Tootfinder

Multiple crossover in the decay of metastable volume fraction of a Blume-Capel ferromagnetic needle
Ishita Tikader, Muktish Acharyya
https://arxiv.org/abs/2508.15219 https://

Multiple crossover in the decay of metastable volume fraction of a Blume-Capel ferromagnetic needle
The transient behaviours of a Blume-Capel ferromagnetic needle have been studied extensively by Monte-Carlo simulation. The needle has an elongated length in one direction compared to its cross-section. In the context of transient behaviour, we have captured the decay of the metastable state and the magnetic relaxation behaviours in our study. The dependence of metastable behaviour with anisotropy (single site) has been studied. \emph{Interestingly, we have observed multiple (different values o…

On the isomorphism problem for generalized Baumslag-Solitar groups: angles
Dario Ascari, Montserrat Casals-Ruiz, Ilya Kazachkov
https://arxiv.org/abs/2508.03231 https://

On the isomorphism problem for generalized Baumslag-Solitar groups: angles
We introduce a new isomorphism invariant for generalized Baumslag-Solitar (GBS) groups, which we call the limit angle. Unlike previously known invariants, which are primarily algebraic, the limit angle admits a dynamical interpretation, arising exclusively in the case of two interacting edges. This invariant captures subtle geometric behavior that does not manifest in configurations with more interacting edges. As an application, we use the limit angle to obtain a classification of GBS groups w…

Dissipation in passive non-reciprocal microwave devices
Stefano Bosco
https://arxiv.org/abs/2509.00874 https://arxiv.org/pdf/2509.00874

Dissipation in passive non-reciprocal microwave devices
Non-reciprocal devices are key components in both classical and quantum electronics. One approach to realizing passive non-reciprocal microwave devices is through capacitive coupling between external electrodes and materials exhibiting non-reciprocal conductance. In this work, we develop an analytic framework that captures the response of such devices in the presence of dissipation while accounting for the full AC dynamics of the material. Our results yield an effective circuit model that accur…