We study the effect of inhomogeneities in the magnetic field on the thermal entanglement of a two spin system. We show that in the ferromagnetic case a very small inhomogeneity is capable to produce large values of thermal entanglement. This shows that the absence of entanglement in the ferromagnetic Heisenberg system is highly unstable against inhomogeneoity of magnetic fields which is inevita...

In this paper I discuss the magnetic phases of the three-flavor color superconductor. These phases can take place at different field strengths in a highly dense quark system. Given that the best natural candidates for the realization of color superconductivity are the extremely dense cores of neutron stars, which typically have very large magnetic fields, the magnetic phases here discussed coul...

The action of Weyl scale invariant p=2 brane which breaks the target super Weyl scale symmetry in the N=1, D=4 superspace down to the lower dimensional Weyl symmetry W (1, 2) is derived by the approach of nonlinear realization. The dual form action for the Weyl scale invariant supersymmetric D2 brane is also constructed. The interactions of localized matter fields on the brane with the Nambu-Go...

We extend a recently proposed formulation of dual gravity to the case of eleven-dimensional supergravity. The supersymmetric action corresponding to this alternative formulation is given, and it is shown that it leads to a set of first-order duality relations from which all second-order equations of motion follow as integrability conditions. On top of the fields corresponding to the conjectured...

We analyze theories in which a supersymmetric sector is coupled to a supersymmetrybreaking sector described by a non-linear realization. We show how to consistently couple N = 1 supersymmetric matter to non-supersymmetric matter in such a way that all interactions are invariant under non-linear supersymmetry transformations. We extend this formalism to couple N = 2 supersymmetric matter to N = ...

______________________________________________ 1. A servant of two masters 2. Realization and the metaphysics of mind 3. Realization and the cognitive sciences 4. A working account of realization 4.1 Must realization be decompositional? 4.2 Must realization be constitutive or intrinsic? 4.3 Must realization be synchronic? 5. Autonomy, reduction, and multiple realizability 6. Conclusion: Getting...

Ultracold atoms in optical lattices serve as a tool to model different physical phenomena appearing originally in condensed matter. To study magnetic phenomena one needs to engineer synthetic fields as atoms are neutral. Appropriately shaped optical potentials force atoms to mimic charged particles moving in a given field. We present the realization of artificial gauge fields for the observatio...

We extend a recently proposed formulation of dual gravity to the case of eleven-dimensional supergravity. The supersymmetric action corresponding to this alternative formulation is given, and it is shown that it leads to a set of first-order duality relations from which all second-order equations of motion follow as integrability conditions. On top of the fields corresponding to the conjectured...

We construct curved backgrounds with Euclidean signature admitting rigid supersymmetry by using a 5d N = 1 off-shell Poincaré supergravity. We solve the conditions for the background Weyl multiplet and vector multiplets that preserve at least one supersymmetry parameterized by a symplectic Majorana spinor, and represent the solution in terms of several independent fields. We also show that the ...

We present a realization of fracton-elasticity duality purely formulated in terms ordinary gauge fields, encompassing standard elasticity and incommensurate crystals. Our construction comprises description all types two-dimensional defects, body forces, impurities. The original form the tensor fields is recovered after partial fixing. identify coupling defects to dual from invariance we derive ...