Quantum 7, 1214 (2023). https://doi.org/10.22331/q-2023-12-21-1214 Operator controllability refers to the ability to implement an arbitrary unitary in SU(N) and is a prerequisite for universal quantum computing. Controllability tests can be used in the design of […]
Quantum 7, 1213 (2023). https://doi.org/10.22331/q-2023-12-20-1213 With a focus on universal quantum computing for quantum simulation, and through the example of lattice gauge theories, we introduce rather general quantum algorithms that can efficiently simulate certain classes […]
A supercomputer scheduled to go online in April 2024 will rival the estimated rate of operations in the human brain, according to researchers in Australia. The machine, called DeepSouth, is capable of performing 228 trillion […]
Quantum 7, 1212 (2023). https://doi.org/10.22331/q-2023-12-20-1212 Graph states are versatile resources for various quantum information processing tasks, including measurement-based quantum computing and quantum repeaters. Although the type-II fusion gate enables all-optical generation of graph states by […]
Quantum 7, 1211 (2023). https://doi.org/10.22331/q-2023-12-20-1211 Many-particle quantum systems with intermediate anyonic exchange statistics are supported in one spatial dimension. In this context, the anyon-anyon mapping is recast as a continuous transformation that generates shifts of […]
Quantum 7, 1210 (2023). https://doi.org/10.22331/q-2023-12-20-1210 The widespread success of deep neural networks has revealed a surprise in classical machine learning: very complex models often generalize well while simultaneously overfitting training data. This phenomenon of benign […]
Quantum 7, 1209 (2023). https://doi.org/10.22331/q-2023-12-18-1209 We introduce a neural network-based approach for modeling wave functions that satisfy Bose-Einstein statistics. Applying this model to small $^4He_N$ clusters (with N ranging from 2 to 14 atoms), we […]
Quantum 7, 1208 (2023). https://doi.org/10.22331/q-2023-12-18-1208 We give a novel procedure for approximating general single-qubit unitaries from a finite universal gate set by reducing the problem to a novel magnitude approximation problem, achieving an immediate improvement […]
A tiny ball of brain cells hums with activity as it sits atop an array of electrodes. For two days, it receives a pattern of electrical zaps, each stimulation encoding the speech peculiarities of eight […]
Quantum 7, 1207 (2023). https://doi.org/10.22331/q-2023-12-14-1207 In quantum key distribution (QKD), protocols are tailored to adopt desirable experimental attributes, including high key rates, operation in high noise levels, and practical security considerations. The round-robin differential phase […]
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