Quantum 9, 1649 (2025). https://doi.org/10.22331/q-2025-02-26-1649 The matrix rank and its positive versions are robust for small approximations, i.e. they do not decrease under small perturbations. In contrast, the multipartite tensor rank can collapse for arbitrarily […]
Quantum 9, 1648 (2025). https://doi.org/10.22331/q-2025-02-26-1648 We study Heisenberg scaling of quantum metrology in the viewpoint of population coding. Although Fisher information has been used for a figure of merit to characterize Heisenberg scaling in quantum […]
Quantum 9, 1647 (2025). https://doi.org/10.22331/q-2025-02-26-1647 In this paper we study single qutrit circuits consisting of words over the Clifford$+mathcal{D}$ cyclotomic gate set, where $mathcal{D}=text{diag}(pmxi^{a},pmxi^{b},pmxi^{c})$, $xi$ is a primitive $9$-th root of unity and $a,b,c$ are […]
A new study from the University of Eastern Finland (UEF) explores the behavior of photons, the elementary particles of light, as they encounter boundaries where material properties change rapidly over time. This research uncovers remarkable […]
Insider Brief: Turkcell and ID Quantique completed the world’s first terrestrial intercontinental quantum key distribution (QKD) over a fiber-optic link in Istanbul, demonstrating its potential for securing telecommunications networks. The trial connected the European and […]
Insider Brief Horizon Quantum Computing plans to go public through a merger with dMY Squared Technology Group in a deal valuing the company at approximately $500 million. The Singapore-based firm develops software tools to simplify […]
Insider Brief: ELTECH Consulting partners with Q-CTRL to expand quantum education and error correction tools in India, becoming an authorized re-seller of Black Opal and Fire Opal. Q-CTRL’s collaboration with Quantum AI Global previously integrated […]
Quantum 9, 1646 (2025). https://doi.org/10.22331/q-2025-02-26-1646 Quantum non-Markovianity in tripartite quantum states $rho_{ABC}$ represents a correlation between systems $A$ and $C$ when conditioned on the system $B$ and is known to have both classical and quantum […]
PhD and Postdoc Opportunities in Research on Quantum Algorithms for Quantum Chemistry Submitted by Lise Steen Nielsen on Wed, 26/02/2025 – 11:22. Application deadline: Tuesday, April 1, 2025 The Quantum for Life Center is looking […]
Insider Brief The U.S. quantum industry is pushing for the reauthorization of the National Quantum Initiative Act and the appointment of a “quantum czar” to coordinate federal efforts. Paul Stimers of the Quantum Industry Coalition […]
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