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Urbasi Sinha
Associate Professor II
Office phone: 948083 6150
Email : usinha
Webpage : https://sites.google.com/site/urbasisinha/

• Vision
• Research Areas
• Members
• Publications
• PhD Students
The main thrust of our lab is in research on aspects of quantum information and quantum computation. Our systems of choice at the moment are qutrits, based on spatial degrees of freedom of the single photon. Our lab is one of the first labs in the country to develop the technology of single photon sources based on spontaneous parametric down conversion in bulk non-linear crystals. We use the single photons and their various degrees of freedom to investigate aspects of quantum optics and quantum information. Quantum mechanics is a cornerstone of modern physics. Just as the 19th century was called the Machine Age and the 20th century the Information Age, the 21st century promises to go down in history as the Quantum Age. However, can we really claim to fully understand quantum mechanical principles? How much do we really believe of what we know? Answers to such questions require us to revisit the fundamental postulates of quantum mechanics and perform precision theoretical and experimental investigations to come up with the right bounds. In our group, a part of our focus is to attempt such investigations using single photons as our tools. Such tests carry a lot of importance in the current theoretical physics scenario where a lot of importance is being given to unification of quantum mechanics and general relativity. Such unification attempts would also be benefited if one can have a more precise understanding of the principles involved in at least one of the theories i.e. quantum mechanics. In the near future, we wish to enter the domain of quantum communication and develop both terrestrial and satellite based technologies for the same.
Selected publications
1 Non-classical paths in Quantum interference experiments,
Physical Review Letters, Vol. 113, 120406, 2014.
2 Playing the Aharon Vaidman Quantum game using a Young type photonic qutrit,
Physical Review A, Vol. 86, 012321, 2012.
3 Ruling out Multi-order interference in Quantum Mechanics,
Science, Vol. 329, 418, 2010.
4 Temperature dependent electron mobility in InAs nanowires,
Nanotechnology, Vol.24, 225202, 2013.
5 Effect of environmental coupling on tunneling of quasi-particles in Josephson junctions,
Superconductor Science and Technology, Vol.26 (12), 125013, 2013