Quantum 8, 1576 (2024). https://doi.org/10.22331/q-2024-12-23-1576 Understanding the influence of measurements on the properties of many-body systems is a fundamental problem in quantum mechanics and for quantum technologies. This paper explores how a finite density of […]
Quantum 8, 1575 (2024). https://doi.org/10.22331/q-2024-12-23-1575 Quantum Key Distribution (QKD) enables secret key exchange between two remote parties with information-theoretic security rooted in the laws of quantum physics. Encoding key information in continuous variables (CV), such […]
Quantum 8, 1574 (2024). https://doi.org/10.22331/q-2024-12-23-1574 Photon loss represents a major challenge for the implementation of quantum communication protocols with untrusted devices, e.g. in the device-independent (DI) or semi-DI approaches. Determining critical loss thresholds is usually […]
Quantum 8, 1573 (2024). https://doi.org/10.22331/q-2024-12-18-1573 We introduce Port-Based State Preparation (PBSP), a teleportation task where Alice holds a complete classical description of the target state and Bob’s correction operations are restricted to only tracing out […]
Quantum 8, 1572 (2024). https://doi.org/10.22331/q-2024-12-18-1572 Non-destructive heralded entanglement with photons is a valuable resource for quantum information processing. However, they generally entail ancillary particles and modes that amplify the circuit intricacy. To address this challenge, […]
Quantum 8, 1571 (2024). https://doi.org/10.22331/q-2024-12-18-1571 Optimized quantum control can enhance the performance and noise resilience of quantum metrology. However, the optimization quickly becomes intractable when multiple control operations are applied sequentially. In this work, we […]
Quantum 8, 1570 (2024). https://doi.org/10.22331/q-2024-12-17-1570 The popular qubit framework has dominated recent work on quantum kernel machine learning, with results characterising expressivity, learnability and generalisation. As yet, there is no comparative framework to understand these […]
Quantum 8, 1569 (2024). https://doi.org/10.22331/q-2024-12-17-1569 As quantum processors advance, the emergence of large-scale decentralized systems involving interacting quantum-enabled agents is on the horizon. Recent research efforts have explored quantum versions of Nash and correlated equilibria […]
Quantum 8, 1568 (2024). https://doi.org/10.22331/q-2024-12-17-1568 We explore the cryptographic power of arbitrary shared physical resources. The most general such resource is access to a fresh entangled quantum state at the outset of each protocol execution. […]
Quantum 8, 1567 (2024). https://doi.org/10.22331/q-2024-12-17-1567 Hamiltonian simulation is arguably the most fundamental application of quantum computers. The Magnus operator is a popular method for time-dependent Hamiltonian simulation in computational mathematics, yet its usage requires the […]
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