568 citations · 1.1k across the 16 of their papers we have counts for
16 papers
Observation of non-Hermitian topology and its bulk-edge correspondence in an active mechanical metamaterial
Ananya Ghatak, Martin Brandenbourger, Jasper van Wezel +1
Topological edge modes are excitations that are localized at the materials' edges and yet are characterized by a topological invariant defined in the bulk. Such bulk-edge correspon…
A new Berry phase term in parity-time symmetric non-Hermitian spin-1/2 quantum systems
Ananya Ghatak, Tanmoy Das
Recently developed parity () and time-reversal () symmetric non-Hermitian quantum theory is envisioned to have far-reaching implications in basic science…
New topological invariants in non-Hermitian systems
Ananya Ghatak, Tanmoy Das
Both theoretical and experimental studies of topological phases in non-Hermitian systems have made a remarkable progress in the last few years of research. In this article, we revi…
Theory of superconductivity with non-Hermitian and parity-time reversal symmetric cooper pairing symmetry
Ananya Ghatak, Tanmoy Das
Recently developed parity (P) and time-reversal (T) symmetric non-Hermitian systems govern a rich variety of new and characteristically distinct physical properties, which may or m…
Photo-induced SU(3) topological material of spinless fermions
Sayonee Ray, Ananya Ghatak, Tanmoy Das
Generation of topological phases of matter with SU(3) symmetry in a condensed matter setup is challenging due to the lack of an intrinsic three-fold chirality of quasiparticles. We…
PT-Symmetric Model of Immune Response
Carl M. Bender, Ananya Ghatak, Mariagiovanna Gianfreda
The study of PT-symmetric physical systems began in 1998 as a complex generalization of conventional quantum mechanics, but beginning in 2007 experiments began to be published in w…
PT phase transition in a (2+1)-d relativistic system
Bhabani Prasad Mandal, Brijesh K. Mourya, Kawsar Ali +1
We study a massless Dirac particle with PT symmetric non-Hermitian Rashba interaction in the background of Dirac oscillator potential to show the PT phase transition in a (2+1) dim…
Hartman-Fletcher effect for array of complex barriers
Ananya Ghatak, Mohammad Hasan, Bhabani Prasad Mandal
We calculate the time taken by a wave packet to tunnel through a series of complex barrier potentials using stationary phase method to show its saturation (Hartman-Fletcher effect)…
A black potential for spin less particles
Ananya Ghatak, Mohammad Hasan, Bhabani Prasad Mandal
We consider the most general non-Hermitian Hulthen potential to study the scattering of spin-less relativistic particles. The conditions for CC, SS and CPA are obtained analyticall…
Reciprocity in parity violating non-Hermitian systems
Ananya Ghatak, Brijesh Kumar Mourya, Raka Dona Ray Mandal +1
Reciprocity is shown so far only when the scattering potential is either real or parity symmetric complex. We extend this result for parity violating complex potential by consideri…
Critical coupling and coherent perfect absorption for ranges of energies due to a complex gain and loss symmetric system
Mohammad Hasan, Ananya Ghatak, Bhabani Prasad Mandal
We consider a non-Hermitian medium with a gain and loss symmetric, exponentially damped potential distribution to demonstrate different scattering features analytically. The condit…
Various Scattering Properties of a New PT-symmetric non-Hermitian potential
Ananya Ghatak, Raka Dona Ray Mandal, Bhabani Prasad Mandal
We complexify a 1-d potential which exhibits bound, reflecting and free states to study various properties of a non-Hermitian system. This potential turns out a PT-symmetric non-He…
Comparison of different approaches of finding the positive definite metric in pseudo-Hermitian theories
Ananya Ghatak, Bhabani Prasad Mandal
To develop a unitary quantum theory with probabilistic description for pseudo- Hermitian systems one needs to consider the theories in a different Hilbert space endowed with a posi…
Spectral singularity and non-Hermitian PT-symmetric extension of type Calogero model without confining potential
Bhabani Prasad Mandal, Ananya Ghatak
We consider non-Hermitian PT-symmetric deformation of type Calogero model without confining potential to investigate the possible existence of spectral singularity. By co…
Spectral singularity and deep multiple minima in the reflectivity in non-Hermitian (complex) Ginocchio potential
Ananya Ghatak, Bhabani Prasad Mandal, Zafar Ahmed
We bring out the existence of at most one spectral singularity (SS) and deep multiple minima in the reflectivity of the non-Hermitian (complex) Ginocchio potential. We find a param…
Entangled Quantum State Discrimination using Pseudo-Hermitian System
Ananya Ghatak, Bhabani Prasad Mandal
We demonstrate how to discriminate two non-orthogonal, entangled quantum state which are slightly different from each other by using pseudo-Hermitian system. The positive definite…