 Types of Quantum Computers and Their Applications - November 24th, 2018 [November 24th, 2018]
- Quantum Computing - VLAB - January 27th, 2019 [January 27th, 2019]
- Quantum Computing | Centre for Quantum Computation and ... - January 27th, 2019 [January 27th, 2019]
- Microsofts quantum computing network takes a giant leap ... - March 7th, 2019 [March 7th, 2019]
- IBM hits quantum computing milestone, may see 'Quantum ... - March 7th, 2019 [March 7th, 2019]
- Quantum technology - Wikipedia - March 13th, 2019 [March 13th, 2019]
- Quantum Computing | D-Wave Systems - April 18th, 2019 [April 18th, 2019]
- Microsoft will open-source parts of Q#, the programming ... - May 7th, 2019 [May 7th, 2019]
- What Is Quantum Computing? The Complete WIRED Guide | WIRED - May 8th, 2019 [May 8th, 2019]
- The five pillars of Edge Computing -- and what is Edge computing anyway? - Information Age - October 1st, 2019 [October 1st, 2019]
- Moore's Law Is Dying. This Brain-Inspired Analogue Chip Is a Glimpse of What's Next - Singularity Hub - October 1st, 2019 [October 1st, 2019]
- Experts Gather at Fermilab for International Workshop on Cryogenic Electronics for Quantum Systems - Quantaneo, the Quantum Computing Source - October 1st, 2019 [October 1st, 2019]
- Princeton announces initiative to propel innovations in quantum science and technology - Princeton University - October 1st, 2019 [October 1st, 2019]
- Detecting Environmental 'Noise' That Can Damage The Quantum State of Qubits - In Compliance - October 1st, 2019 [October 1st, 2019]
- Quantum Computing beginning talks with clients on its quantum asset allocation application - Proactive Investors USA & Canada - October 1st, 2019 [October 1st, 2019]
- What is quantum computing? The next era of computational evolution, explained - Digital Trends - October 1st, 2019 [October 1st, 2019]
- IT sees the Emergence of Quantum Computing as a Looming Threat to Keeping Valuable Information Confidential - Quantaneo, the Quantum Computing Source - October 23rd, 2019 [October 23rd, 2019]
- More wrong answers get quantum computers to find the right one - Futurity: Research News - October 23rd, 2019 [October 23rd, 2019]