Possession by a spirit or demon or God is an age old phenomenon which is still being reported from many countries all over the world. Possession syndrome is defined as an episodic disruption of behavior dur ing which it is presumed tha t the subject 's personality has been replaced by that of a spirit or God (Wintrob, 1973 ; Wijesinghe et al., 1976). I ts manifestations, purpose and consequence...

A Maxwell’s demon is a device that gets information and trades it in for thermodynamic advantage, in apparent (but not actual) contradiction to the second law of thermodynamics. Quantum-mechanical versions of Maxwell’s demon exhibit features that classical versions do not: in particular, a device that gets information about a quantum system disturbs it in the process. In addition, the informati...

We show that Maxwell's demon-like nonreciprocity can be supported in a class of non-Hermitian gyrotropic metasurfaces the linear regime. The proposed metasurface functions as transmission-only demon operating at pair photon energies. Based on multiple scattering theory, we construct dual-dipole model to explain underlying mechanism leads antisymmetric nonreciprocal transmission. results may ins...