Publications (15)
Separating the output ports of a Bragg interferometer via velocity selective transport
Raphaël Piccon, Sumit Sarkar, Sébastien Merlet +1
We report on the study of a detection scheme based on a Bloch separator in two-photon Bragg interferometers. We increase the spatial separation between the two output ports of the…
A Quantum Algorithm Based Heuristic to Hide Sensitive Itemsets
Abhijeet Ghoshal, Yan Li, Syam Menon +1
Quantum devices use qubits to represent information, which allows them to exploit important properties from quantum physics, specifically superposition and entanglement. As a resul…
A simple atomic beam oven with a metal thermal break
Chetan Vishwakarma, Jay Mangaonkar, Kushal Patel +3
We report the design and construction of a simple, easy to machine high-temperature oven for generating an atomic beam in laser cooling experiments. This design eliminates the prob…
Using Tree-Decomposable Structures to Approximate Belief Networks
Sumit Sarkar
Tree structures have been shown to provide an efficient framework for propagating beliefs [Pearl,1986]. This paper studies the problem of finding an optimal approximating tree. The…
Unraveling the temperature-responsive charge-disproportionation in BaBiO
Sumit Sarkar, Priyanka Yadav, Sourav Chowdhury +2
This study shows that the charge disproportionation at the Bi site in BaBiO alters as a function of temperature. Decreasing the temperature from 300K down to 160K leads to a si…
Terrestrial Very-Long-Baseline Atom Interferometry: Summary of the Second Workshop
Adam Abdalla, Mahiro Abe, Sven Abend +307
This summary of the second Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Workshop provides a comprehensive overview of our meeting held in London in April 2024, build…
Competing s-p and p-p fluctuations in charge-disproportionation of BaBiO3
Sumit Sarkar, Ram Janay Choudhary, Rajamani Raghunathan
Here we investigate the mechanism of charge-disproportionation (CD) in BaBiO3 (BBO) using density functional theory under different crystal symmetries and by employing strain as an…
Role of local structural distortions on the origin of j=1/2 pseudo-spin state in sodium iridate
Priyanka Yadav, Sumit Sarkar, Manju Sharma +3
Na2IrO3 (NIO) is known to be a spin-orbit (SO) driven j=1/2 pseudo-spin Mott-Hubbard (M-H) insulator. However, the microscopic origin of the pseudo-spin state and the role of local…
Diffraction of a CW atom laser in the Raman-Nath regime
Sumit Sarkar, Jay Mangaonkar, Chetan Vishwakarma +1
Atom interferometry is the most successful technique for precision metrology. However, current interferometers using ultracold atoms allows one to probe the interference pattern on…
Bose-Einstein Condensation in an electro-pneumatically transformed quadrupole-Ioffe magnetic trap
Sunil Kumar, Sumit Sarkar, Gunjan Verma +3
We report a novel approach for preparing a Bose-Einstein condensate (BEC) of Rb atoms using electro-pneumatically driven transfer of atoms into a Quadrupole-Ioffe magnetic t…
Role of Disorder in Governing the Magnetic Properties of Cu2IrO3
Priyanka Yadav, Sumit Sarkar, Vishal Kumar +6
CuIrO is a honeycomb iridate which has been studied recently as a candidate Kitaev quantum spin liquid. Its magnetic ground state however, has been reported to be quantum d…
Non-monotonic diffusion rates in atom-optics Lévy kicked rotor
Sanku Paul, Sumit Sarkar, Chetan Vishwakarma +3
The dynamics of chaotic Hamiltonian systems such as the kicked rotor continues to guide our understanding of transport and localization processes. The localized states of the quant…
Non-exponential decoherence and subdiffusion in atom-optics kicked rotor
Sumit Sarkar, Sanku Paul, Chetan Vishwakarma +5
Quantum systems lose coherence upon interaction with the environment and tend towards classical states. Quantum coherence is known to exponentially decay in time so that macroscopi…
Role of electronic excitation on the anomalous magnetism of elemental Copper
Sudip Pal, Sumit Sarkar, Kranti Kumar +4
Magnetic susceptibility of elemental copper (Cu) shows an anomalous rise at low temperatures superimposed on the expected atypical diamagnetic response. Such temperature dependent…
Atom interferometry using temporal Talbot effect on a Bose-Einstein condensate
Jay Mangaonkar, Chetan Vishwakarma, S. Sagar Maurya +4
We experimentally investigate a uniform pulse sequence in which atom interference is realized using the temporal matter-wave Talbot effect in an atom-optic kicked rotor system. Mul…