A Success Research Story

For more than a decade, Dr. Sankalpa Ghosh and his group at IIT Delhi have been associated with the theoretical investigation of the interaction of ultra-cold atomic vapour forming a Bose-Einstein Condensate with laser light to realize the idea of “Quantum Simulations”- a path breaking idea first proposed by Nobel Laureate Richard Feynman.

Such Quantum Simulation with ultra-cold atomic system is the focus research area of Ghosh and his research group. For example adjusting the interaction between laser beam and such charge neutral ultra cold atomic vapour it is possible to create an analogue of semiconductor structures subjected to high magnetic field.

His work on such ultra-cold atomic system was recognized by Department of Atomic Energy, Government of India through its DAE-SRC Outstanding Investigator Award. In this he received a fellowship and a generous project grant to further his research in this direction. This apart Ghosh also work on magnetotransport problem in low dimensional electron systems and recently finished a project with University of Bath, UK with support from UGC-UKIERI.

Ghosh’s research group suggested how by placing such ultra cold atomic vapour in between two mirrors and shining laser on them it is possible to observe a strange quantum oscillation which is otherwise only seen in a conducting metal when subjected to a high magnetic field at relatively low temperature. They were also able to predict interesting properties of a bizarre and counter-intuitive phase of matter called “Supersolid” which is crystalline like our common salt in structure, but flows without any friction like “superfluid Helium”.

His research collaborators was mostly his Ph.D. student Dr. Rashi Sachdeva ( now in Japan), Undergraduate and Masters project student Bikash Padhi and Adhip Agarwala and Dr. Jasleen Lugani, ( another Ph. D. student jointly supervised with Prof. K. Thyagarajan ). His current research group consists of three Ph.D. students and one Research Associate funded by MHRD, CSIR and DAE Fellowships.

With the DAE-SRC outstanding researcher grant Ghosh was able to hire a Research Associate and Ph.D. student to strengthen the research activity of cold atoms in his group. Currently they are looking for interesting quantum simulation with the help of ulra cold atomic system that has coupling between its extrinsic and intrinsic degrees of freedom, known as spin-orbit coupling.

A snapshot of the current research group of Dr. Sankalpa Ghosh ( taken on June, 2016)