89 citations · 922 across the 49 of their papers we have counts for
4 papers · 1 filter
On the construction of pseudo-hermitian quantum system with a pre-determined metric in the Hilbert space
Pijush K. Ghosh
A class of pseudo-hermitian quantum system with an explicit form of the positive-definite metric in the Hilbert space is presented. The general method involves a realization of the…
Exactly Solvable Quasi-hermitian Transverse Ising Model
Tetsuo Deguchi, Pijush K. Ghosh
A non-hermitian deformation of the one-dimensional transverse Ising model is shown to have the property of quasi-hermiticity. The transverse Ising chain is obtained from the starti…
Level statistics of a pseudo-Hermitian Dicke model
Tetsuo Deguchi, Pijush K. Ghosh, Kazue Kudo
A non-Hermitian operator that is related to its adjoint through a similarity transformation is defined as a pseudo-Hermitian operator. We study the level-statistics of a pseudo-Her…
Quantum Phase Transition in a Pseudo-hermitian Dicke model
Tetsuo Deguchi, Pijush K. Ghosh
We show that a Dicke-type pseudo-hermitian Hamiltonian undergoes quantum phase transition by mapping it to the "Dressed Dicke Model" through a similarity transformation. We find th…