16 citations · 42 across the 15 of their papers we have counts for
15 papers
Spatio-temporal Monte Carlo modeling of loading and decay dynamics in an optical dipole trap
Sankalp Shandilya, Gunjan Verma, Kavish Bhardwaj +3
Here, we present our studies on intra-trap dynamics of an optical dipole trap (ODT) loaded from a Magneto-optical trap (MOT) of Rb atoms. A spatio-temporal Monte Carlo (MC)…
On damping of Rabi oscillations in two-photon Raman excitation in cold Rb atoms
Vijay Kumar, S. P. Ram, S. Singh +3
Two-photon Raman excitation between the ground hyperfine states and of Rb atom has been experimentally studied.…
Measurement of gravitational acceleration in a single laser operated atomic fountain
Kavish Bhardwaj, S. Singh, S. P. Ram +6
We present measurements on Earth's gravitational acceleration (g) using an in-house developed cold atom gravimeter (CAG) in an atomic fountain geometry. In the setup, the laser coo…
On trapping geometry for cold atoms in a radio-frequency (rf) dressed potential
Sourabh Sarkar, S. P. Ram, Kavish Bhardwaj +3
We have investigated the atom trapping geometry for trapping of atoms in a radio-frequency (rf) dressed potential generated after superposing a strong linearly polarize…
A compact setup for loading magneto-optical trap in ultrahigh vacuum environment
Kavish Bharadwaj, Sourabh Sarkar, S. P. Ram +2
We have developed a compact setup which enables loading a magneto-optical trap (MOT) in ultra-high vacuum (UHV) environment. Nearly atoms of are trapped…
Different atom trapping geometries with time averaged adiabatic potentials
Sourabh Sarkar, S. P. Ram, V. B. Tiwari +1
In this article, we have theoretically studied the time averaged adiabatic potential (TAAP) scheme for realizing different atom trapping geometries. It is shown that by varying tim…
Effect of AC-Stark shift in optical dipole trap on absorption imaging of trapped atoms
K Bhardwaj, S P Ram, S Singh +2
In the present work, the effect of AC-Stark shift (i.e. light-shift) in optical dipole trap on in-situ absorption probe imaging of the trapped atoms has been investigated. We have…
Observation of dual electromagnetically induced transparencies in cold atoms
Charu Mishra, A. Chakraborty, S. P. Ram +3
We have observed two dual electromagnetically induced transparency (EIT) spectra in probe transmission through cold atoms trapped in a magneto-optical trap (MOT). These d…
Coupling field dependent quantum interference effects in a -system of atom
Charu Mishra, A. Chakraborty, Vivek Singh +3
A -system in line transition of the atom has been investigated for quantum interference effects for different configurations of coupling field. With a travelling…
Electromagnetically Induced Transparency in -systems of atom in magnetic field
Charu Mishra, A. Chakraborty, A. Srivastava +4
The electromagnetically induced transparency (EIT) observations in two -systems of atom, $|5^{2}S_{1/2} F=1\rangle \rightarrow |5^{2}P_{3/2} F'=1\rangle \leftarrow |5^…
Dependence of in-situ Bose condensate size on frequency of RF-field used for evaporative cooling
S. R. Mishra, S. P. Ram, S. K. Tiwari +1
We report the results of in-situ characterization of Rb atom cloud in a quadrupole Ioffe configuration (QUIC) magnetic trap after radio frequency (RF) evaporative cooling o…
A study on evolution of a cold atom cloud in a time dependent radio frequency dressed potential
A. Chakraborty, S. R. Mishra, S. P. Ram +2
Using a Direct Simulation Monte Carlo technique, we have studied the time evolution of a cold atom cloud interacting with a time dependent radio frequency (rf) dressed state potent…
A toroidal trap for cold atoms using an rf-dressed quadrupole trap
A. Chakraborty, S. R. Mishra, S. P. Ram +2
We demonstrate the trapping of cold atoms in a toroidal geometry using a radio frequency (rf) dressed quadrupole magnetic trap formed by superposing a strong rf-field on…
Temperature and phase-space density of cold atom cloud in a quadrupole magnetic trap
S. P. Ram, S. R. Mishra, S. K. Tiwari +1
We present studies on the modifications in temperature, number density and phase-space density when a laser cooled atom cloud from the optical molasses is trapped in a quadrupole m…
Improved transfer efficiency with pulsed atom transfer between two magneto-optical traps
S P Ram, S K Tiwari, S R Mishra
In our double magneto-optical trap (MOT) setup containing a vapor chamber MOT (VC-MOT) and an ultra high vacuum MOT (UHV-MOT) for Rb atoms, we find that transfer of atoms fr…