IIEST, Shibpur

Indian Institute of Engineering Science and Technology, Shibpur

(Formerly Bengal Engineering and Science University, Shibpur)

Empowering the nation since 1856

Ujjal Debnath
Ujjal Debnath Ujjal Debnath
Lecturer, Mathematics


  • Ph.D. in Mathematics (specialization in Relativity and Cosmology) from Jadavpur University, India in 2004..
  • Master's degree (in Mathematics) from Jadavpur University, India in 1999.
  • Bachelor's degree (in Mathematics) from Jadavpur University, India in 1997.

 

Contact Addresses
Residence C/289, Bapujinagar, Jadavpur,
Kolkata-700 092, West Bengal, India
  Phone (office) +91 - 33 - 26684561/62/63 Ext. 219)
  Mobile +91 - 9433353462
  email ujjaldebnath@yahoo.com ,ujjal@iucaa.ernet.in  

 

Research Areas
  • Relativity and Cosmology.

 

Recent Publications
  • Subenoy Chakraborty, Narayan Chandra Chakraborty and Ujjal Debnath Brans-Dicke Cosmology in a Anisotropic Model when Velocity of Light Varies International Journal of Modern Physics D, Vol. 11 No. 6, (2002) 921-932
  • Subenoy Chakraborty, Narayan Chandra Chakraborty and Ujjal Debnath, Brans-Dicke Cosmology in an Anisotropic Model when Velocity of Light Varies, International Journal of Modern Physics D, Vol. 11 No. 6, (2002) 921-932
  • Subenoy Chakraborty, Narayan Chandra Chakraborty and Ujjal Debnath, Quintessence Problem and Brans-Dicke theory, Modern Physics Letters A, Vol. 18, No. 22, (2003) 1549-1555
  • Subenoy Chakraborty, Narayan Chandra Chakraborty and Ujjal Debnath, A Quintessence Problem in Brans-Dicke Theory with Varying Speed of Light, International Journal of Modern Physics D, Vol. 12 No. 2, (2003) 325-335
  • Subenoy Chakraborty, Narayan Chandra Chakraborty and Ujjal Debnath, A Quintessence Problem in self-interacting Brans-Dicke theory International Journal of Modern Physics A, Vol. 18, No. 19, (2003) 3315-3323
  • Subenoy Chakraborty, Narayan Chandra Chakraborty and Ujjal Debnath, The Cosmology in a Perfect or Causal Viscous Fluid with Varying Speed of Light, Physica Scripta, Vol. 68, No. 6, (2003) 399-404
  • Subenoy Chakraborty and Ujjal Debnath, Does Cosmic No-Hair Conjecture in Brane Scenarios follow from General Relativity, Classical and Quantum Gravity, Vol. 20, No. 13, (2003) 2693-2696
  • Asit Banerjee, Ujjal Debnath and Subenoy Chakraborty, Naked Singularities in Higher Dimensional Gravitational Collapse, International Journal of Modern Physics D, Vol. 12, No. 7, (2003) 1255-1264
  • Ujjal Debnath and Subenoy Chakraborty, The study of gravitational collapse model in higher dimensional space-time, Modern Physics Letters A, Vol. 18, No. 18, (2003) 1265-1271
  • Ujjal Debnath, Subenoy Chakraborty and John D. Barrow, Quasi-Spherical Gravitational Collapse in Any Dimension, General Relativity and Gravitation, Vol. 36, No. 2, (2004) 231-243
  • Ujjal Debnath and Subenoy Chakraborty, Gravitational Collapse in Higher Dimensional Space-Time, General Relativity and Gravitation, Vol. 36, No. 6, (2004) 1243-1253
  • Ujjal Debnath and Subenoy Chakraborty, Naked Singularities in Higher Dimensional Szekeres Space-Time, Journal of Cosmology and Astroparticle Physics, Vol. 05, (2004) 001
  • Subenoy Chakraborty and Ujjal Debnath, A Study of Higher Dimensional Inhomogeneous Cosmological Model, International Journal of Modern Physics D, Vol. 13, No. 6, (2004) 1085-1093
  • Asit Banerjee, Ujjal Debnath and Subenoy Chakraborty, Higher Dimensional Szekeres Space-Time in Brans-Dicke Scalar Tensor Theory, International Journal of Modern Physics D, Vol. 13, No. 6, (2004) 1073-1083
  • Soma Nath, Subenoy Chakraborty and Ujjal Debnath, Anisotropic Brane Cosmology with Variable G and, Journal of Cosmology and Astroparticle Physics, Vol. 11, (2004) 012
  • Ujjal Debnath, Asit Banerjee and Subenoy Chakraborty, Role of Modified Chaplygin Gas in Accelerated Universe, Classical and Quantum Gravity, Vol. 21, No. 23, (2004) 5609-5617 
  • Ujjal Debnath and Subenoy Chakraborty, Role of Initial Data in Quasi-Spherical Higher Dimensional Gravitational Collapse, General Relativity and Gravitation, Vol. 37, No. 1, (2005) 225 - 232
  • Ujjal Debnath, Soma Nath and Subenoy Chakraborty, Quasi-Spherical Solution with Heat Flux and Non-Adiabatic Collapse of Radiating Star, General Relativity and Gravitation, Vol. 37, No. 1, (2005) 215 - 223
  • Subenoy  Chakraborty  and  Ujjal  Debnath, Quasi-spherical gravitational collapse and the role of initial data, anisotropy and inhomogeneity, Modern Physics Letters A, Vol. 20, No.19, (2005) 1451-1458
  • Subenoy  Chakraborty,  Sanjukta  Chakraborty and  Ujjal  Debnath, Role of Pressure in Quasi-spherical Gravitational Collapse, International Journal of Modern Physics D, Vol. 14, No. 10, (2005) 1707-1723
  • Ujjal  Debnath,  Subenoy  Chakraborty and Naresh Dadhich, A Dynamical Symmetry of the Quasi-Spherical (or Spherical) Collapse, International Journal of Modern Physics D, Vol. 14, No. 10, (2005) 1761-1767
  • Sisir Bhanja,  Subenoy  Chakraborty and  Ujjal Debnath, Adiabatic Particle Production with Decaying  and Anisotropic Universe, International Journal of Modern Physics D, Vol. 14, No. 11, (2005) 1919 – 1925
  • Ujjal  Debnath, Banibrata Mukhopadhyay  and Naresh Dadhich, Space-time curvature coupling of spinors in early universe: Neutrino     asymmetry and a possible source of baryogenesis, Modern Physics Letters A, Vol. 21, No. 5, (2006) 399-408
  • Ujjal Debnath, Soma Nath and Subenoy Chakraborty, Quasi-Spherical Collapse with Cosmological Constant, Monthly Notices of the Royal Astronomical Society, Vol. 369, (2006) 1961-1964
  • Soma Nath, Subenoy Chakraborty and Ujjal Debnath, Gravitational Collapse due to dark matter and dark energy in the brane world scenario, International Journal of Modern Physics D, Vol. 15, No. 8, (2006) 1225 - 1236 
  • Sanjukta Chakraborty, Subenoy Chakraborty and Ujjal Debnath, The effect of pressure in higher dimensional quasi-spherical gravitational collapse, International Journal of Modern Physics D, Vol. 16, No. 5, (2007) 833 – 846.
  • Anup Kumar Singha and Ujjal Debnath, Varying Speed of Light, Modified Chaplygin Gas and Accelerating Universe, International Journal of Modern Physics D, Vol. 16, No. 1, (2007) 117-122.
  • Writambhara Chakraborty and Ujjal Debnath, Is Modified Chaplygin gas along with barotropic fluid responsible for acceleration of the Universe, Modern Physics Letters A, Vol. 22, No. 24, (2007) 1805–1812.
  • Sanjukta Chakraborty, Subenoy Chakraborty and Ujjal Debnath, Quasi-Spherical Gravitational Collapse in higher dimension and the effect of equation of state, Gravitation and Cosmology, Vol. 13, No. 3 (51), (2007) 211-216.
  • Ujjal Debnath, Variable Modified Chaplygin Gas and Accelerating Universe, Astrophysics and Space Science, Vol. 312, No. 3-4, (2007) 295 - 299
  • Brien C. Nolan and Ujjal Debnath, Is the shell-focusing singularity of Szekeres space-time visible?, Physical Review D, Vol. 76, No. 10, (2007) 104046 (1-10)
  • Writambhara Chakraborty, Ujjal Debnath and Subenoy Chakraborty, Generalized Cosmic Chaplygin Gas Model with or without Interaction, Gravitation and Cosmology, Vol. 13, No. 4 (52), (2007)  294 –297
  • Writambhara Chakraborty and Ujjal Debnath, Effect of Dynamical Cosmological Constant in presence of Modified Chaplygin Gas for Accelerating Universe, Astrophysics and Space Science, Vol. 313, No. 4, (2008) 409 – 417
  • Soma Nath, Ujjal Debnath and Subenoy Chakraborty, Junction Conditions and Consequences of Quasi-Spherical Space-Time with Electro-Magnetic Field and Vaidya Matric, Astrophysics and Space Science, Vol. 313, No. 4, (2008) 431 - 436
  • Writambhara Chakraborty and Ujjal Debnath, Interaction between scalar field and ideal fluid with inhomogeneous equation of state, Physics Letters B, Vol. 661, No. 1, (2008) 1 - 4.
  • Surajit Chattopadhyay, Ujjal Debnath and Goutami Chattopadhyay, Acceleration of the Universe in Presence of Tachyonic field, Astrophysics and Space Science, Vol. 314, No. 1-3, (2008) 41 – 44.
  • Subenoy Chakraborty and Ujjal Debnath, Shell Crossing Singularities in Szekeres  Quasi-Spherical Models, Gravitation and Cosmology, Vol 14, No. 2,  (2008) 184 – 189.
  • Ujjal Debnath, Narayan Chandra Chakraborty and Subenoy Chakraborty, Gravitational Collapse in Higher Dimensional Husain Space-Time, General Relativity and Gravitation, Vol. 40, No. 4,  (2008) 749 – 763.
  • Anup Kumar Singha and Ujjal Debnath, Scalar Field Cosmology with Polytropic and Causal Viscous Fluids, Astrophysics and Space Science, Vol. 314, No. 4, (2008), 347-350.
  • Ujjal Debnath and Subenoy Chakraborty, Role of Modified Chaplygin Gas as an Unified Dark Matter-Dark Energy Model in Collapsing Spherically Symmetric Dust Cloud, International Journal of Theoretical Physics, (Accepted) (2008)
  • Writambhara Chakraborty and Ujjal Debnath, Role of Tachyonic Field in Accelerating Universe in Presence of Perfect Fluid, Astrophysics and Space Science, (Accepted) (2008)
  • Surajit Chattopadhyay and Ujjal Debnath, Density Evolution in the New Modified Chaplygin Gas Model, Gravitation and Cosmology, (Accepted) (2008)
  • Writambhara Chakraborty and Ujjal Debnath, Role of Brans-Dicke Theory with or without self-interacting potential in cosmic acceleration, International Journal of Theoretical Physics, (Accepted) (2008)
  • Anup Kumar Singha and Ujjal Debnath, Accelerating Universe with a Special Form of Decelerating Parameter, International Journal of Theoretical Physics, (Accepted) (2008)


    Courses Undertaken



    Department of Mathematics, BESU, Shibpur - 7111 03, INDIA