Quantum 8, 1245 (2024). https://doi.org/10.22331/q-2024-02-08-1245 We present a generalized framework to adapt universal quantum state approximators, enabling them to satisfy rigorous normalization and autoregressive properties. We also introduce filters as analogues to convolutional layers in […]
Quantum 8, 1244 (2024). https://doi.org/10.22331/q-2024-02-08-1244 We present an analytical method to estimate pure quantum states using a minimum of three measurement bases in any finite-dimensional Hilbert space. This is optimal as two bases are insufficient […]
Quantum 8, 1243 (2024). https://doi.org/10.22331/q-2024-02-06-1243 We provide new examples of pure entangled systems related to cluster state quantum computation that can be efficiently simulated classically. In cluster state quantum computation input qubits are initialised in […]
Quantum 8, 1242 (2024). https://doi.org/10.22331/q-2024-02-05-1242 Classical non-perturbative simulations of open quantum systems’ dynamics face several scalability problems, namely, exponential scaling of the computational effort as a function of either the time length of the simulation […]
Quantum 8, 1241 (2024). https://doi.org/10.22331/q-2024-02-05-1241 Quantum processes with indefinite causal structure emerge when we wonder which are the most general evolutions, allowed by quantum theory, of a set of local systems which are not assumed […]
Quantum 8, 1240 (2024). https://doi.org/10.22331/q-2024-02-05-1240 We analyse nonclassical resources in interference phenomena using generalized noncontextuality inequalities and basis-independent coherence witnesses. We use recently proposed inequalities that witness both resources within the same framework. We also […]
Quantum 8, 1239 (2024). https://doi.org/10.22331/q-2024-02-01-1239 Variational quantum algorithms, which combine highly expressive parameterized quantum circuits (PQCs) and optimization techniques in machine learning, are one of the most promising applications of a near-term quantum computer. Despite […]
Quantum 8, 1238 (2024). https://doi.org/10.22331/q-2024-01-31-1238 We construct a lower bound of the tensor rank for a new class of tensors, which we call $textit{persistent tensors}$. We present three specific families of persistent tensors, of which […]
Quantum 8, 1237 (2024). https://doi.org/10.22331/q-2024-01-30-1237 The interaction between localized emitters and quantum fields, both in relativistic settings and in the case of ultra-strong couplings, requires non-perturbative methods beyond the rotating-wave approximation. In this work we […]
Quantum 8, 1236 (2024). https://doi.org/10.22331/q-2024-01-30-1236 High-dimensional entanglement has been identified as an important resource in quantum information processing, and also as a main obstacle for simulating quantum systems. Its certification is often difficult, and most […]
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