Typically, the charge of electrons is used to store and process information in electronics-based devices. In spintronics, the focus is instead on the magnetic moment or on magnetic vortices, so-called skyrmions—the goal is smaller, faster, […]
An international team of researchers from Forschungszentrum Jülich (Germany), Tohoku University (Japan), and École Polytechnique de Montréal (Canada) has made a significant discovery in semiconductor science by revealing the remarkable spin-related material properties of Germanium-Tin […]
Engineers at Northwestern University have developed a new strategy that makes quantum light sources more consistent and reliable. The team coated an atomically thin semiconductor with a sheetlike organic molecule, which boosted the spectral purity […]
The amplituhedron is a geometric shape with an almost mystical quality: Compute its volume, and you get the answer to a central calculation in physics about how particles interact. Now, a young mathematician at Cornell […]
Quantum Computing Inc. (“QCi”) (Nasdaq: QUBT) has announced a $750 million oversubscribed private placement of common stock, which brings the total capital raised since November 2024 to $1.64 billion. The offering was led by several […]
Researchers have created a chip-based device that can split phonons—tiny packets of mechanical vibration that can carry information in quantum systems. By filling a key gap, this device could help connect various quantum devices via […]
Quantum 9, 1877 (2025). https://doi.org/10.22331/q-2025-10-06-1877 We study relaxations of entanglement-assisted quantum channel coding and establish that non-signaling assistance and a natural semi-definite programming relaxation — termed meta-converse — are equivalent in terms of success probabilities. […]
Quantum 9, 1876 (2025). https://doi.org/10.22331/q-2025-10-06-1876 We apply the recent graphical framework of “Quantum Lego” to XP stabilizer codes where the stabilizer group is generally non-Abelian. We show that the idea of operator matching continues to […]
Quantum 9, 1875 (2025). https://doi.org/10.22331/q-2025-10-06-1875 We explore indefinite causal order between events in the context of quasiclassical spacetimes in superposition. We introduce several new quantifiers to measure the degree of indefiniteness of the causal order […]
Scientists may have finally uncovered the mystery behind ultra-high-energy cosmic rays — the most powerful particles known in the universe. A team from NTNU suggests that colossal winds from supermassive black holes could be accelerating […]
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