14 citations · 27 across the 8 of their papers we have counts for
8 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…
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…
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…
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…
Signature of exceptional point phase transition in Hermitian systems
T. T. Sergeev, A. A. Zyablovsky, E. S. Andrianov +1
Exceptional point (EP) is a spectral singularity in non-Hermitian systems. The passing over the EP leads to a phase transition, which endows the system with unconventional features…
Environment-assisted strong coupling regime
T. T. Sergeev, I. V. Vovcenko, A. A. Zyablovsky +1
Strong coupling regime takes place in open hybrid systems consisting of two or more physical subsystems when the coupling strength between subsystems exceeds the relaxation rate. T…
A new type of non-Hermitian phase transition in open systems far from thermal equilibrium
T. T. Sergeev, A. A. Zyablovsky, E. S. Andrianov +3
We demonstrate a new type of non-Hermitian phase transition in open systems far from thermal equilibrium, which takes place in coupled systems interacting with reservoirs at differ…