We investigate macroscopic entanglement in an infinite XX spin1 2 chain with staggered magnetic field, Bl = B + e −iπl b. Using single-site entropy and by constructing an entanglement witness, we search for the existence of entanglement when the system is at absolute zero, as well as in thermal equilibrium. Although the role of the alternating magnetic field b is, in general, to suppress entang...

We consider random singlet phases of spin-$\frac{1}{2}$, random, antiferromagnetic spin chains, in which the universal leading-order divergence $\frac{\ln 2}{3}\ln\ell$ average entanglement entropy a block $\ell$ spins, as well closely related leading term $\frac{2}{3}l^{-2}$ distribution lengths are known by strong-disorder renormalization group (SDRG) method. Here, we address question how lar...

Chick cDNA clones for a new member of the FACIT (fibril-associated collagens with interrupted triple helices) subfamily have been isolated and sequenced. The collagen chain encoded by these cDNAs was assigned the next consecutive number, making it the alpha1(XX) collagen chain. Assignment of type XX collagen to the FACIT family was based on sequence similarities to types XII and XIV collagen. T...

We develop a new protocol for sharing entanglement (one ebit) between two parties using the natural dynamics of helical multiferroic spin chains. introduce novel kicking scheme electric field enhancing teleportation fidelity in our that works presence an appropriate choice parameters. also investigate effect common environment causing decoherence channel. compare results to XXZ and XX models su...

Interacting central spin systems, in which a is coupled to strongly correlated bath with intrabath interaction, consist of an important class systems beyond the usual Gaudin magnet. These are relevant several realistic setups and serve as interesting platform study interaction controlled decoherence frustration induced instability magnetic order. Using equations-of-motion method based on analyt...

Exotic entanglement entropy scaling properties usually present interesting structures in real space and novel metrics of the spacetime lattice. One prominent example is rainbow chain where lattice sites which are symmetric about center form entangled Bell pairs due to an effective long-range coupling strong inhomogeneity regime. This manuscript generalizes a Hausdorff dimension one embedded hig...