On Tue, Sep 30, 2025 at 2:09 PM John Clark <[email protected]> wrote:\
*By the way, IBM says they will have a 200 logical qubit fault tolerant quantum computer by 2029. They call it "Starling". And they say they will have one with a few thousand logical qubits capable of breaking 2048-bit RSA encryption (or bitcoin) in the early 2030s. Google also says they will have a quantum machine that can break 2048-bit RSA encryption in the "early 2030s". ** Google's timeline is roughly similar to IBM's, although they don't mention a specific year for a 200 qubit machine.* *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* Brent Meeker <[email protected]> wrote: >> * > Ironically it seems we'll get quantum computers to work at about the >> same time we realize they're not very useful.* >> > > *The quantum computer company Alice & Bob’s claims they are on track to > have by 2030 a fault tolerant quantum computer with 100 logical qubits. I > don't know if they will reach their goal but it doesn't seem to be beyond > the realm of possibility, and if they do it will change the world. Such a > machine could accurately simulate the ground state energy of moderately > complex molecules such as iron/sulfur clusters that are important in > biological enzymes. It could simulate small superconductors, magnetic > materials, and high-temperature catalysts. It could speed up data search > thanks to Grover's algorithm, and optimize logistics and scheduling > problems. * > > *One specific example is it could simulate nitrogenase, or at least the > active electrons in it that are important for bonding, and nitrogenase is > the enzyme that plants used to break the enormously strong triple bonds in > nitrogen molecules in the air so they can be used by biological organisms. > Plants are able to do that using very little energy, but nobody has a good > understanding of how they do it, so we have to use the Haber–Bosch process > which is so inefficient it uses about 2% of the human race's entire energy > budget, but without it hundreds of millions of people would starve to > death. It would be nice if we had something better. * > > *And of course such a machine would be very useful for cryptography. But > probably the most important things of all are things we currently don't > know anything about and will not until we have a large low fault quantum > computer that we can fool around with. * > > On 9/29/2025 6:20 AM, John Clark wrote: >> >> *There have been some important developments in the field of quantum >> computing during September, for example:* >> >> *A 3,000 quantum-bit system capable of continuous operation* >> <https://news.harvard.edu/gazette/story/2025/09/clearing-significant-hurdle-to-quantum-computing/> >> >> *In their paper from the September 15, 2025 issue of the journal Nature:* >> >> >> *Continuous operation of a coherent 3,000-qubit system >> <https://www.nature.com/articles/s41586-025-09596-6> * >> >> *The authors say: * >> >> *"Our results pave the way for realization of large-scale continuously >> operated atomic clocks, sensors, and fault-tolerant quantum computers. >> [...] We demonstrated the continuous operation with a 3,000-qubit system, >> but it's also clear that this approach will work for much larger numbers as >> well. [...] We're showing a way where you can insert new atoms as you >> naturally lose them without destroying the information that's already in >> the system."* >> >> *There is a second paper of interest published in Nature on September >> 10. * >> >> *Probing the Kitaev honeycomb model on a neutral-atom quantum computer* >> <https://www.nature.com/articles/s41586-025-09475-0> >> >> *Researchers found a way to configure atomic arrays so they simulate >> quantum magnets, this allows them to change the connectivity between >> quantum processors during computation. One of the authors of the paper said >> "We can literally reconfigure the atomic quantum computer while it's >> operating. Basically, the system becomes a living organism."* >> >> *And there is a third paper from Nature published on September 24, a team >> demonstrated a new method of quantum error correction:* >> >> *Low-overhead transversal fault tolerance for universal quantum >> computation <https://www.nature.com/articles/s41586-025-09543-5> * >> >> *The lead author said he thinks with this new method it should be >> possible to build a quantum computer that can execute billions of >> operations and continue running for days and "Realizing this dream is now >> in our direct sight for the first time, ever. One can really see a very >> direct path towards realizing it"* >> >> *In a fourth development the quantum computer company "Alice and Bob" >> announced a few days ago that they have produced superconducting "quantum >> cat "cubits that remain resistant to flip errors for more than an hour, the >> previous record was seven minutes. * >> >> *Alice & Bob Shares Preliminary Results Vastly Surpassing Previous >> Bit-Flip Time Record* >> <https://alice-bob.com/newsroom/alice-bob-surpasses-bit-flip-stability-record/> >> >> -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/CAJPayv0HeaUYJ7GuEDTg8KBYQzeKZrYwtA3JGHrEVtTchHNUcw%40mail.gmail.com.
