The discrimination problem for two ground states or two thermal states of the quantum Ising model

We address the one-dimensional quantum Ising model as an example of system exhibiting criticality and study in some details the discrimination problem for pairs of states corresponding to different values of the coupling constant. We evaluate the error probability for single-copy discrimination, the Chernoff bound for $n$-copy discrimination in the asymptotic limit, and the Chernoff metric for the discrimination of infinitesimally close states. We point out scaling properties of the above quantities, and derive the external field optimizing state discrimination for short chains as well as in the thermodynamical limit, thus assessing criticality as a resource for quantum discrimination in many-body systems.Comment: revised version, title changed, 4 fig

\u201c\u2018Nel suo No sempiterno a tutti i programmi della Joie.\u2019 Causa ideale e mito di Antigone nel Cardillo addolorato di Anna Maria Ortese\u201d.

L'intento di questo saggio \ue8 quello di fornire alcuni spunti interpretativi per il romanzo Il cardil-lo addolorato (1993) di Anna Maria Ortese, sulla scorta del modello psicanalitico lacaniano e di un confronto con il mito di Antigone. Il primo capitolo consiste in una breve introduzione alla complessit\ue0 esegetica dell'opera e al tema dell'enigma in senso fattuale e semantico. Successi-vamente si discute la posizione della protagonista Elmina quale oggetto del desiderio dei tre signori di Liegi e portavoce del discorso isterico. Infine, a partire da un confronto con possibili fonti testuali, si avanza l'ipotesi di una presenza sotterranea del mito di Antigone, per cui El-mina sarebbe una figura del desiderio utopico: la sua devozione per Hieronymus K\ue4ppchen assume le sembianze di un'intransigenza etica che evoca in tono minore ma non meno doloroso il dramma di Antigone

Towards Efficient Full Pose Omnidirectionality with Overactuated MAVs

Omnidirectional MAVs are a growing field, with demonstrated advantages for aerial interaction and uninhibited observation. While systems with complete pose omnidirectionality and high hover efficiency have been developed independently, a robust system that combines the two has not been demonstrated to date. This paper presents VoliroX: a novel omnidirectional vehicle that can exert a wrench in any orientation while maintaining efficient flight configurations. The system design is presented, and a 6 DOF geometric control that is robust to singularities. Flight experiments further demonstrate and verify its capabilities.Comment: 10 pages, 6 figures, ISER 2018 conference submissio

The “Seal of Rodogune” from Parthian Nisa

The name of Rodogune was not applied only to the well known statuette of Aphrodite Anadyomene from Parthian Nisa, but also to a seal impressed on a sealing from the Nisa Square House. Although the attribution of the seal, unlike that of the statuette, was not discussed in detail, the portrait depicted on it was recognized as that of the Arsacid princess. Actually, the head is not female, but male, and can in all likelihood be that of Apollo with a laurel wreath. The style of execution suggests a relatively late date for the seal, not before the end of the 1st century BC –1st century AD, and allows its impression to be included in the general group of sealings from the Square House of Nisa