Quantum 7, 1118 (2023). https://doi.org/10.22331/q-2023-09-25-1118 Superconducting quantum circuits are a promising hardware platform for realizing a fault-tolerant quantum computer. Accelerating progress in this field of research demands general approaches and computational tools to analyze and […]
Quantum 7, 1117 (2023). https://doi.org/10.22331/q-2023-09-21-1117 Sharing multi-partite quantum entanglement between parties allows for diverse secure communication tasks to be performed. Among them, conference key agreement (CKA) – an extension of key distribution to multiple parties […]
Quantum 7, 1116 (2023). https://doi.org/10.22331/q-2023-09-21-1116 We consider the combined effect of readout errors and coherent errors, i.e., deterministic phase rotations, on the surface code. We use a recently developed numerical approach, via a mapping of […]
Quantum 7, 1115 (2023). https://doi.org/10.22331/q-2023-09-15-1115 It is widely accepted that the dynamic of entanglement in presence of a generic circuit can be predicted by the knowledge of the statistical properties of the entanglement spectrum. We […]
Quantum 7, 1114 (2023). https://doi.org/10.22331/q-2023-09-15-1114 The device-independent paradigm has had spectacular successes in randomness generation, key distribution and self-testing, however most of these results have been obtained under the assumption that parties hold trusted and […]
Quantum 7, 1113 (2023). https://doi.org/10.22331/q-2023-09-14-1113 Although tensor networks are powerful tools for simulating low-dimensional quantum physics, tensor network algorithms are very computationally costly in higher spatial dimensions. We introduce $textit{quantum gauge networks}$: a different kind […]
Quantum 7, 1112 (2023). https://doi.org/10.22331/q-2023-09-14-1112 A recent paper by two of us and co-workers [1], based on an extended Wigner’s friend scenario, demonstrated that certain empirical correlations predicted by quantum theory (QT) violate inequalities derived […]
Quantum 7, 1111 (2023). https://doi.org/10.22331/q-2023-09-14-1111 Challenging combinatorial optimization problems are ubiquitous in science and engineering. Several quantum methods for optimization have recently been developed, in different settings including both exact and approximate solvers. Addressing this […]
Quantum 7, 1110 (2023). https://doi.org/10.22331/q-2023-09-11-1110 We present two quantum interior point methods for semidefinite optimization problems, building on recent advances in quantum linear system algorithms. The first scheme, more similar to a classical solution algorithm, […]
Quantum 7, 1109 (2023). https://doi.org/10.22331/q-2023-09-11-1109 In the lead up to fault tolerance, the utility of quantum computing will be determined by how adequately the effects of noise can be circumvented in quantum algorithms. Hybrid quantum-classical […]
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