Exceptional Spin Liquids from Couplings to the Environment

We establish the appearance of a qualitatively new type spin liquid with emergent exceptional points when coupling to environment. consider an open system Kitaev honeycomb model generically coupled external In extended parameter regimes, Dirac Majorana fermions from original are split into Fermi arcs connecting them. glaring contrast gapless phase that requires time-reversal symmetry, this is stable against all perturbations. The also displays large sensitivity boundary conditions resulting non-Hermitian skin effect telltale experimental consequences. Our results point emergence classes liquids in systems might be realized due unavoidable couplings