Quantum 9, 1616 (2025). https://doi.org/10.22331/q-2025-01-30-1616 The Page-Wootters formalism is a proposal for reconciling the background-dependent, quantum-mechanical notion of time with the background independence of general relativity. However, the physical meaning of this framework remains debated. […]
Quantum 9, 1615 (2025). https://doi.org/10.22331/q-2025-01-30-1615 Dual-unitary quantum circuits have recently attracted attention as an analytically tractable model of many-body quantum dynamics. Consisting of a 1+1D lattice of 2-qudit gates arranged in a ‘brickwork’ pattern, these […]
Quantum 9, 1614 (2025). https://doi.org/10.22331/q-2025-01-28-1614 Considering a general microscopic model for a quantum measuring apparatus comprising a quantum probe coupled to a thermal bath, we analyze the energetic resources necessary for the realization of a […]
Quantum 9, 1613 (2025). https://doi.org/10.22331/q-2025-01-28-1613 Connecting multiple processors via quantum interconnect technologies could help overcome scalability issues in single-processor quantum computers. Transmission via these interconnects can be performed more efficiently using quantum multiplexing, where information […]
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 […]
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