Quantum 5, 391 (2021). https://doi.org/10.22331/q-2021-01-28-391 We propose an efficient method for simultaneously optimizing both the structure and parameter values of quantum circuits with only a small computational overhead. Shallow circuits that use structure optimization perform […]
Quantum 5, 390 (2021). https://doi.org/10.22331/q-2021-01-28-390 We discuss the notion of coherent states from three different perspectives: the seminal approach of Schrödinger, the experimental take of quantum optics, and the theoretical developments in quantum gravity. This […]
Quantum 5, 389 (2021). https://doi.org/10.22331/q-2021-01-28-389 Quantum nonlocal correlations are generated by implementation of local quantum measurements on spatially separated quantum subsystems. Depending on the underlying mathematical model, various notions of sets of quantum correlations can […]
Quantum 5, 388 (2021). https://doi.org/10.22331/q-2021-01-28-388 As the hardware technology for quantum computing advances, its possible applications are actively searched and developed. However, such applications still suffer from the noise on quantum devices, in particular when […]
Quantum 5, 387 (2021). https://doi.org/10.22331/q-2021-01-26-387 We introduce a new quantum Rényi divergence $D^{#}_{alpha}$ for $alpha in (1,infty)$ defined in terms of a convex optimization program. This divergence has several desirable computational and operational properties such […]
Quantum 5, 386 (2021). https://doi.org/10.22331/q-2021-01-25-386 Hybrid quantum-classical optimization algorithms represent one of the most promising application for near-term quantum computers. In these algorithms the goal is to optimize an observable quantity with respect to some […]
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