Quantum - the open journal for quantum science’s Post

Freshly published in Quantum: A refined Frauchiger–Renner paradox based on strong contextuality by Laurens Walleghem, Rui Soares Barbosa, Matthew F. Pusey, and Stefan Weigert https://lnkd.in/esFMaSkN

Paul Dirac wrote an equation that made quantum theory obey special relativity and accidentally predicted antimatter. credit : Ayus Cosmos

In the quantum eraser experiment, entanglement acts as a physical "ledger" that tracks which path a particle took. It doesn’t need a mind to read the ledger; it just needs the information to exist anywhere in the physical state of the system. Source: CopilotAI

Freshly published in Quantum: Phase Transitions and Noise Robustness of Quantum Graph States by Tatsuya Numajiri, Shion Yamashika, Tomonori Tanizawa, Ryosuke Yoshii, Yuki Takeuchi, and Shunji Tsuchiya https://lnkd.in/dJP3FPd3

Researchers at Stevens Institute figured out how to test whether a single atomic clock can experience two different times simultaneously -- a quantum superposition of aging faster and slower at once. They're calling it the "quantum twin paradox." The precision is finally there to probe where general relativity and quantum mechanics stop agreeing, and it turns out the tool that gets us there is just a really, really good clock.

New in Quantum: Polynomial time constructive decision algorithm for multivariable quantum signal processing by Yuki Ito, Hitomi Mori, Kazuki Sakamoto, and Keisuke Fujii https://lnkd.in/d-zHZEQV

Recently published in Quantum: Cost of quantum secret key by Karol Horodecki, Leonard Sikorski, Siddhartha Das, and Mark M. Wilde https://lnkd.in/ggPZ6td9

Bell’s Challenge: Quantum Theory Is Not the Final Word John Bell said: “I am quite convinced that the wave function is not everything… that the theory is not exact and will be replaced by something more complete.” Source: The Ghost in the Atom (1986, interviews with Bell) https://lnkd.in/ehgWkTHk Bell’s point was not that quantum theory fails. It works astonishingly well in many if not all respects. His concern was deeper: quantum mechanics predicts outcomes, but it does not clearly say what reality is doing between preparation, interaction, measurement, and record. For Bell, terms like “measurement” and “observer” were not explanations. They were signs that the theory was still resting on unclear foundations. So Bell’s challenge still stands: Quantum theory works — but it is certainly not the final description of reality.

Does it say much without saying much Anyway quantum conclusions or considerations remain a conundrum and a quandary to reconcile to

Quantum science's tendency to take common terms and then assign specific meanings to them that contrast with the common meanings may become my Roman Empire. Didn't you know that "microscopic" means "quantum-scale" and not just "a thing too small for human eyes?" Or that "tuning knobs" doesn't refer to actual, physical knobs but ways you can potentially control a qubit?