Quantum 9, 1886 (2025). https://doi.org/10.22331/q-2025-10-20-1886 We ask what is the general framework for a quantum error correcting code that is defined by a sequence of measurements. Recently, there has been much interest in Floquet codes […]
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Quantum 9, 1885 (2025). https://doi.org/10.22331/q-2025-10-16-1885 The conditional disclosure of secrets (CDS) primitive is among the simplest cryptographic settings in which to study the relationship between communication, randomness, and security. CDS involves two parties, Alice and […]
Quantum 9, 1884 (2025). https://doi.org/10.22331/q-2025-10-13-1884 We investigate quantum error correction protocols for neutral atoms quantum processors in the presence of atom loss. We complement the surface code with loss detection units (LDU) and analyze its […]
Quantum 9, 1883 (2025). https://doi.org/10.22331/q-2025-10-13-1883 In this work, we show that learning the output distributions of brickwork random quantum circuits is average-case hard in the statistical query model. This learning model is widely used as […]
Quantum 9, 1882 (2025). https://doi.org/10.22331/q-2025-10-13-1882 Despite its popularity, several empirical and theoretical studies suggest that the quantum approximate optimization algorithm (QAOA) has persistent issues in providing a substantial practical advantage. Numerical results for few qubits […]
Quantum 9, 1881 (2025). https://doi.org/10.22331/q-2025-10-13-1881 We propose efficient algorithms for classically simulating Gaussian unitaries and measurements applied to non-Gaussian initial states. The constructions are based on decomposing the non-Gaussian states into linear combinations of Gaussian […]
Quantum 9, 1880 (2025). https://doi.org/10.22331/q-2025-10-13-1880 It is commonly believed that failures of tomographic completeness undermine assessments of nonclassicality in noncontextuality experiments. In this work, we study how such failures can indeed lead to mistaken assessments […]
Quantum 9, 1879 (2025). https://doi.org/10.22331/q-2025-10-07-1879 Quantum error correction is a fundamental primitive of fault-tolerant quantum computing. But in order for error correction to proceed, one must first prepare the codespace of the underlying error-correcting code. […]
Quantum 9, 1878 (2025). https://doi.org/10.22331/q-2025-10-07-1878 Quantum coherence has been shown to impact the operational capabilities of quantum systems performing thermodynamic tasks in a significant way, and yet the possibility and conditions for genuine coherence-enhanced thermodynamic […]
Quantum 9, 1877 (2025). https://doi.org/10.22331/q-2025-10-06-1877 We study relaxations of entanglement-assisted quantum channel coding and establish that non-signaling assistance and a natural semi-definite programming relaxation — termed meta-converse — are equivalent in terms of success probabilities. […]
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