167 citations · 818 across the 30 of their papers we have counts for
31 papers
Observation of Restored Adiabatic State Transfer in Time-Modulated Non-Hermitian Systems
Xiaowei Wang, Ievgen I. Arkhipov, Quan Lin +5
Exceptional points (EPs) have attracted extensive research interest due to their intriguing properties. One of the hallmarks of EP physics is that dynamically encircling the EPs in…
Covariant formulation of the Berry connection in non-Hermitian systems
Ievgen I. Arkhipov
Non-Hermitian systems exhibit spectral and topological phenomena absent in Hermitian physics; however, their geometric characterization remains subtle due to the intrinsic ambiguit…
Achieving the Quantum Fisher Information Bound in Pseudo-Hermitian Sensors
Ievgen I. Arkhipov, Franco Nori, Şahin K. Özdemir
Non-Hermitian systems have attracted considerable interest over the last few decades due to their unique spectral and dynamical properties not encountered in Hermitian counterparts…
Topological state permutations in time-modulated non-Hermitian multiqubit systems with suppressed non-adiabatic transitions
Ievgen I. Arkhipov, Philippe Lewalle, Franco Nori +2
Non-Hermitian systems have been at the center of intense research for over a decade, partly due to their nontrivial energy topology formed by intersecting Riemann manifolds with br…
How to realize compact and non-compact localized states in disorder-free hypercube networks
Ievgen I. Arkhipov, Fabrizio Minganti, Franco Nori
We present a method for realizing various zero-energy localized states on disorder-free hypercube graphs. Previous works have already indicated that disorder is not essential for o…
Restoring Adiabatic State Transfer in Time-Modulated Non-Hermitian Systems
Ievgen I. Arkhipov, Fabrizio Minganti, Adam Miranowicz +2
Non-Hermitian systems have attracted much interest in recent decades, driven partly by the existence of exotic spectral singularities, known as exceptional points (EPs), where the…
Dynamically crossing diabolic points while encircling exceptional curves: A programmable symmetric-asymmetric multimode switch
Ievgen I. Arkhipov, Adam Miranowicz, Fabrizio Minganti +2
Nontrivial spectral properties of non-Hermitian systems can lead to intriguing effects with no counterparts in Hermitian systems. For instance, in a two-mode photonic system, by dy…
Creating and controlling exceptional points of non-Hermitian Hamiltonians via homodyne Lindbladian invariance
Fabrizio Minganti, Dolf Huybrechts, Cyril Elouard +2
The Exceptional Points (EPs) of non-Hermitian Hamiltonians (NHHs) are spectral degeneracies associated with coalescing eigenvalues and eigenvectors which are associated with remark…
Fully solvable finite simplex lattices with open boundaries in arbitrary dimensions
Ievgen I. Arkhipov, Adam Miranowicz, Franco Nori +2
Finite simplex lattice models are used in different branches of science, e.g., in condensed matter physics, when studying frustrated magnetic systems and non-Hermitian localization…
Emergent non-Hermitian localization phenomena in the synthetic space of zero-dimensional bosonic systems
Ievgen I. Arkhipov, Fabrizio Minganti
Phase transitions in non-Hermitian systems are at the focus of cutting edge theoretical and experimental research. On the one hand, parity-time- (-) and anti--sym…
Continuous Dissipative Phase Transitions without Symmetry Breaking
Fabrizio Minganti, Ievgen I. Arkhipov, Adam Miranowicz +1
The paradigm of second-order phase transitions (PTs) induced by spontaneous symmetry breaking (SSB) in thermal and quantum systems is a pillar of modern physics that has been fruit…
Liouvillian spectral collapse in the Scully-Lamb laser model
Fabrizio Minganti, Ievgen I. Arkhipov, Adam Miranowicz +1
Phase transitions of thermal systems and the laser threshold were first connected more than forty years ago. Despite the nonequilibrium nature of the laser, the Landau theory of th…
Generating high-order quantum exceptional points in synthetic dimensions
Ievgen I. Arkhipov, Fabrizio Minganti, Adam Miranowicz +1
Recently, there has been intense research in proposing and developing various methods for constructing high-order exceptional points (EPs) in dissipative systems. These EPs can pos…
Correspondence between dissipative phase transitions of light and time crystals
Fabrizio Minganti, Ievgen I. Arkhipov, Adam Miranowicz +1
We predict the emergence of a time crystal generated by an incoherently driven and dissipative nonlinear optical oscillator, where the nonlinearity also comes from dissipation. We…
Universal non-Markovianity Detection in Hybrid Open Quantum Systems
Jiří Svozilík, Raúl Hidalgo-Sacoto, Ievgen I. Arkhipov
A universal characterization of non-Markovianity for any open hybrid quantum systems is presented. This formulation is based on the negativity volume of the generalized Wigner func…
Liouvillian exceptional points of any order in dissipative linear bosonic systems: Coherence functions and switching between and anti- symmetries
Ievgen I. Arkhipov, Adam Miranowicz, Fabrizio Minganti +1
Usually, when investigating exceptional points (EPs) of an open Markovian bosonic system, one deals with spectral degeneracies of a non-Hermitian Hamiltonian (NHH), which can corre…
Hybrid-Liouvillian formalism connecting exceptional points of non-Hermitian Hamiltonians and Liouvillians via postselection of quantum trajectories
Fabrizio Minganti, Adam Miranowicz, Ravindra W. Chhajlany +2
Exceptional points (EPs) are degeneracies of classical and quantum open systems, which are studied in many areas of physics including optics, optoelectronics, plasmonics, and conde…
Quantum and semiclassical exceptional points of a linear system of coupled cavities with losses and gain within the Scully-Lamb laser theory
Ievgen I. Arkhipov, Adam Miranowicz, Fabrizio Minganti +1
In the past few decades, many works have been devoted to the study of exceptional points (EPs), i.e., exotic degeneracies of non-Hermitian systems. The usual approach in those stud…
Enhancing entanglement detection of quantum optical frequency combs via stimulated emission
Ievgen I. Arkhipov, Tai Hyun Yoon, Adam Miranowicz
We investigate the performance of a certain nonclassicality identifier, expressed via integrated second-order intensity moments of optical fields, in revealing bipartite entangleme…
Scully-Lamb quantum laser model for parity-time-symmetric whispering-gallery microcavities: Gain saturation effects and non-reciprocity
Ievgen I. Arkhipov, Adam Miranowicz, Omar Di Stefano +4
We use a non-Lindbladian master equation of the Scully-Lamb laser model for the analysis of light propagation in a parity-time symmetric photonic system composed of coupled active…
Negativity volume of the generalized Wigner function as an entanglement witness for hybrid bipartite states
Ievgen I. Arkhipov, Artur Barasiński, Jiří Svozilík
In a recent paper, Tilma, Everitt {\it et al.} derived a generalized Wigner function that can characterize both the discrete and continuous variable states, i.e., hybrid states. As…
Characterization of nonclassicality of Gaussian states initially generated in optical spontaneous parametric processes by means of induced stimulated emission
Ievgen I. Arkhipov
In a recent paper [I.I. Arkhipov, Phys. Rev. A 98, 021803 (2018)], it was shown that one can completely identify the nonclassicality of single- and two-mode Gaussian states by mean…
Complete identification of nonclassicality of Gaussian states via intensity moments
Ievgen I. Arkhipov
We present an experimental method for complete identification of the nonclassicality of Gaussian states in the whole phase space. Our method relies on nonclassicality witnesses wri…
Nonclassicality and entanglement criteria for bipartite optical fields characterized by quadratic detectors
Jan Perina, Ievgen I. Arkhipov, Vaclav Michalek +1
Numerous inequalities involving moments of integrated intensities and revealing nonclassicality and entanglement in bipartite optical fields are derived using the majorization theo…