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It was proposed recently that the black hole may undergo a transition to thestate, where inside the horizon the Fermi surface is formed that reveals ananalogy with the recently discovered type II Weyl semimetals. In this scenariothe low energy effective theory outside of the horizon is the Standard Model,which describes excitations that reside near a certain point $P^{(0)}$ inmomentum space of the hypothetical unified theory. Inside the horizon the lowenergy physics is due to the excitations that reside at the points in momentumspace close to the Fermi surface. We argue that those points may be essentiallydistant from $P^{(0)}$ and, therefore, inside the black hole the quantum statesare involved in the low energy dynamics that are not described by the StandardModel. We analyse the consequences of this observation for the physics of theblack holes and present the model based on the direct analogy with the type IIWeyl semimetals, which illustrates this pattern.

The black hole interior and the type II Weyl fermions