Quantum 8, 1275 (2024). https://doi.org/10.22331/q-2024-03-07-1275 Variational quantum algorithms use non-convex optimization methods to find the optimal parameters for a parametrized quantum circuit in order to solve a computational problem. The choice of the circuit ansatz, […]
Quantum 8, 1274 (2024). https://doi.org/10.22331/q-2024-02-29-1274 The quantum simulation of gauge theories on synthetic quantum matter devices has gained a lot of traction in the last decade, making possible the observation of a range of exotic […]
Quantum 8, 1273 (2024). https://doi.org/10.22331/q-2024-02-29-1273 We investigate the effect of entanglement dynamics due to gravity – the basis of a mechanism of universal decoherence – for photonic states and quantum memories in Mach-Zehnder and Hong-Ou-Mandel […]
Quantum 8, 1272 (2024). https://doi.org/10.22331/q-2024-02-29-1272 Let $G$ and $G’$ be monoidally equivalent compact quantum groups, and let $H$ be a Hopf-Galois object realising a monoidal equivalence between these groups’ representation categories. This monoidal equivalence induces […]
Quantum 8, 1271 (2024). https://doi.org/10.22331/q-2024-02-29-1271 We uncover a novel dynamical quantum phase transition, using random matrix theory and its associated notion of planar limit. We study it for the isotropic XY Heisenberg spin chain. For […]
Quantum 8, 1270 (2024). https://doi.org/10.22331/q-2024-02-29-1270 The study of state transformations by spatially separated parties with local operations assisted by classical communication (LOCC) plays a crucial role in entanglement theory and its applications in quantum information […]
Quantum 8, 1269 (2024). https://doi.org/10.22331/q-2024-02-29-1269 We study the discrimination of von Neumann measurements in the scenario when we are given a reference measurement and some other measurement. The aim of the discrimination is to determine […]
Quantum 8, 1268 (2024). https://doi.org/10.22331/q-2024-02-29-1268 Quantum loop models are well studied objects in the context of lattice gauge theories and topological quantum computing. They usually carry long range entanglement that is captured by the topological […]
Quantum 8, 1267 (2024). https://doi.org/10.22331/q-2024-02-27-1267 Naive attempts to put together relativity and quantum measurements lead to signaling between space-like separated regions. In QFT, these are known as $textit{impossible measurements}$. We show that the same problem […]
Quantum 8, 1266 (2024). https://doi.org/10.22331/q-2024-02-26-1266 Quantum metrology allows for measuring properties of a quantum system at the optimal Heisenberg limit. However, when the relevant quantum states are prepared using digital Hamiltonian simulation, the accrued algorithmic […]
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