Quantum 5, 395 (2021). https://doi.org/10.22331/q-2021-02-11-395 Path integral quantum Monte Carlo (PIMC) is a method for estimating thermal equilibrium properties of stoquastic quantum spin systems by sampling from a classical Gibbs distribution using Markov chain Monte […]
Quantum 5, 394 (2021). https://doi.org/10.22331/q-2021-02-08-394 We gather and examine in detail gate decomposition techniques for continuous-variable quantum computers and also introduce some new techniques which expand on these methods. Both exact and approximate decomposition methods […]
Quantum 5, 393 (2021). https://doi.org/10.22331/q-2021-02-04-393 Gauge theories establish the standard model of particle physics, and lattice gauge theory (LGT) calculations employing Markov Chain Monte Carlo (MCMC) methods have been pivotal in our understanding of fundamental […]
Quantum 5, 392 (2021). https://doi.org/10.22331/q-2021-02-04-392 Photonics is the platform of choice to build a modular, easy-to-network quantum computer operating at room temperature. However, no concrete architecture has been presented so far that exploits both the […]
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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