Quantum 9, 1612 (2025). https://doi.org/10.22331/q-2025-01-28-1612 We provide a systematic framework for constructing generic models of nonequilibrium quantum dynamics with a target stationary (mixed) state. Our framework identifies (almost) all combinations of Hamiltonian and dissipative dynamics […]
Quantum 9, 1611 (2025). https://doi.org/10.22331/q-2025-01-27-1611 The design of quantum protocols for secure key generation poses many challenges: On the one hand, they need to be practical concerning experimental realisations. On the other hand, their theoretical […]
Quantum 9, 1610 (2025). https://doi.org/10.22331/q-2025-01-27-1610 Group field theory posits that spacetime is emergent and is hence defined without any background notion of space or time; dynamical questions are formulated in relational terms, in particular using […]
Quantum 9, 1609 (2025). https://doi.org/10.22331/q-2025-01-27-1609 Two-dimensional color codes are a promising candidate for fault-tolerant quantum computing, as they have high encoding rates, transversal implementation of logical Clifford gates, and resource-efficient magic state preparation schemes. However, […]
Quantum 9, 1608 (2025). https://doi.org/10.22331/q-2025-01-27-1608 In the quest for robust and universal quantum devices, the notion of simulation plays a crucial role, both from a theoretical and from an applied perspective. In this work, we […]
Quantum 9, 1607 (2025). https://doi.org/10.22331/q-2025-01-23-1607 We investigate mixed states exhibiting nontrivial topological features, focusing on symmetry-protected topological (SPT) phases under various types of decoherence. Our findings demonstrate that these systems can retain topological information from […]
Quantum 9, 1606 (2025). https://doi.org/10.22331/q-2025-01-23-1606 Quantum learning tasks often leverage randomly sampled quantum circuits to characterize unknown systems. An efficient approach known as “circuit reusing,” where each circuit is executed multiple times, reduces the cost […]
Quantum 9, 1605 (2025). https://doi.org/10.22331/q-2025-01-21-1605 Entanglement-based quantum networks exhibit a unique flexibility in the choice of entangled resource states that are then locally manipulated by the nodes to fulfill any request in the network. Furthermore, […]
Quantum 9, 1604 (2025). https://doi.org/10.22331/q-2025-01-21-1604 A quantum position-verification scheme attempts to verify the spatial location of a prover. The prover is issued a challenge with quantum and classical inputs and must respond with appropriate timings. […]
Quantum 9, 1603 (2025). https://doi.org/10.22331/q-2025-01-21-1603 Quantum state purification is the task of recovering a nearly pure copy of an unknown pure quantum state using multiple noisy copies of the state. This basic task has applications […]
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