Abstract:We provide a perspective into measuring the quantum information spreading by introducing N-operator correlators. Leveraging the idea from N-point correlation function from cosmology, we formulate a generalized Out-of-Time-Ordered Correlator (OTOC), called N-Operator Correlator (NOC). Such formulation can reduce the effect … Read more
Key takeaways: IBM Quantum Nighthawk r2 uses independent, high-speed qubit reset to execute 100,000+ circuits per second—up to 25x higher circuit throughput than IBM Quantum Heron. Active qubit reset lowers initialization error by around 25x while preserving Heron-class gate fidelity … Read more
Still, other scientists remain sceptical, given quantum effects are notoriously fragile and are easily disrupted by observation or interference. “Interactions with the environment can quickly degrade [quantum] effects, limiting both performance and scalability,” says Ferraro, which could offset part of … Read more
Last week, the US government announced $2 billion in investments in quantum computing companies, allocating $100 million each to a range of startups in exchange for equity in the companies. Those could be make-or-break investments for many companies that are … Read more
The advancing threat of cryptographically-relevant quantum computers has made it urgent to replace currently-deployed asymmetric cryptography primitives—key exchange (ECDH) and digital signatures (RSA, ECDSA, EdDSA)—which are vulnerable to Shor’s quantum algorithm. It does not, however, impact existing symmetric cryptography algorithms … Read more
For those of you who haven’t seen, there were actually two “bombshell” QC announcements this week. One, from Caltech, including friend-of-the-blog John Preskill, showed how to do quantum fault-tolerance with lower overhead than was previously known, by using high-rate codes, … Read more
In this post: why I expect the maximum achievable qubit quality to increase drastically in the next few years. In 2014, the John Martinis group at UCSB performed an experiment where they stored a classical bit using their quantum computer. … Read more
A research team from the Faculty of Physics and the Centre for Quantum Optical Technologies at the Centre of New Technologies, University of Warsaw has introduced a new way to measure hard-to-detect terahertz signals using a “quantum antenna.” In their … Read more
29 Jul 2025 3 min read Tereza Pultarova is a London-based journalist specializing in aerospace and defense technologies. Through this door is the world’s first maritime quantum dual gravimeter, part of Q-CTRL’s assured navigation solution for when GPS is unavailable … Read more
Hard problems are usually not a welcome sight. But cryptographers love them. That’s because certain hard math problems underpin the security of modern encryption. Any clever trick for solving them will doom most forms of cryptography. Several years ago, researchers … Read more