Dr. Arvind
Professor , Physical Sciences

I am a theoretical physicist whose research interests span the areas of quantum information processing, quantum optics, foundations of quantum mechanics and research in physics education.

Quantum Computing: Characterising quantum entanglement and tracing its exact role in quantum algorithms remains a challenging open problem. I have worked on issues related to quantum entanglement in the context of the Deutsch-Jozsa algorithm and Parity Determining algorithm, quantum dissipation and its control, optical schemes for quantum computers and NMR implementations of quantum information processors. My current research interests in quantum information include characterisation of bound state entanglement, role of entanglement in quantum computation, quantum crytography and physical implementations of quantum computers.

Foundations of QM: I have also been working on connection of Bell's inequalities with non-classicality of states of the radiation field, formulation of Bell's inequalities for multi-photon sources, geometric phases in quantum mechanics, different approaches to the quantum measurement problem and in particular understanding weak measurements.

Quantum Optics: My research in quantum optics includes signatures of non-classical behaviour for the radiation field such as squeezing, subpoissonian photon statistics and antibunching, and application of group theoretic methods in quantum optics.

Physics Education: I am working on building new experiments for physics teaching which are designed around a certain conceptual theme. Experiments developed so far include random sampling of an AC source with a DC meter, a demonstration of Coriolis force, normal modes and symmetry breaking in a 2D pendulum using a single oscillator, and a quantitative study of ion diffusion.

• Extremal extensions of entanglement witnesses: Finding new bound entangled states, Ritabrata Sengupta and Arvind, Phys. Rev. A, 84(3), 032328,1-7 September 2011.
  
• Simulating a single-qubit channel using a mixed-state environment by Geetu Narang and Arvind. Phys. Rev. A 75(3), 032305,1-7 March 2007.
  
• Scaling issues in ensemble implementations of the deutsch-jozsa algorithm by Arvind and David Collins. Phys. Rev. A, 68(5):052301 1-4, November 2003.
  
• Quantum entanglement and quantum computational alrgorithms by Arvind. Pramana Jr. of Physics, 56(2-3):357-365, Feb-Mar 2001.
  
• Two-mode quantum systems: Invariant classification of squeezing transformations and squeezed states by Arvind, B. Dutta, R. Simon, and N. Mukunda Phys. Rev. A, 52(2):1609-1620, August 1995.