275 citations · 1.1k across the 36 of their papers we have counts for
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The fate of small classically stable Q-balls
Dmitry Levkov, Emin Nugaev, Andrei Popescu
The smallest classically stable Q-balls are, in fact, generically metastable: in quantum theory they decay into free particles via collective tunneling. We derive general semiclass…
Fatal youth of the Universe: black hole threat for the electroweak vacuum during preheating
Dmitry Gorbunov, Dmitry Levkov, Alexander Panin
Small evaporating black holes were proposed to be dangerous inducing fast decay of the electroweak false vacuum. We observe that the flat-spectrum matter perturbations growing at t…
Exact solutions and critical chaos in dilaton gravity with a boundary
Maxim Fitkevich, Dmitry Levkov, Yegor Zenkevich
We consider (1+1)-dimensional dilaton gravity with a reflecting dynamical boundary. The boundary cuts off the region of strong coupling and makes our model causally similar to the…