Quantum 10, 2116 (2026). https://doi.org/10.22331/q-2026-05-26-2116 The Frauchiger–Renner paradox derives an inconsistency when quantum theory is used to describe the use of itself, by means of a scenario where agents model other agents quantumly and reason […]
Quantum 10, 2115 (2026). https://doi.org/10.22331/q-2026-05-22-2115 In classical information theory, the Doeblin coefficient of a classical channel provides an efficiently computable upper bound on the total-variation contraction coefficient of the channel, leading to what is known […]
Quantum 10, 2114 (2026). https://doi.org/10.22331/q-2026-05-22-2114 A defining feature of quantum many-body systems is the exponential scaling of the Hilbert space with the number of degrees of freedom. This exponential complexity naïvely renders a complete state […]
Quantum 10, 2113 (2026). https://doi.org/10.22331/q-2026-05-21-2113 Estimating quantum entropies and divergences is an important problem in quantum physics, information theory, and machine learning. Quantum neural estimators (QNEs), which utilize a hybrid classical-quantum architecture, have recently emerged […]
Quantum 10, 2112 (2026). https://doi.org/10.22331/q-2026-05-21-2112 We investigate the Floquet spectrum of a detuned, driven two-level system and show that it exhibits exact quasienergy crossings when the detuning is an integer multiple of the energy quantum […]
Quantum 10, 2111 (2026). https://doi.org/10.22331/q-2026-05-21-2111 Graph states are a key resource for a number of applications in quantum information theory. Due to the inherent noise in noisy intermediate-scale quantum (NISQ) era devices, it is important […]
Quantum 10, 2110 (2026). https://doi.org/10.22331/q-2026-05-20-2110 Quantum computing involving physical systems with continuous degrees of freedom, such as the quantum states of light, has recently attracted significant interest. However, a well-defined quantum complexity theory for these […]
Quantum 10, 2109 (2026). https://doi.org/10.22331/q-2026-05-20-2109 We time-evolve a translationally invariant quantum state on the Quantinuum H1-1 trapped-ion quantum processor, studying the dynamical quantum phase transition of the transverse field Ising model. This physics requires a […]
Quantum 10, 2108 (2026). https://doi.org/10.22331/q-2026-05-20-2108 There is great interest in generating and controlling entanglement in Bose-Einstein condensates and similar ensembles for use in quantum computation, simulation, and sensing. One class of entangled states useful for […]
Quantum 10, 2107 (2026). https://doi.org/10.22331/q-2026-05-18-2107 Floquet quantum circuits are able to realise a wide range of non-equilibrium quantum states, exhibiting quantum chaos, topological order and localisation. In this work, we investigate the stability of operator […]
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