162 citations · 369 across the 37 of their papers we have counts for
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Heisenberg uniqueness pairs for the Fourier transform on the Heisenberg group
Somnath Ghosh, R. K. Srivastava
In this article, we prove that (unit sphere, non-harmonic cone) is a Heisenberg uniqueness pair for the symplectic Fourier transform on We derive that spheres as wel…
Non-adiabatic Modal Dynamics around Exceptional Points in an All-Lossy Dual-Mode Optical Waveguide: Towards Chirality Driven Asymmetric Mode-Conversion
Arnab Laha, Abhijit Biswas, Somnath Ghosh
We report a 1D planar optical waveguide with transverse distribution of inhomogeneous loss profile, which exhibits an exceptional point (EP). The waveguide hosts two leaky resonant…
Propagation and asymmetric behavior of optical pulses through time-dynamic loss-gain assisted media
Piyali Biswas, Harsh K. Gandhi, Vaibhab Mishra +1
We report an asymmetric behavior of optical pulses during their propagation through a time-varying linear optical medium. The refractive index of the medium is considered to be var…
Origin of third order exceptional singularities and its signature in successive state conversion
Sayan Bhattacherjee, Arnab Laha, Somnath Ghosh
We report an open three-state perturbed system with quasi-statically varying Hamiltonian depending on the topological parameters. The effective system hosts two second order except…
Realization of Third Order Exceptional Singularities in a Three level non-Hermitian System: Towards Cascaded State Conversion
Sayan Bhattacherjee, Arnab Laha, Somnath Ghosh
The appearance of topological singularities, namely exceptional points (EPs) is an intriguing feature of parameter-dependent open quantum or wave systems. EPs are the special type…
Net-charge fluctuation in Au+Au collisions at energies available at the Facility for Antiproton and Ion Research using the UrQMD model
Somnath Ghosh, Provash Mali, Amitabha Mukhopadhyay
We have studied the dynamical fluctuation of net-charge of hadrons produced in Au+Au collisions at energies that in near future will be available at the Facility for Antiproton and…
Radial flow in a multi phase transport model at FAIR energies
Soumya Sarkar, Provash Mali, Somnath Ghosh +1
Azimuthal distributions of radial velocities of charged hadrons produced in nucleus-nucleus collisions are compared with the corresponding azimuthal distribution of charged…
Three State Quantum System Exhibiting Third Order Exceptional Singularities and Flip-of-States
Sayan Bhattacherjee, Arnab Laha, Somnath Ghosh
A quantum inspired open optical system is mathematically implemented with an analogous three state non-Hermitian Hamiltonian exhibiting two special avoided-resonance-crossings; whe…
All-Lossy Quasi-Guided Dual-Mode Optical Waveguide Exhibiting Exceptional Singularities
Arnab Laha, Abhijit Biswas, Somnath Ghosh
We explore exceptional points (EP) in a dual-mode symmetric planar optical waveguide with transverse variation of inhomogeneous loss profile; where modal evolution alongside an EP…
Exceptional Points in an Specialty Microcavity: Interplay between State-Conversion and Cavity Control Parameters
Arnab Laha, Abhijit Biswas, Somnath Ghosh
Exploiting scattering-matrix in a gain-loss assisted optical-microcavity, interplay between asymmetric-state-conversion and cavity-control parameters around exceptional points is a…
Signature of phase singularities in diffusive regime in one dimensional disordered lattices: Interplay and qualitative analysis
Somnath Ghosh
Co-existence and interplay between mesoscopic light dynamics with singular optics in spatially random but temporally coherent disordered waveguide lattices is reported. Two CW ligh…