IITKGP

Sonjoy Majumder

Professor

Physics

+91-3222-283808

sonjoym@phy.iitkgp.ac.in

Research Areas

  • Physics of ultra cold atom
  • Light matter interaction: Atomic clock
  • Quantum Information Theory
  • Relativistic many-electron theory
  • Quantum Computing and Machine Learning

Quantum many-body theories have been extensively used in our research work applied in atomic, molecular, and ultra-cold microscopic particles. Precision estimations of fundamental constants of nature, like, different electromagnetic and weak nuclear moments, weak charge using electronic transitions in atoms and molecules, are one of the thrust areas of modern research in science to probe the standard model of particle physics as well as precision improvement of atomic/molecular clocks. Estimating the astrophysical abundances of atomic and molecular species in both neutral or ionic forms using the precise electronic transitions are the other avenue of our research.
 

Over the last couple of years, our research is focused on the interaction of ultra-cold atoms and molecules with light, especially optical vortex. Our work shows the transfer mechanism of orbital angular momentum from light to matter, which is only consistent formalism with present-day experiments. Our proposed experimental technique to estimate the value and orientation of matter vortex without collapsing the quantum state is taken up by an eminent experimental laboratory around the world. Further, we study the non-linear dynamics in the ultra-cold systems and propose to estimate some physical parameters by observing instability patterns in Bose-Einstein condensation.

  • Spontaneous Formation of Star-Shaped Surface Patterns in a Driven Bose-Einstein Condensate K., Mukherjee K. , Huh S. , Kim K. , Mistakidis S. , Maity D. K., Kevrekidis P. , Majumder S. , Schmelcher P. , Choi J. By Physical Review Letters 127 1130011-1130017 (2021)
  • Ab initio relativistic many-body calculation of hyperfine splittings of Cd 113+ G Dixit, HS Nataraj, BK Sahoo, RK Chaudhuri, S Majumder By Physical Review A 77 - (2008)
  • Vector polarizability of an atomic state induced by a linearly polarized vortex beam: External control of magic, tune-out wavelengths, and heteronuclear spin oscillations Bhowmik A., Dutta N. N., Majumder S. By Physical Review A 102 063116-10 (2020)
  • Parametrically excited star-shaped patterns at the interface of binary Bose-Einstein condensates Maity D.K., Mukherjee K., Mistakidis S.I., Das S., Kevrekidis P.G., Majumder S., Schmelcher P. By Physical Review A 102 - (2020)
  • Tunable magic wavelengths for trapping with focused Laguerre-Gaussian beams Bhowmik A., Dutta N. N., Majumder S. By Physical Review A 97 022511-1-022511-12 (2018)
  • Interaction of atom with nonparaxial Laguerre-Gaussian beam: Forming superposition of vortex states in Bose-Einstein condensates Bhowmik A., Mondal P. K., Majumder S. , Deb B. By Physical Review A 93 0638521-0638526 (2016)
  • Ab initio calculations of the isotope shift for the first three elements of the K isoelectronic sequence Sourav Roy and Sonjoy Majumder By Physical Review A 92 - (2015)
  • Optical manipulation of matter-wave vortices: An analog of circular dichroism Pradip Kumar Mondal, Bimalendu Deb, and Sonjoy Majumder By Physical Review A 92 - (2015)
  • Angular Momentum Transfer in Interaction of Laguerre-Gaussian Beams with Atoms and Molecules Pradip Kumar Mondal, Bimalendu Deb, and Sonjoy Majumder By Physical Review A 89 - (2014)
  • E1- PNC transition amplitudes of the hyperfine components for $^2S_{1/2}$ $-$ $^2D_{3/2}$ transitions of $^{137}$Ba$^{+}$ and $^{87}$Sr$^{+}$ Narendra Nath Dutta and Sonjoy Majumder By Physical Review A 90 - (2014)
  • Co-Principal Investigator

Ph. D. Students

Anirban Ghosh

Area of Research: light-matter interaction

Arpana Saboo

Area of Research: light-matter interaction

Deepu Singh

Area of Research: atomic, molecular and optical physics

Hari Sadhan Ghosh

Area of Research: light-matter interaction

Harshdeep Singh

Area of Research: Quantum Computing

Ranit Bose

Area of Research: atomic, molecular and optical physics

Sabyasachi Chakraborty

Area of Research: Quantum Computing

Sabyasachi Mukhopadhyay

Area of Research: Bio-photonics

Shainee Hazra

Area of Research: Multiferroics

Soumyadeep Halder

Area of Research: Light-matter interaction

Tanima Mondal

Area of Research: High Energy Astrophysics