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Department of Physics
Bhaskar Kaviraj
Assistant Professor,
Department of Physics,
School of Natural Sciences
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Education Details
PhD (2007), Supervisor: Prof. S.K. Ghatak, Department of Physics, Indian Institute of Technology, Kharagpur, India
MSc (2001) Department of Physics, Jadavpur University, India
BSc (1999), Department of Physics, Burdwan University, India
Professional Experience
Assistant Professor, Department of Physics, School of Natural Sciences, Shiv Nadar University, December 2013.

Visiting Faculty, Department of Physics, Indian Institute of Science Education and Research (IISER), Bhopal, July 2013 - November 2013.

Research Associate, International Center of Materials Nanoarchitectonics (MANA), National Institute of Materials Science, Tsukuba, Japan, February 2011 - January 2013.

Research Engineer, Institute of Nanoscience and Cryogenics (INAC), Department of Statistical Physics, Magnetism and Superconductivity (SPSMS), French Atomic Energy Commission (CEA), Grenoble, France, January 2009- January 2011.

Research Associate, Department of Physics, Georgia State University, USA, January 2008 - December - 2008.

Post-doctoral Researcher, Laboratory of Electrical Engineering in Paris (LGEP), Ecole Superieure d’electricite (Supelec), France, January 2007 - December 2007.
Research Interests
We work in the field of electronic quantum transport in mesoscopic systems. Mesoscopic systems are intermediate to that of microscopic (atomic) and macroscopic systems where quantum coherence is observed. The goal of the research is towards building up of devices that finds use in quantum information processing (QIP). Two fundamental quantum phenomena are important to realize devices for QIP, they are non-locality and entanglement. Non-locality refers to the existence of quantum correlations in spatially separated parts of a quantum system. A fundamental route for the exploration of this phenomenon is the generation of Einstein-Podolsky-Rosen (EPR) pairs of quantum entangled objects. Such pairs of quantum entangled objects has already been tested for photons but not yet for massive particles, like electrons as it is extremely difficult to obtain entangled electrons because electrons are immersed in a macroscopic ground state- the Fermi Sea - which prevents the straightforward generation and splitting of entangled electron pairs. The challenge can be faced by, first using a superconducting material that consists of a Cooper pair spin-singlet state as its ground state and second, by using semiconductor quantum dots in Coulomb blockade regime connected to a superconductor that would force to split the spin-entangled electrons coming out of the superconductor, and thus we would have an on-demand generation of spin-entangled electrons. Such creation of non-local quantum-entangled states in solid state devices would be exploited for secure quantum communication, quantum teleportation and to perform Bell inequality tests- a direct proof of entanglement which has yet to be produced for fermionic particles. The non-locality and entanglement would be probed by a unique set-up that would measure noise cross-correlations, a technique that is very sensitive to measure quantum correlations. The devices would also be probed by conventional transport measurements where interesting physics would also be investigated at superconductor-quantum dot junctions, for example Andreev Bound States, Crossed Andreev Reflection and Elastic Cotunneling. A major part of the challenge involves careful preparation of samples which requires a cleanroom facility. Electron beam lithography, AFM, electron beam evaporator would be the commonly used instruments to fabricate the samples and make electrical contacts.
Select Publications
Noise Correlations in Three-Terminal Diffusive Superconductor-Normal Metal-Superconductor Nanostructures - B. Kaviraj, O. Coupiac, H. Courtois and F. Lefloch Physical Review Letters 107 (2011) 077005.

SQUIDs based set-up for probing current noise and correlations in three-terminal devices - A. Pfeffer, B. Kaviraj, O. Coupiac and F. Lefloch Review of Scientific Instruments 83 115107 (2012)

Realisation of micro-patterned multi-element magneto-impedance sensors for non-destructive applications - J. Moulin, F. Alves, B. Kaviraj et al. Sensor Letters 7 (2009) 272-275.

Giant magneto-impedance in finement/copper/finemet based trilayer structures - B.Kaviraj, F.Alves Physica B, 403 (2008) 1937-1941

Very large magneto-impedance and its scaling behavior in amorphous Fe73.5Nb3Cu1Si13.5B9 ribbon - B.Kaviraj and S.K.Ghatak Physica B 403 (2008) 1731-1737

Performances of a newly high sensitive trilayer F/Cu/F GMI sensor - F. Alves, L. Abi Rached, J.Moutoussamy, C. Colliot and B.Kaviraj Sensors and Actuators A 145-146 (2008) 241-244

Influence of stress on magneto-impedance in Co71-xFexCr7Si8B14 amorphous ribbons - B.Kaviraj and S.K.Ghatak Journal of Materials Processing and Technology 202 (2008) 119-124

Giant magnetoimpedance in Ag-doped La0.7Sr0.3MnO3 - S.K.Ghatak, B.Kaviraj, T.K Dey, Journal of Applied Physics 101 (2007), 023910-023915

Simulation of stress-impedance effects in low magnetostrictive films - B.Kaviraj and S.K.Ghatak Journal of Non-crystalline Solids 353, (2007) 1515-1520

Anisotropic dependence of Giant Magneto-impedance of amorphous ferromagnetic ribbon on biasing field- B.Kaviraj and S.K.Ghatak International journal for Modern Physics B 21 (2007) 3859-386

Influence of microwave annealing on GMI response and magnetization of amorphous Fe73.5Nb3Cu1Si13.5B9 ribbon - B.Kaviraj and S.K.Ghatak Solid State Communications 140 (2006) 294-298
National and International Recognition
Selected as a post-doctoral fellow under ANR (Agence Nationale de la recherche), the French National research Agency in 2007 to work at Supelec, Paris, France.

Selected as a research engineer under ANR (Agence Nationale de la recherche), the French National research Agency in 2009 to work at CEA-Grenoble, France.

Qualified National Eligibility Test (NET) in Physics in 2001 for eligibility as Lecturers in Indian Government Colleges and Universities

Qualified Graduate Aptitude Test in Engineering (GATE) in Physics in 2002 for admission to PhD programme at various Indian Institutes of Technology

Qualified Joint Entrance Screening Test (JEST) in 2002 for admissions to national research Institutes for carrying out PhD programme.

Qualified for CSIR SRF 2006 for Senior Research Fellow.

Qualified for Research and Teaching Assistantship at Indian institute of Technology, Kharagpur for persuing PhD in the Department of Physics
Executive Summary
Dr. Bhaskar Kaviraj completed his PhD from IIT Kharagpur in 2007. After his PhD degree, he worked as post-doctoral researcher during 2007 in the Laboratory of Electrical Engineering in Paris (LGEP), Paris under the organization SUPELEC. Then he moved to Georgia State University, Atlanta, USA in 2008 where he worked in electronic transport properties of low-dimensional systems as a Post-doctoral Research Associate. In 2009, he joined French Atomic Energy Commission (CEA) in Grenoble, France as a Research Engineer to work in mesoscopic systems and quantum shot noise and cross-correlations in superconducting hybrid nanostructures. In 2011, he moved to International Center for Materials Nanoarchitectonics (MANA) under the aegis of National Institute of Materials Science (NIMS), Tsukuba, Japan to carry out research in superconductor-quantum dot hybrid systems before joining as a Visiting Faculty at Indian Institute of Science Education and Research (IISER), Bhopal. His present research interests include investigations of Quantum transport properties in mesoscopic systems, Quantum Shot noise and cross-correlations at mesoscopic scale and electronic transport properties of superconducting hybrid nanostructures involving superconductor-normal metal and superconductor quantum dot junctions. He has presented his research work in various international seminars and workshops in France, USA, Japan and India.
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