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 […]
Quantum 8, 1566 (2024). https://doi.org/10.22331/q-2024-12-17-1566 Bosonic systems with negative Wigner function superposition states are fundamentally witnessing nonlinear quantum dynamics beyond linearized systems and, recently, have become essential resources of quantum technology with many applications. Typically, […]
Quantum 8, 1565 (2024). https://doi.org/10.22331/q-2024-12-16-1565 We study the back-reaction of quantum systems onto classical ones. Taking the starting point that semi-classical physics should be described at all times by a point in classical phase space […]
Dear Quantum community, We want to update authors on an important change in Quantum Journal’s publication fees (also known as article processing charges or APCs). From January 2025, the default publication fee for Quantum will […]
Quantum 8, 1564 (2024). https://doi.org/10.22331/q-2024-12-12-1564 Quantum energy teleportation (QET) is the phenomenon in which locally inaccessible energy is activated as extractable work through collaborative local operations and classical communication (LOCC) with an entangled partner. It […]
Quantum 8, 1563 (2024). https://doi.org/10.22331/q-2024-12-12-1563 Quantum computing has emerged as a promising avenue for achieving significant speedup, particularly in large-scale PDE simulations, compared to classical computing. One of the main quantum approaches involves utilizing Hamiltonian […]
Quantum 8, 1562 (2024). https://doi.org/10.22331/q-2024-12-12-1562 Floquet codes are an intriguing generalisation of stabiliser and subsystem codes, which can provide good fault-tolerant characteristics while benefiting from reduced connectivity requirements in hardware. A recent question of interest […]
Quantum 8, 1561 (2024). https://doi.org/10.22331/q-2024-12-11-1561 A spin (qubit) is in contact with a bosonic reservoir. The state of the reservoir contains a parameter $varepsilon$ interpolating between quantum and classical reservoir features. We derive the explicit […]
Quantum 8, 1560 (2024). https://doi.org/10.22331/q-2024-12-11-1560 Tensor networks provide succinct representations of quantum many-body states and are an important computational tool for strongly correlated quantum systems. Their expressive and computational power is characterized by an underlying […]
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