15 citations · 64 across the 14 of their papers we have counts for
14 papers
Tomographic flow regime vs even-odd effect for the magnetotransport in the Corbino geometry
Grigory A. Starkov
In two dimensions, the geometric constraints due to Pauli blocking and conservation laws lead to the even-odd effect exhibited by the electron-electron scattering lengths: electron…
Converting non-Hermitian degeneracies of any order: Hierarchies of exceptional points and degeneracy manifolds
Grigory A. Starkov, Sharareh Sayyad
The emergence of various types of degeneracies plays a crucial role in optimizing and engineering different physical phenomena in non-Hermitian physics. In our work, we focus on th…
Characterizing all non-Hermitian degeneracies using algebraic approaches: Defectiveness and asymptotic behavior
Sharareh Sayyad, Grigory A. Starkov
The presence of degeneracies plays a crucial role in describing the behavior of non-Hermitian (NH) systems. In these systems, there are two key types of degeneracies: -bolical d…
Multi-block exceptional points in open quantum systems
Aysel Shiralieva, Grigory A. Starkov, Björn Trauzettel
Open quantum systems can be approximately described by non-Hermitian Hamiltonians (NHHs) and Liouvillian superoperators. The two approaches differ by quantum jump terms correspondi…
Anomalous Knudsen effect signaling long-lived modes in 2D electron gases
Grigory A. Starkov, Björn Trauzettel
Proper analysis of electron collisions in two spatial dimensions leads to the conclusion, that the odd harmonics of the electron distribution function decay much slower than the ev…
Interplay of pseudo-Hermitian symmetries and degenerate manifolds in the eigenspectrum of non-Hermitian systems
Grigory A. Starkov
In this letter, we study how the spectrum of pseudo-Hermitian systems is influenced by the ambiguity in the choice of the pseudo-metric operator. In particular, we analyze the case…
Schrieffer-Wolff transformation for non-Hermitian systems: application for -symmetric circuit QED
Grigory A. Starkov, Mikhail V. Fistul, Ilya M. Eremin
Combining non-hermiticity and interactions yields novel effects in open quantum many-body systems. Here, we develop the generalized Schrieffer-Wolff transformation and derive the e…
Formation of Exceptional Points in pseudo-Hermitian Systems
Grigory A. Starkov, Mikhail V. Fistul, Ilya M. Eremin
Motivated by the recent growing interest in the field of -symmetric Hamiltonian systems we theoretically study the emergency of singularities called Excepti…
Quantum phase transitions in non-Hermitian -symmetric transverse-field Ising spin chains
Grigory A. Starkov, Mikhail V. Fistoul, Ilya M. Eremin
We present a theoretical study of quantum phases and quantum phase transitions occurring in non-Hermitian -symmetric superconducting qubits chains described…
Slowly decaying real-time oscillations in instanton crystal
Grigory A. Starkov, Konstantin B. Efetov
Instanton crystal is a fascinating phase which is encountered when the minimum of the free energy corresponds to a configuration with an imaginary-time-dependent order parameter in…
Phase transition into Instanton Crystal
Grigory A. Starkov, Konstantin B. Efetov
We propose a class of models exhibiting instanton crystal phase. In this phase, the minimum of the free energy corresponds to a configuration with an imaginary-time-dependent order…
Free induction decays in nuclear spin-1/2 lattices with small number of interacting neighbors: the cases of silicon and fluorapatite
Grigory A. Starkov, Boris V. Fine
Nuclear spin-1/2 lattices where each spin has a small effective number of interacting neighbors represent a particular challenge for first-principles calculations of free induction…
Classical spin simulations with a quantum two-spin correction
Patrick Navez, Grigory A. Starkov, Boris V. Fine
Classical simulations of high-temperature nuclear spin dynamics in solids are known to accurately predict relaxation for spin 1/2 lattices with a large number of interacting neighb…
Hybrid quantum-classical method for simulating high-temperature dynamics of nuclear spins in solids
Grigory A. Starkov, Boris V. Fine
First-principles calculations of high-temperature spin dynamics in solids in the context of nuclear magnetic resonance (NMR) is a long-standing problem, whose conclusive solution c…