101 citations · 870 across the 32 of their papers we have counts for
11 papers · 1 filter
Boundary exceptional point driven chiral switch of topological edge states
Bikashkali Midya, Barsa Rani Sahu
We theoretically investigate the interplay of topology and localized non-Hermiticity in a finite Su-Schrieffer-Heeger chain characterized by non-Hermitian potentials at its boundar…
Non-Hermiticity induced thermal entanglement phase transition
Bikashkali Midya
Theoretical analysis of a prototypical two-qubit effective non-Hermitian system characterized by asymmetric Heisenberg interactions in the absence of external magnetic fields…
Gain-loss-induced non-Abelian Bloch braids
B. Midya
Onsite gain-loss-induced topological braiding principle of non-Hermitian energy bands is theoretically formulated in multiband lattice models with Hermitian hopping amplitudes. Bra…
Supersymmetric inversion of effective-range expansions
Bikashkali Midya, Jérémie Evrard, Sylvain Abramowicz +2
A complete and consistent inversion technique is proposed to derive an accurate interaction potential from an effective-range function for a given partial wave in the neutral case.…
Analytical stable Gaussian soliton supported by a parity-time-symmetric potential with power-law nonlinearity
Bikashkali Midya
We address the existence and stability of spatial localized modes supported by a parity-time-symmetric complex potential in the presence of power-law nonlinearity. The analytical e…
Nonlinear localized modes in PT-symmetric Rosen-Morse potential well
Bikashkali Midya, Rajkumar Roychoudhury
We report the existence and properties of localized modes described by nonlinear Schroedinger equation with complex PT-symmetric Rosen-Morse potential well. Exact analytical expres…
Nonsingular potentials from excited state factorization of a quantum system with position dependent mass
Bikashkali Midya
The modified factorization technique of a quantum system characterized by position-dependent mass Hamiltonian is presented. It has been shown that the singular superpotential defin…
Non-isospectrality of the generalized Swanson Hamiltonian and harmonic oscillator
Bikashkali Midya, Partha Pratim Dube, Rajkumar Roychoudhury
The generalized Swanson Hamiltonian with , can be transformed into an equiva…
A note on the PT-invariant periodic potential V(x)=4 cos^2 x + 4 i V_0 sin 2x
Bikashkali Midya, Barnana Roy, Rajkumar Roychoudhury
It is shown that the PT symmetric Hamiltonian with the periodic potential V(x) = 4 cos^2 x + 4 i V_0 sin 2x can be mapped into a Hermitian Hamiltonian for , by a similarit…
A generalized quantum nonlinear oscillator
Bikashkali Midya, Barnana Roy
We examine various generalizations, e.g. exactly solvable, quasi-exactly solvable and non-Hermitian variants, of a quantum nonlinear oscillator. For all these cases, the same mass…
Exceptional orthogonal polynomials and exactly solvable potentials in position dependent mass Schroedinger Hamiltonians
Bikashkali Midya, Barnana Roy
Some exactly solvable potentials in the position dependent mass background are generated whose bound states are given in terms of Laguerre- or Jacobi-type exceptional orthogo…