Quantum 10, 1991 (2026). https://doi.org/10.22331/q-2026-01-29-1991 QMetro++ is a Python package that provides a set of tools for identifying optimal estimation protocols that maximize quantum Fisher information (QFI). Optimization can be performed for arbitrary configurations of […]
Quantum 10, 1990 (2026). https://doi.org/10.22331/q-2026-01-28-1990 We propose an efficient protocol to realize multi-qubit gates in arrays of neutral atoms. The atoms encode qubits in the long-lived hyperfine sublevels of the ground electronic state. To realize […]
Quantum 10, 1989 (2026). https://doi.org/10.22331/q-2026-01-28-1989 Mančinska and Roberson [FOCS’20] showed that two graphs are quantum isomorphic if and only if they admit the same number of homomorphisms from any planar graph. Atserias et al. [JCTB’19] […]
Quantum 10, 1988 (2026). https://doi.org/10.22331/q-2026-01-28-1988 Quantum memories are a crucial precondition in many protocols for processing quantum information. A fundamental problem that illustrates this statement is given by the task of channel discrimination, in which […]
Quantum 10, 1987 (2026). https://doi.org/10.22331/q-2026-01-27-1987 Nonlocal games are a foundational tool for understanding entanglement and constructing quantum protocols in settings with multiple spatially separated quantum devices. In this work, we continue the study initiated by […]
Quantum 10, 1986 (2026). https://doi.org/10.22331/q-2026-01-27-1986 We establish improved complexity estimates of quantum algorithms for linear dissipative ordinary differential equations (ODEs) and show that the time dependence can be fast-forwarded to be sub-linear. Specifically, we show […]
Quantum 10, 1985 (2026). https://doi.org/10.22331/q-2026-01-27-1985 When numerically simulating the unitary time evolution of an infinite-dimensional quantum system, one is usually led to treat the Hamiltonian $H$ as an “infinite-dimensional matrix” by expressing it in some […]
Quantum 10, 1984 (2026). https://doi.org/10.22331/q-2026-01-22-1984 Executing quantum algorithms over distributed quantum systems requires quantum circuits to be divided into sub-circuits which communicate via entanglement-based teleportation. Naively mapping circuits to qubits over multiple quantum processing units […]
Quantum 10, 1983 (2026). https://doi.org/10.22331/q-2026-01-22-1983 We study the properties of photons in a cryogenic cavity, made by cryo-cooled mirrors surrounded by a room temperature environment. We model such a system as a multimode cavity coupled […]
Quantum 10, 1982 (2026). https://doi.org/10.22331/q-2026-01-22-1982 Interplay between quantum interference and classical randomness can enhance performance of various quantum information tasks. In the present paper we analyze recurrence phenomena in the discrete-time quantum stochastic walk on […]
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