Coleman-de Luccia transitions are spontaneous processes of nucleation bubbles within metastable gravitational vacua including in their interior a true stable vacuum. From the perspective lower-dimensional gauged supergravities obtained by truncating Type II and M-theory, these instantonic represented smooth domain walls featured de Sitter foliations. These geometries must connect two different ...

It was recently discovered that, depending on their symmetries, collinear antiferromagnets can actually break the spin degeneracy in momentum space, even absence of spin-orbit coupling. Such systems, dubbed altermagnets, are signalled by emergence a spin-momentum texture set mainly crystal and magnetic structure, relativistic effects playing secondary role. Here we consider all $q$=0 antiferrom...

The spin-1/2 kagom\'{e} Heisenberg antiferromagnet is generally accepted as one of the most promising two-dimensional models to realize a quantum spin liquid state. Previous experimental efforts were almost exclusively on only archetypal material, herbertsmithite ZnCu$_3$(OH)$_6$Cl$_2$, which unfortunately suffers from notorious orphan spins problem caused by magnetic disorders. Here we turn YC...

The acoustic modes of a rotating fluid-filled cavity can be used to determine the effective rotation rate fluid (since resonant frequencies are modified by flows). To accurate, this method requires prior knowledge in fluids. Contrary Coriolis force, centrifugal gravity has received much less attention experimental context. Motivated on-going experiments ellipsoids, we study how global and buoya...

Topological semimetal states having the minimal number, i.e., only a single pair, of Weyl points are desirable for study effects associated with chiral topological charges. So far, search such is focused on magnetic spinful systems. Here, we find that nonmagnetic spinless systems can host class single-pair-Weyl-point (SP-WP) states, where two located at high-symmetry time-reversal-invariant mom...

The spin-orbit coupled double perovskite iridate Ba$_2$YIrO$_6$ with $d^4$ occupancy of Ir is considered as a candidate material for non-magnetic $J=0$ ground state. issue existence such state in however has opened up intense debates both experimental and theoretical studies. In this study, we revisit the using \textit{ab-initio} density functional combined dynamical mean-field theory to invest...

The existence of exchange-coupled Ni$^{2+}$ ions -- the so-called magnetic dimers in wolframite-type NiWO$_4$ and Zn$_c$Ni$_{1-c}$WO$_4$ solid solutions with high nickel content was discovered by X-ray absorption spectroscopy combined reverse Monte Carlo (RMC) simulations. Temperature- (10--300 K) composition-dependent x-ray spectra were measured at Ni K-edge, Zn W L$_3$-edge microcrystalline N...

The point-plane, the point-line, and plane-line incidence matrices of $$\mathrm {PG}(3,q)$$ are interest in combinatorics, finite geometry, graph theory group theory. Some properties these their submatrices related with interplay orbits points, lines planes under action subgroups {PGL}(4,q)$$ . A remarkable particular case is subgroup $$G\cong \mathrm {PGL}(2,q)$$ , viewed as stabilizer twisted...

The existence of exchange-coupled Ni$^{2+}$ ions -- the so-called magnetic dimers in wolframite-type NiWO$_4$ and Zn$_c$Ni$_{1-c}$WO$_4$ solid solutions with high nickel content was discovered by X-ray absorption spectroscopy combined reverse Monte Carlo (RMC) simulations. Temperature- (10--300 K) composition-dependent x-ray spectra were measured at Ni K-edge, Zn W L$_3$-edge microcrystalline N...