Dr. Sanjib Dey

Inspire Faculty, Physical Sciences

Research Area:

Quantum optics & information theory, PT-symmetric non-Hermitian Hamiltonians, Open quantum systems, Theoretical physics

Research Focus:

I am a theoretical Physicist working mainly on the generalizations of quantum optical models and their applications in different areas including quantum information processing. It is a relatively new approach towards the understanding of a wider framework of quantum optics that can be implemented to arbitrary quantum mechanical potentials/models, such that the standard quantum optics emerges as a limiting theory. The study is governed by the generalization of some of the notions; like, coherence, nonclassicality, entanglement, etc. The formulations of non-Hermitian quantum mechanics play important roles in the study of such systems so that one can obtain self-consistent physical systems out of some nonphysical systems that may arise during the process. I am also working on the decoherence properties of some realistic systems using non-Hermitian Hamiltonians, especially the open quantum systems. Apart from some obvious applications on quantum information processing and computation, the generalized quantum optical models can be applied to systems like gravitational wave detection, signal analysis, etc. Currently, my study is focused on the search for realization of generalized quantum optical models in real life.

Selected Publications

•  K. Zelaya, S. Dey and V. Hussin, Generalized squeezed states, Physics Letters A 382, 3369-3375 (2018).

• S. Dey et al., Probing noncommutative theories with quantum optical experiments, Nuclear Physics B 924, 578-587 (2017).

• S. Dey and V. Hussin, Noncommutative q-photon-added coherent states, Physical Review A 93, 053824 (2016).

• S. Dey, q-deformed noncommutative cat states and their nonclassical properties, Physical Review D 91, 044024 (2015).

• S. Dey and V. Hussin, Entangled squeezed states in noncommutative spaces with minimal length uncertainty relations, Physical Review D 91, 124017 (2015).

• S. Dey and A. Fring, Bohmian quantum trajectories from coherent states, Physical Review A 88, 022116 (2013).

• S. Dey and A. Fring, Squeezed coherent states for noncommutative spaces with minimal length uncertainty relations, Physical Review D 86, 064038 (2012).