2.8k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Indian Institute of Science BangaloreIN70 papers
- Saha Institute of Nuclear PhysicsIN59 papers
- Harish-Chandra Research InstituteIN57 papers
- S.N. Bose National Centre for Basic SciencesIN51 papers
- Tata Institute of Fundamental ResearchIN44 papers
- Inter-University Centre for Astronomy and AstrophysicsIN42 papers
- Homi Bhabha National InstituteIN28 papers
- Indian Institute of Science Education and Research KolkataIN28 papers
- Centre National de la Recherche ScientifiqueFR27 papers
- Indian Institute of Technology KanpurIN27 papers
- Max Planck Institute for the Physics of Complex SystemsDE23 papers
- Indian Institute of AstrophysicsIN21 papers
56 papers · 1 filter
Phase diffusion and fluctuations in a dissipative Bose-Josephson junction
Abhik Kumar Saha, Deb Shankar Ray, Bimalendu Deb
We analyze the phase diffusion, quantum fluctuations and their spectral features of an one-dimensional Bose-Josephson junction (BJJ) coupled to a bosonic heat bath. We show the dep…
Time- and frequency-domain two-particle correlations of a driven dissipative Bose-Hubbard model
Kingshuk Adhikary, Anushree Dey, Arpita Pal +2
We theoretically investigate the time- and frequency-domain two-particle correlations of a driven dissipative Bose-Hubbard model (BHM) at and near a dissipative phase transition (D…
Modeling atom-atom interactions at low energy by Jost-Kohn potentials
Subhanka Mal, Kingshuk Adhikary, Dibyendu Sardar +2
More than 65 years ago, Jost and Kohn [R. Jost and W. Kohn, {Phys. Rev.} {\bf 87}, 977 (1952)] derived an explicit expression for a class of short-range model potentials from a giv…
The effects of trap-confinement and interatomic interactions on Josephson effects and macroscopic quantum self-trapping for a Bose-Einstein Condensate
Abhik Kumar Saha, Kingshuk Adhikary, Subhanka Mal +2
We theoretically study the effects of trap-confinement and interatomic interactions on Josephson oscillations (JO) and macroscopic quantum self-trapping (MQST) for a Bose-Einstein…
Structure, spectroscopy and cold collisions of the (SrNa) ionic system
Sana Bellaouini, Arpita Pal, Arpita Rakshit +3
We perform a study on extended adiabatic potential energy curves of nearly 38 states of 1,3, 1,3 and 1,3 symmetries for the (SrNa) ion, though only the ground and fi…
Spectroscopic properties of the molecular ions BeX^+ (X=Na, K, Rb): Forming cold molecular ions from an ion-atom mixture by stimulated Raman adiabatic process
Hela Ladjimi, Dibyendu Sardar, Mohamed Farjallah +5
In this theoretical work, we calculate potential energy curves, spectroscopic pa- rameters and transition dipole moments of molecular ions BeX^+ (X=Na, K, Rb) composed of alkaline…
Photon-photon correlations with a V-type three-level system interacting with two quantized field modes
Arpita Pal, Bimalendu Deb
We carry out a model study on the interaction of a -type three-level emitter with two quantized cavity modes which are weakly driven by two classical fields. The emitter may be…
Density profiles of two-component Bose-Einstein condensates interacting with a Laguerre-Gaussian Beam
Anal Bhowmik, Pradip Kumar Mondal, Sonjoy Majumder +1
The density profiles of trapped two-component Bose-Einstein condensates (BEC) and its microscopic interaction with Laguerre Gaussian (LG) beam are studied. We consider the R…
A model study on a pair of trapped particles interacting with an arbitrary effective range
Partha Goswami, Bimalendu Deb
We study the effects of the effective range of interaction on the eigenvalues and eigenstates of two particles confined in a three-dimensional (3D) isotropic as well as one- or qua…
Interaction of atom with non-paraxial Laguerre-Gaussian beam:Forming superposition of vortex states in Bose-Einstein condensates
Anal Bhowmik, Pradip Kumar Mondal, Sonjoy Majumder +1
The exchange of orbital angular momentum (OAM) between paraxial optical vortex and a Bose-Einstein condensate (BEC) of atomic gases is well known. In this paper, we develop a theor…
Positronium impact ionization of Alkali atoms
D. Ghosh, C. Sinha
Target ionization processes of alkali atoms by Positronium impact are investigated. Calculations are performed in the frame work of model potential formalism using the Coulomb dist…
Electronic structure of helium atom in a quantum dot
Jayanta K. Saha, S. Bhattacharyya, T. K. Mukherjee
Bound and resonance states of helium atom have been investigated inside a quantum dot by using explicitly correlated Hylleraas type basis set within the framework of stabilization…
Interactions and low energy collisions between an alkali ion and an alkali atom of different nucleus
Arpita Rakshit, Chedli Ghanmi, Hamid Berriche +1
We study theoretically interaction potentials and low energy collisions between different alkali atoms and alkali ions. Specifically, we consider systems like X + Y, where X(…
Ab-initio calculations on two-electron ions in strongly coupled plasma environment
S. Bhattacharyya, J. K. Saha, T. K. Mukherjee
In this work, the controversy between the interpretations of recent measurements on dense aluminum plasma created with Linac coherent light sources (LCLS) X-ray free electron laser…
Precise energy eigenvalues of hydrogen-like ion moving in quantum plasmas
S. Dutta, J. K. Saha, T. K. Mukherjee
The analytic form of the electrostatic potential felt by a slowly moving test charge in quantum plasma is being derived. It has been shown that the potential composed of two parts:…
The optical manipulation of matter-wave vortices: An analogue of circular dichroism
Pradip Kumar Mondal, Bimalendu Deb, Sonjoy Majumder
The transfer of orbital angular momentum from an optical vortex to an atomic Bose-Einstein condensate changes the vorticity of the condensate. The spatial mismatch between initial…
Optical Feshbach resonances through a molecular dark state: Efficient manipulation of -wave resonances in fermionic Yb atoms
Subrata Saha, Arpita Rakshit, Debashree Chakraborty +2
In a recent experiment by Yamazaki {\it et al.} [Phys.Rev. A {\bf 87} 010704 (R) (2013) ], -wave optical Feshbach resonance in fermionic Yb atoms using purely long-range…
SeD Radical: A probe for measurement of time variation of Fine Structure Constant() and Proton to Electron Mass Ratio()
Gaurab Ganguly, Avijit Sen, Manas Mukherjee +1
Based on the spectroscopic constants derived from highly accurate potential energy surfaces, the SeD radical is identified as a spectroscopic probe for measuring spatial and tempor…
Angular Momentum Transfer in Interaction of Laguerre-Gaussian Beams with Atoms and Molecules
Pradip Kumar Mondal, Bimalendu Deb, Sonjoy Majumder
Exchange of orbital angular momentum between Laguerre-Gaussian beam of light and center-of-mass motion of an atom or molecule is well known. We show that orbital angular momentum o…
A model study on atom-atom interactions with large scattering length in quasi-two dimensional traps
Partha Goswami, Arpita Rakshit, Bimalendu Deb
We carry out a model study on two-atom interactions and bound states in quasi-two dimensional traps. The interactions are modeled by two-parameter potentials with parameters being…
Decay dynamics in a strongly driven atom-molecule coupled system
Arpita Rakshit, Saikat Ghosh, Bimalendu Deb
Within the framework of master equation, we study decay dynamics of an atom-molecule system strongly coupled by two photoassociation lasers. Summing over the infinite number of ele…
Effects of a static electric field on two-color photoassociation between different atoms
Debashree Chakraborty, Bimalendu Deb
We study non-perturbative effects of a static electric field on two-color photoassociation of different atoms. A static electric field induces anisotropy in scattering between two…
Dynamics of ion cloud in a linear Paul trap
P. Mandal, M. Mukherjee
A linear ion trap setup has been developed for studying the dynamics of trapped ion cloud and thereby realizing possible systematics of a high precision measurement on a single ion…
Space charge and collective oscillation of ion cloud in a linear Paul trap
P. Mandal, S. Das, D. De Munshi +2
The presence of charged particles in an ion trap modifies the harmonic trapping potential in which they are trapped, leading to observed shifts in secular frequency as well as appe…