The sun looks immutable, a boring celestial lightbulb that’s always turned on. But this fusion-powered ball of plasma is in constant flux. Every 11 years or so, it swings between slumber and an active, unruly […]
Quantum 7, 1103 (2023). https://doi.org/10.22331/q-2023-09-07-1103 We show that the proof of the generalised quantum Stein’s lemma [Brandão & Plenio, Commun. Math. Phys. 295, 791 (2010)] is not correct due to a gap in the argument […]
Quantum 7, 1102 (2023). https://doi.org/10.22331/q-2023-09-07-1102 Integral representations of quantum relative entropy, and of the directional second and higher order derivatives of von Neumann entropy, are established, and used to give simple proofs of fundamental, known […]
Quantum 7, 1101 (2023). https://doi.org/10.22331/q-2023-09-07-1101 An orthogonal set of states in multipartite systems is called to be strong quantum nonlocality if it is locally irreducible under every bipartition of the subsystems [46]. In this work, […]
Quantum 7, 1100 (2023). https://doi.org/10.22331/q-2023-09-07-1100 The Zeno effect, in which repeated observation freezes the dynamics of a quantum system, stands as an iconic oddity of quantum mechanics. When a measurement is unable to distinguish between […]
The Chern number, an invariant quantity that characterizes topological phases in physical systems, was recently tuned in a controlled fashion by researchers from Tokyo Tech. They achieved this feat in an electronic-nuclear spin system, namely […]
For years, researchers have tried various ways to coax quantum bits—or qubits, the basic building blocks of quantum computers—to remain in their quantum state for ever-longer times, a key step in creating devices like quantum […]
Insider Brief Quantum Computing Inc.and Assured Cyber Protection Ltd signed an agreement to coordinate efforts to market and deliver both companies’ cybersecurity technologies and products. The companies say the products they offer are complementary and […]
Insider Brief DTXL5 – a 100 M€ deep tech venture capital fund – has invested €6.3 million in Delft Circuits Series A. Delft Circuits is a high-tech supplier in the emerging quantum industry. The investment […]
Insider Brief Honeywell (Nasdaq: HON) today announced that it is the first company to integrate quantum-computing-hardened encryption keys into smart utility meters. The company is using Quantinuum’s Quantum Origin technology to protect the meters. Quantum […]
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