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91 papers
Hilbert space fragmentation imposed real spectrum of non-Hermitian systems
Somsubhra Ghosh, K. Sengupta, Indranil Paul
We show that constraints imposed by strong Hilbert space fragmentation (HSF) along with the presence of certain global symmetries can ensure the reality of eigenspectra of non-Herm…
Non-equilibrium dynamics of bosons with dipole symmetry: Large- Keldysh approach
Md Mursalin Islam, K. Sengupta, Rajdeep Sensarma
We study the quench and the ramp dynamics of interacting -component charged bosons with dipole symmetry using Schwinger-Keldysh field theory in the large limit. The equilibr…
Detecting prethermal Floquet phases of Rydberg atom arrays
Somsubhra Ghosh, Diptiman Sen, K. Sengupta
We study the prethermal Floquet phases of a two-dimensional (2D) Rydberg atom array on a rectangular lattice in the presence of a periodic drive with large drive amplitude. We deri…
Prethermal fragmentation in a periodically driven Fermionic chain
Somsubhra Ghosh, Indranil Paul, K. Sengupta
We study a Fermionic chain with nearest-neighbor hopping and density-density interactions, where the nearest-neighbor interaction term is driven periodically. We show that such a d…
Emergent conservation in Floquet dynamics of integrable non-Hermitian models
Tista Banerjee, K. Sengupta
We study the dynamics of a class of integrable non-Hermitian free-fermionic models driven periodically using a continuous drive protocol characterized by an amplitude and fre…
Periodically driven model with quasiperiodic potential and staggered hopping amplitudes: engineering of mobility gaps and multifractal states
Sreemayee Aditya, K. Sengupta, Diptiman Sen
We study if periodic driving of a model with a quasiperiodic potential can generate interesting Floquet phases which have no counterparts in the static model. Specifically, we cons…