Insider Brief The Trump administration is embracing quantum technology as a strategic tool for national security, infrastructure protection, and space exploration, despite tensions with scientific agencies. Federal leaders acknowledge the importance of international alliances, talent […]
A team of researchers has developed a new way to control light interactions using a specially engineered structure called a 3D photonic-crystal cavity that could enable transformative advancements in quantum computing, quantum communication and other […]
Quantum 9, 1718 (2025). https://doi.org/10.22331/q-2025-04-18-1718 We work out the general theory of one-parameter families of partial entanglement properties and the resulting entanglement depth-like quantities. Special cases of these are the depth of partitionability, the depth […]
Quantum 9, 1717 (2025). https://doi.org/10.22331/q-2025-04-18-1717 In unitary property testing a quantum algorithm, also known as a tester, is given query access to a black-box unitary and has to decide whether it satisfies some property. We […]
It started with a bet. In the late 1980s, at a conference in Lausanne, the mathematicians Noga Alon and Peter Sarnak got into a friendly debate. Both were studying collections of nodes and edges called […]
Quantum 9, 1716 (2025). https://doi.org/10.22331/q-2025-04-18-1716 $mathcal{PT}$-symmetric systems have garnered significant attention due to their unconventional properties. Despite the growing interest, there remains an ongoing debate about whether these systems outperform their Hermitian counterparts in practical […]
Quantum 9, 1715 (2025). https://doi.org/10.22331/q-2025-04-18-1715 We study the geodesics on the manifold of mixed quantum states for the Bures metric. It is shown that these geodesics correspond to physical non-Markovian evolutions of the system coupled […]
Quantum 9, 1714 (2025). https://doi.org/10.22331/q-2025-04-18-1714 We introduce an optimal strategy to sample quantum outcomes of local measurement strings for isometric tensor network states. Our method generates samples based on an exact cumulative bounding function, without […]
Quantum 9, 1713 (2025). https://doi.org/10.22331/q-2025-04-18-1713 We propose an interferometric scheme where each photon returns one bit of the binary expansion of an unknown phase. It sets up a method for estimating the phase value at […]
Quantum 9, 1712 (2025). https://doi.org/10.22331/q-2025-04-18-1712 Extended non-local games are a generalization of monogamy-of-entanglement games, played by two quantum parties and a quantum referee that performs a measurement on their local quantum system. Along the lines […]
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