We prove that quantum information propagates with a finite velocity in any model of interacting bosons whose (possibly time-dependent) Hamiltonian contains spatially local single-boson hopping terms along arbitrary density-dependent interactions. More precisely, the density matrix ρ∝exp[−μN] (with N total boson number), ensemble-averaged correlators form ⟨[A0,Br(t)]⟩, out-of-time-ordered correl...

This paper studies efficient programmed hierarchies as introduced by Radner (1993) in which agents cannot process information perfectly. A group of P identical managers has to make a choice between n alternatives. In order to learn which is the best option, the alternatives have to be compared. The evaluation of an alternative takes time and managers are only able to identify the better one of ...

On three occasions, 63 adults, ranging in age from 26 to 80 years, all in good health, were tested with three speed of information-processing paradigms (the Stemberg, the Posner, and the Hick), two long-term free-recall tasks, and, as a measure of fluid intelligence, the Raven Advanced Progressive Matrices (RAPM) test. Whereas within-condition latencies for the three of the information-processi...

Visual inspection time (IT) is a measure of information-processing speed, which correlates reliably with psychometric intelligence. Pharmacological research into IT indicates that manipulation of the cholinergic system modulates performance on the IT task, however the contribution of other neurotransmitters to this modality remains unclear. This study was designed to examine the effects of low ...