5 papers
Exceptional points of arbitrary high orders induced by non-Markovian dynamics
Timofey T. Sergeev, Evgeny S. Andrianov, Alexander A. Zyablovsky
Exceptional points are singularities in the spectrum of non-Hermitian systems in which several eigenvectors are linearly dependent and their eigenvalues are equal to each other. Us…
Non-Markovian protection of states from decay in quasi-PT-symmetric systems
T. T. Sergeev, E. S. Andrianov, A. A. Zyablovsky
We consider a quasi-PT-symmetric system of two resonators, one of which interacts with a finite-size environment. The interaction with the environment leads to energy losses in the…
Spontaneous symmetry emergence in a Hermitian system of coupled oscillators without symmetry
T. T. Sergeev, E. S. Andrianov, A. A. Zyablovsky
Spontaneous symmetry breaking in systems with symmetry is a cornerstone phenomenon accompanying second-order phase transitions. Here, we predict the opposite phenomenon, namely, sp…
Anomalous dependence of sensitivity on observation time caused by memory retention in the time crystal
T. T. Sergeev, A. A. Zyablovsky, E. S. Andrianov
In this work, we consider a composite atom-cavity system interacting with a ring resonator. In such a structure, time crystal regime can be observed. We show that a quadratic obser…
Transition from non-ergodic to ergodic dynamics in an autonomous discrete time crystal
T. T. Sergeev, A. A. Zyablovsky, E. S. Andrianov
We consider an autonomous system of two coupled single-mode cavities, one of which interacts with a multimode resonator. We demonstrate that for small coupling strengths between si…