Dr. Prodyot Kumar Roy, Reader and Head
pr.phys@presidencycollegekolkata.ac.in, pkpresi@yahoo.co.in
Area of Specialisation: Dynamical systems, Chaotic electronic osci-llator, Studies on chaotic oscillation in external cavity diode laser  

Academic Profile
M.Sc. , North Bengal University (First Class First), 1975
Ph.D., (I.A.C.S.) University of Calcutta, 1985

Area of Interest
Dynamical systems, Chaotic electronic oscillator, Studies on chaotic oscillation in external cavity diode laser

Ongoing Research Projects
UGC minor project: Project Title: Studies on electronic chaotic oscillator. Research project entitled "Experiment on Chaotic Synchronization in Semiconductor Laser and its Potential in Secure Communication" was sanctioned by Board of Research in Nuclear Science (BRNS), Department of Atomic Energy (DAE), Govt. of India.

Research Group
Former
•  Prof. N C Sil, formerly Head of the Theoretical Physics Department, IACS, Kolkata
• Dr. B C Saha, formerly in Theoretical Physics Department, IACS, Kolkata (at present A&M University, Florida Tallahassee, USA)
• Prof. C Sinha, Theoretical Physics Department, IACS, Kolkata
• Dr. S Guha, formerly in Physics Department, Lady Brabourne College, Kolkata
• Dr. B Bagchi, Applied Mathematics Department, Calcutta University
• Dr. A Lahiri, Physics Department, Surendranath College, Kolkata
• Prof. S N Biswas, formerly in physics Department, JNU, New Delhi
• Prof. A Khare, Institute of Physics, Bhubaneswar

Present
•  Dr. Amitava Basuray, Professor, Appl. Phys Dept. Calcutta University
•  Dr. B N Jagatap, L&PT, BARC, Mumbai
•  Dr. Y S Maya, CnID, BARC, Mumbai.
•  Dr. S K Dana, IICB, Kolkata
•  Mr. Arijit Basuray, NTPL, Kolkata

Selected Recent Publications
'On Power supplies used for laboratory demonstration of chaotic electronic oscillators' P K Roy, A Basuray and E Gluskin Am J Phys 73, 1082 (2005)

'Experimental observation on the effect of coupling on different synchronization phenomena in coupled nonidentical Chua's oscillators' P K Roy, S Chakraborty and S K Dana, Chaos 13, 342 (2003)

'A high frequency chaotic signal generator: A demonstration experiment' P K Roy and A Basuray, Am J Phys 71, 34 (2003)

'On coupled KdV equations’ P K Roy Phys Lett A249 55 (1998)

`Supersymmetric generalization of Boussinesq-Burger system’ P K Roy Int J Mod Phys A13 1623 (1998)

`An integrable system of coupled non-linear evolution equations and its supersymmetric version’ P K Roy Nuov Cim 110A 333 (1997)

`Truncated hermonic oscillator and parasupersymmetric quantum mechanics’ B Bagchi, S N Biswas, A Khare and P K Roy PRAMANA -J Phys 49 199 (1997)

`An integrable system governed by coupled non-linear evolution equation’ P K Roy Nuov Cim 109A 1613 (1996)

`Supersymmetric generalization of a coupled KdV equation’ P K Roy and B Bagchi Nuov Cim 109A 597 (1996)

`SO(2,1), supersymmetry and D-dimensional radial Schrodinger equation' B Bagchi and P K Roy Prog Theor Phys (Japan) 94 317 (1995)

`A new look at the harmonic oscillator problem in a finite dimensional Hilbert space' B Bagchi and P K Roy Phys Lett A200 411 (1995)

`Supersymmetry and conservation laws in the K-dV systems' P K Roy, A Lahiri and B Bagchi Mod Phys Lett A5 1339 (1990)

`Remarks on supersymmetric quantum mechanics and the radial Schrodinger equation' P K Roy Mod Phys Lett A5 67 (1990)

`Supersymmetry in quantum mechanics' - A review A Lahiri, P K Roy & B Bagchi Int J Mod Phys A5 1383 (1990)

`Non-uniqueness of the factorisation scheme in quantum mechanics' A Mitra, P K Roy, A Lahiri,& B Bagchi Int J Theor Phys 28 911 (1989)

`Conservation laws, Kortweg-de Vries and sine-Gordon systems,and role of supersymmetry' B Bagchi, A Lahiri and P K Roy Phys Rev D 39 1186 (1989)

`Supersymmetry and the ladder operator technique in quantum mechanics : the radial Schrodinger equation' A Lahiri, P K Roy and B Bagchi Int J Theor Phys 28 183 (1989)

`Isospectral Hamiltonians for potentials having rotational symmetry in N-dimensions' A Lahiri, P K Roy and B Bagchi Phys Rev A38 6419 (1988).

`A scenario of supersymmetry in quantum mechanics' A Lahiri, P K Roy and B Bagchi Nuov Cim 100A 797 (1988)

`Supersymmetry and the three dimensional isotropic oscillator problem' A Lahiri, P K Roy and B Bagchi J Phys A 20 5403 (1987)

`Supersymmetry in atomic physics and the radial problem' A Lahiri, P K Roy and B Bagchi J Phys A 20 3825 (1987)

`Positronium formation into arbitrary excited states in e+ -H scattering' B C Saha and P K Roy Phys Rev A30 2980 (1984)

'Differential and total cross section for elctron capture from helium by protons and positrons' P K Roy, S Guha, C Sinha and N C Sil Ind J Pure & Appl Phys 22 398 (1984)

`Differential cross section for electron capture in p-H collision in small scattering angle region at intermediate energies' P K Roy, B C Saha and N C Sil Ind J Phys 56B 199 (1982)

‘The p(a)-H excitation cross sections for moderate and high n values' P K Roy and B C Saha J Phys B15 1863 (1982)

`Asymptotic cross section for heavy particle impact' P K Roy and B C Saha Ind J Phys 56B 84 (1982)

`Electron capture by protons passing through helium-like ions' C Sinha, S Guha, P K Roy and N C Sil Phys Rev A26 2586 (1982)

`Asymptotic cross section in ion-atom collision' B C Saha and P K Roy Proc. XIIth ICPEAC, Tennessea,USA(1981) p-543

`Behaviour of the asymptotic cross section for excitation of hydrogen atoms by electron impact' P K Roy, B C Saha and N C Sil J Phys B14 2459 (1981)

`Formation of hydrogen atoms in arbitrary excited states by electron capture in p-H collision' P K Roy, B C Saha and N C Sil J Phys B13 3401 (1980)

`Charge exchange cross section in H+-H collision' N C Sil, P K Roy and B C Saha Proc. XIth ICPEAC, Kyoto,Japan (1979) p-438