Quantum 7, 1000 (2023). https://doi.org/10.22331/q-2023-05-12-1000 Perturbation theory is an important technique for reducing computational cost and providing physical insights in simulating quantum systems with classical computers. Here, we provide a quantum algorithm to obtain perturbative […]
Seven years ago, Quantum Journal was still just an idea in the minds of a handful of enthusiasts, who believed that it was time to offer a new one way of recognizing and curating outstanding […]
Quantum 7, 999 (2023). https://doi.org/10.22331/q-2023-05-11-999 We prove concentration bounds for the following classes of quantum states: (i) output states of shallow quantum circuits, answering an open question from [16]; (ii) injective matrix product states; (iii) […]
Quantum 7, 998 (2023). https://doi.org/10.22331/q-2023-05-11-998 Measurements of quantum states form a key component in quantum-information processing. It is therefore an important task to compare measurements and furthermore decide if a measurement strategy is optimal. Entropic […]
Quantum 7, 997 (2023). https://doi.org/10.22331/q-2023-05-04-997 Most near-term quantum information processing devices will not be capable of implementing quantum error correction and the associated logical quantum gate set. Instead, quantum circuits will be implemented directly using […]
Quantum 7, 996 (2023). https://doi.org/10.22331/q-2023-05-04-996 We introduce Inflation, a Python library for assessing whether an observed probability distribution is compatible with a causal explanation. This is a central problem in both theoretical and applied sciences, […]
Quantum 7, 995 (2023). https://doi.org/10.22331/q-2023-05-04-995 Simulating large quantum systems is the ultimate goal of quantum computing. Variational quantum simulation (VQS) gives us a tool to achieve the goal in near-term devices by distributing the computation […]
Quantum 7, 994 (2023). https://doi.org/10.22331/q-2023-05-04-994 Rapidly improving gate fidelities for coherent operations mean that errors in state preparation and measurement (SPAM) may become a dominant source of error for fault-tolerant operation of quantum computers. This […]
Quantum 7, 993 (2023). https://doi.org/10.22331/q-2023-05-04-993 We consider the problem of the variational quantum circuit synthesis into a gate set consisting of the CNOT gate and arbitrary single-qubit (1q) gates with the primary target being the […]
Quantum 7, 992 (2023). https://doi.org/10.22331/q-2023-04-27-992 Since linear-optical two-photon gates are inherently probabilistic, measurement-based implementations are particularly well suited for photonic platforms: a large highly-entangled photonic resource state, called a graph state, is consumed through measurements […]
Recent Comments