Quantum 9, 1880 (2025). https://doi.org/10.22331/q-2025-10-13-1880 It is commonly believed that failures of tomographic completeness undermine assessments of nonclassicality in noncontextuality experiments. In this work, we study how such failures can indeed lead to mistaken assessments […]
Quantum 9, 1879 (2025). https://doi.org/10.22331/q-2025-10-07-1879 Quantum error correction is a fundamental primitive of fault-tolerant quantum computing. But in order for error correction to proceed, one must first prepare the codespace of the underlying error-correcting code. […]
Quantum 9, 1878 (2025). https://doi.org/10.22331/q-2025-10-07-1878 Quantum coherence has been shown to impact the operational capabilities of quantum systems performing thermodynamic tasks in a significant way, and yet the possibility and conditions for genuine coherence-enhanced thermodynamic […]
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 […]
Quantum 9, 1874 (2025). https://doi.org/10.22331/q-2025-10-02-1874 We generalize the Levitov-Lesovik formula for the probability distribution function of the electron charge transferred through a phase coherent conductor, to include projective measurements that monitor the chiral propagation in […]
Quantum 9, 1873 (2025). https://doi.org/10.22331/q-2025-10-02-1873 The discovery of the backpropagation algorithm ranks among one of the most important moments in the history of machine learning, and has made possible the training of large-scale neural networks […]
Quantum 9, 1872 (2025). https://doi.org/10.22331/q-2025-10-01-1872 Quantum simulation of lattice gauge theories is an important avenue to gain insights into both particle physics phenomena and constrained quantum many-body dynamics. There is a growing interest in probing […]
Quantum 9, 1871 (2025). https://doi.org/10.22331/q-2025-10-01-1871 We extend the concept of operator charge in the context of an abelian $U(1)$ symmetry and apply this framework to symmetry-preserving matrix product operators (MPOs), enabling the description of operators […]
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