One of my main research directions in the last decade is quantum information theory and quantum computers. (See this post and this one.) It is therefore a pleasure to report and give many links on the massive efforts carried out these days in these directions and the great enthusiasm and hope these efforts carry.
Updates: I will try to update this post by adding new items at the end (and some important older items that I forgot to include). Update 1, April-May 2017, posted May 24, 2017. Update 2, June-July 2017, posted July 19; revised July 27, 2017.
Europe quantum flagship
An article in the Economist
An article in “Nature”
“Nature” article Quantum computers ready to leap out of the lab in 2017. It is mainly on Google, Microsoft, and Monroe’s lab mentioning also IBM, Rigetti and Quantum Circuits (a new startup by the Yale group). A little debate between John Martinis and Robert Schoelkopf about the target of “quantum supremacy.” Regarding topological quantum computing Leo Kouwenhoven declares that “2017 is the year of braiding,”
For the comment section: “Quantum computers” in various languages
How to say “Quantum computers” in other languages? Hebrew: מחשבים קוונטים pronounced: maghshevim kvantim; Spanish: Computadoras cuánticas (google translate).
Google/IBM/Microsoft and others: the race for building quantum computers.
The Race to Sell True Quantum Computers Begins Before They Really Exist, (Wired) Mainly on Google and IBM. IBM Inches Ahead of Google in Race for Quantum Computing Power, MIT Technology Review. Commercialize quantum technologies in five years (Nature)
IBM: IBM’s quantum cloud computer goes commercial (Nature) IBM moves from a 5-qubit quantum computer to 50-qubit commercial quantum computer in the near future. Also IBM’s first commercial quantum computer paves way to overhaul of molecular simulations (chemistry world); IBM Building First Universal Quantum Computers for Business and Science (IBM Press Release); and a PC World article.
Google: Researchers Report Milestone in Developing Quantum Computer (NYT); Quantum computing is poised to transform our lives. Meet the man leading Google’s charge (Wired, and interview with John Martinis)
Microsoft: Microsoft Makes Bet Quantum Computing Is Next Breakthrough (NYT) ; Inside Microsoft’s quest for a topological quantum computer (Nature) Microsoft doubles down on quantum computing bet. Microsoft approach is based on topological quantum computing.
Others: Scientists are close to building a quantum computer that can beat a conventional one, Science, Chris Monroe and the Startup ionQ, and various other groups and methods. Quantum Computing on Cusp, EE Times, Yale’s group and Quantum Circuits. Quantum hanky-panky (Seth Lloyd, Edge); Its much bigger than it looks ( ;
NIST: National Institute of Standards and Technology, quantum divisions. Super quantum simulator ‘entangles’ hundreds of ions (Science daily) Quantum computers may have higher ‘speed limits’ than thought (Phys.org.) A thought experiment by Stephen Jordan.
D-wave. D-wave is building large scale quantum computers with (rather noisy) superconducting qubits, and implement specific optimization algorithms. D-Wave quantum computers: The smart person’s guide . Quantum computer learns to ‘see’ trees Science Magazine. An article in Quanta Magazine.
The key for large scale universal quantum computers is quantum error-correcting codes.
IBM to develop hardware to wipe out errors in quantum computing (New Scientists)
Physicists show that real-time error correction in quantum … (Phys.Org, reporting on research in South Africa)
A convincing demonstration of computational complexity supremacy is expected by researchers in the near future. Main approaches are using quantum circuits with around 50 qubits or via demonstration of BosonSampling with 20-30 bosons.
( NextBigFuture. )
Revealed: Google’s plan for quantum computer supremacy (New Scientist); How Widely Should We Draw The Circle? (Scott Aaronson on imminent demonstration of quantum supremacy); News release from Bristol U. ; Proto quantum computer inspired by Victorians gets a speed boost About BosonSampling. (New Scientist.); Massive Disruption Is Coming With Quantum Computing, Singularity Hub
Topological quantum computing and anyons
Forging a Qubit to Rule Them All (Quanta Magazine); Inside the Knotty World of ‘Anyon’ Particles (Quanta Magazine); Why Insights of Nobel Physicists Could Revolutionize 21st-Century (Scientific Computing): Via Majorana fermions: Physicists In China Detect The Majorana Fermion (Asian Scientist Magazine); The discovery of Majorana fermion (EurekAlert);
Simulating physics with quantum computers
Quantum computer makes first high-energy physics simulation, Nature, about the Innsbruck group.
An article with emphasis on difficulties, bringing also my point of view.
A general article: The trouble with quantum computing by Ben Skuse, Engineering and Technology. The author expresses overall an optimistic bottom line, but explains the difficulties and also brings my point of view.
Here is the ending paragraph:
Much like outcomes in the quantum world itself, the future of quantum computing involves a number of unknowns, none of which we can predict. When and whether quantum supremacy and universal quantum computers can be achieved is currently up in the air, but the work of Chow, Lucas, Montanaro and even Kalai is contributing to tilting the odds in its favour. And each ‘step closer’ is only that. The road to quantum computing stretches off into the distance and may have no end.
Post quantum cryptography
Quantum computers will allow breaking most of current cryptosystems. This leads to much effort for “post-quantum cryptography,” namely developing cryptographic methods immune to quantum attacks.
Post-Quantum Cryptography: NIST’s Plan for the Future (U.S. National Institute of Standards and Technology (NIST)) NIST requests ideas for crypto that can survive quantum computers (The Register)
Quantum key distribution (QKD)
EXCLUSIVE – Mathematically provable communication security and other applications of Quantum Key Distribution (OpenGovAsia); Developing a quantum key system to make mobile transactions safer (New Atlas); China’s 2000-km Quantum Link Is Almost Complete (IEEE Spectrum); SK Telecom, Nokia team on quantum cryptography (Telecom Asia); Chinese Physicists Achieve Record-Breaking Quantum Cryptography Breakthrough (Hecked).
Related quantum science and technology
Atomic clocks: Physicists Find That as Clocks Get More Precise, Time Gets More, ScienceAlert; JILA atomic clock mimics long-sought synthetic magnetic state; Time crystals: Time Crystals Are Real, But That Doesn’t Mean Time Is Crystallized (Forbes); Entanglement and theoretical physics: The quantum source of space-time (Nature); The equation that could transform physics: Researchers say ER=EPR … (Daily mail). Quantum biology: Can Quantum Physics Explain Consciousness? (The Atlantic) Are we ready for quantum biology?, New Scientist; A New Spin on the Quantum Brain, Quanta Magazine; quantum effects in biological systems (a conference at IIAS).
Metaculus: When will the first 49+ qubit universal quantum computer be constructed? Posted March 2017, 42 predictions, median answer February 19, 2020.
Other players, U.S. China, Russia, U. K., France, Japan, Australia, Canada, Austria, Switzerland, Germany, Netherlands, Sweden, Denmark, Italy, Spain, Poland, Israel, Brazil, Korea, Finland, … and further links.
U.S. report : ADVANCING QUANTUM INFORMATION SCIENCE: NATIONAL CHALLENGES AND OPPORTUNITIES
Europe’s leap into the quantum computing arms race (Financial Times)
U.K. The future is quantum: solution to the world’s critical problems; Quantum computers will solve problems that conventional computers never could. (Financial times)
China: Chinese satellite is one giant step for the quantum internet (Nature); 5 reasons why China will rule tech, 2017 edition (computerworld. quantum computers is one of the items). China’s push to become a tech superpower triggers alarms abroad (Financial times, quantum computing emphasized ); China can help drive global progress in quantum computing (ZD net)
Singapore: CEO conversations: Quantum computing, leadership, and … (Enterprise Innovation).
Australia: Sydney University’s David Reilly part of Microsoft’s billion-dollar push, The Sydney Morning Heral; Quantum computing is the next space race says Telstras Hugh Bradlow (Financial Review, Australia).
Israel: The future is here: the quantum computer revolution (in Hebrew); Calcalist article (Hebrew); Israeli scientists discovery towards QC (in Hebrew Haaretz) ; Quantum computing breakthrough: Israeli scientists invent cannon for entangled photon clusters (International Business Times).
Update 1: April/May 2017.
IBM moves from 5 to 17 qubits; Five-Bosons Five-modes BosonSampling experiments; Similations; Cooling: Commonwealth Bank; and quantum thermodynamics.
Links to further items (mainly from the media) on quantum technology: April May 2017
Supercomputer Simulation Offers Peek at the Future of Quantum Computers. MIT Technology review.
Quantum computing the new frontier for banking (Australia) “Commonwealth Bank’s announcement that it has developed a quantum computer simulator takes the bank a step closer to its ambition of building a small, 10-qubit (quantum bits) machine by 2020.”
Finland: Refrigerator for quantum computers discovered Aalto University (EurekAlert), Nanofridge could keep quantum computers cool enough to calculate New Scientist. China: World’s First Quantum Computer Is Here (Wall street Pit) China Has Built The World’s 1st Quantum Computer, And It’s 24000 (India Times)
Google’s New Chip Is a Stepping Stone to Quantum Computing (MIT Technology Review)
Artificial Intelligence (AI) and Quantum Computing (Nanalyze) (Various cool stuff) Is Bitcoin at Risk as Google and IBM Aim for 50-Qubit Quantum … (Nigeria Today)
China team achieve 5-bosons 5-modes BosonSampling. High-efficiency multiphoton boson sampling : (Nature photonics); Blogpost on the Shtetl. However, UK team indicates over 50 photons needed for Boson Sampling quantum supremacy. (The next Big Future).
IBM: Moving from 5 qubits to 16/17 qubits: IBM reveals prototype of its first commercial quantum computer processor (New Atlas); IBM makes a leap in quantum computing power; IBM’s quantum computer gets powerful upgrade (Reuters); and ComputerWord New Zealand; The Inquirer; IBM: Αποκαλυπτήρια πρωτότυπου κβαντικού επεξεργαστή για εμπορική χρήση; MIT Technology Review;
Update 2: June/July 2017: Google move to 20 qubits and promises quantum supremacy by the end of 2017. A race between superconducting and ion-trapped technologies for Supremacy. U.S.-Russia Harvard-based 51 qubits cold-atom computer. Photons teleported into space.
More: Atos, IonQ, and Majorana Fermions.
(Sources: Google search, articles on quanta magazine, Facebook posts/ and blogposts by QI/QC groups, John Preskill, Sabine Hossenfelder , Scott Aaronson and others.)
General: Quantum Computing Might Be Here Sooner Than You Think, Bloomberg; Scientific American;
The race between ion trapped and superconducting for “supremacy”: Split decision in first-ever quantum computer faceoff (Science) Quantum computers compete for “supremacy” (Scientific American)
Google: Google on track for quantum computer breakthrough by end of 2017 (New Scientist) Big Think ; Daily mail ;
Topological: New method could enable more stable and scalable quantum computing, physicists report Phys. Org; Purdue joins Microsoft in five-year mission to create topological quantum computer. Yahoo News
Cold atoms quantum computer
51 qubits via cold atoms: World’s Most Advanced Quantum Computer Created By A Team Of US And Russian Scientists (Fossbytes). The arxived paper.
IonQ plans to bring a general-purpose quantum computer to the market by the end of 2018. IonQ Raises $20M Series B Round Led By NEA, GV To Advance Quantum Computing For Commercial Applications ; Venture Firms Back Startup with Novel Twist on Quantum Computing (Wall Street Journal).
The European large company Atos joins the quantum race. Atos Launches 40-Qubit Quantum Computing Simulator;
A Science article; Media coverage: Physicists Just Generated a Particle That Acts as Its Own Antiparticle (Science Alert); Latest Quantum Breakthrough: Majorana Fermions Discovered
Teleportation: Teleportation: Photon particles today, humans tomorrow? (BBC, the article is quite reasonable.) (Time )
The recent doubts regarding LIGO are not related to quantum computers but are related to correlated noise which is also an issue for quantum computers. Was It All Just Noise? Independent Analysis Casts Doubt On LIGO’s Detections, Forbes. A very nice post by Sabine Hossenfelder; Strange Noise in Gravitational-Wave Data Sparks Debate. Quanta Magazine;
A skeptical look: Delivering on a quantum promise by Karl Svozil physicsword.com. Svozil writes “While many of the quantum manifesto’s short- and medium-term goals appear feasible, some of the long-term goals might not be achievable even in principle.”
This is quite the opposite to my own skeptical view which is that some crucial short-term goals, primarily creating the necessary quantum error correcting codes, are infeasible. (The tragedy of skepticism – skeptics rarely agree with each other, are skeptical to views of other skeptics and also to their own views.)
Quantum machine learning: A Hybrid of Quantum Computing and Machine Learning Is Spawning New Ventures, IEEE Spectrum (Scot Aaronson is skeptical.)
Optical (classical) computers: Light-Powered Computers Brighten AI’s Future Scientific American
Harry Buhrman and Yfke Dulek give ‘Paradiso lecture’ on artificial intelligence and quantum computers CWI (I met Harry at “IlanFest)
Blind and private quantum computers: Private quantum computation: an introduction to blind quantum computing and related protocols, Joe Fitzsimons, Nature
After 2000 years, a Jewish quantum computer? : Jewish news: Cutting-edge tech brings super-secure quantum Israel a step closer