“A Comprehensive Approach to Determining Molecular Inelastic Rate Constants” Denuwan Vithanage, and Brian Stewart, Poster, APS Division of Atomic, Molecular and Optical Physics (DAMOP 2025), Portland, Oregon, June 16-20, 2025.
“Detailed Balance as an Internal Consistency Check for Molecular Collision Studies” Denuwan Vithanage, Jimmy Clifford, Othmane El Houssi, and Brian Stewart, Poster, APS Division of Atomic, Molecular and Optical Physics (DAMOP 2024), Fort Worth, Texas, June 03-07, 2024.
“Fast Quantum Control of Trapped 87Rb Bose-Einstein Condensates” Denuwan Vithanage, Skyler Wright, E. Carlo Samson, Poster, APS Division of Atomic, Molecular and Optical Physics (DAMOP 2020), Portland, Oregon, June 01-05, 2020.
“Fast Quantum Control of Trapped 87Rb Bose-Einstein Condensates” Denuwan Vithanage, Skyler Wright, E. Carlo Samson, Poster, Southwest Quantum Information and Technology(SQuInt 2020), Eugene, Oregon, February 08-10, 2020.
We present numerical simulations on manipulating Bose-Einstein condensates (BECs) at a fast rate while maintaining the coherence properties of its initial quantum state. The main problem in transporting a quantum system like a BEC at a fast rate is that the energy we add to the system for transport will change the BEC’s initial state or completely destroy the BEC. Two-dimensional (2D) simulations of BEC transport are performed by numerically solving the Gross-Pitaevskii equation (GPE) using a split-step Fourier method. In our simulations, we use trapping potentials in the form of painted potentials because it is possible to achieve arbitrary, dynamic traps with this method. In order to achieve high quantum fidelity, we use shortcuts-to-adiabaticity (STA) for high-speed BEC transport.. With these simulations, we compare different time intervals for a particular spatial displacement that a BEC can travel while keeping high quantum fidelity using experimentally feasible parameters.
“Fast Quantum Control of Trapped 87Rb Bose-Einstein Condensates: A Numerical Study” Denuwan Vithanage, Skyler Wright, Junjiang Li, E. Carlo Samson, Poster, Midwest Cold Atom Workshop (MCAW 2019), Northwestern University, Evanston, IL, November 02, 2019.
“Fast Quantum Control of Trapped 87Rb Bose-Einstein Condensates: A Numerical Study” Denuwan Vithanage, Skyler Wright, Junjiang Li, E. Carlo Samson, Poster, 11th annual Graduate Research Forum, Miami University, Oxford, Ohio, November 01, 2019
Abstract
We present numerical simulations to manipulate Bose-Einstein condensates (BECs) in a fast rate, while maintaining the coherence properties of its initial quantum state. Specifically, the objective is to quickly transport a trapped BEC along a specific distance in a short amount of time using painted potentials. We are using shortcuts-to-adiabaticity (STA) to keep high fidelity while high-speed transport occurs. 2D simulations of BEC transport are achieved by numerically solving the Gross-Pitaevskii equation (GPE) using a split-step Fourier method. With these simulations, we compared different spatial displacements that a BEC can travel while keeping high quantum fidelity using experimentally feasible parameters.
“Fast Quantum Control of Trapped 87Rb Bose-Einstein Condensates: A Numerical Study” Denuwan Vithanage, Skyler Wright, E. Carlo Samson, Poster, OSAPS Fall 2019, Kettering University, Flint, Michigan, October 11-12, 2019.
“Breast density on mammography as a predictor of breast cancer: A Sri Lankan experience” Hettiarachchi G.B., Perera D., Vithanage D.K.A., Kumarasiri P.V.R., Meegoda W., Uyangoda D., Hewavithana P.B., Poster, 9th International Breast Density & Cancer Risk Assessment Workshop, Prince Waikīkī , Oʻahu, HI, June 5-7, 2019.
Participation
- Midwest Cold Atom Workshop (MCAW 2018), the University of Illinois at Urbana-Champaign, November 10 – 11, 2018,
- PGIS research congress (ResCom 2015), Postgraduate Institute of Science (PGIS) of University of Peradeniya, October 9-10, 2015.
- 1st International Conference on Astrobiology, Senate House, University of Peradeniya, August 21-22, 2015.
- Thin film solar cells and their science and technology, Postgraduate Institute of Science (PGIS) of University of Peradeniya, February 27-28, 2015.