Personal Profile
| Name | Dr. Ajanta Bhowal Acharyya |
| Designation | Associate Professor |
| Department | Physics |
| Email Id | ajanta.bhowal@gmail.com |
| Year of Joining present service | 2002 |
| Date of Joining WBES | 02-01-2002 |
Educational Qualifications
| Passout Year | Examination | Passout From | Division |
|---|---|---|---|
| 1997 | Postdoctoral Research | Saha Institute of Nuclear Physics | |
| 1996 | Ph.D. | Saha Institute of Nuclear Physics, University of Calcutta | |
| 1990 | Post M.Sc | Saha Institute of Nuclear Physics | |
| 1988 | Master of Science (M.Sc.) | University of Calcutta | 1st Class |
College Served
| College Name | Served From | Served Till |
|---|---|---|
| Lady Brabourne College | 2009 | Jan, 2025 |
| Hooghly Mohsin College | 2002 | 2009 |
Teaching Experience
| UG Experience | PG Experience |
|---|---|
| 38 Years | 14 Years 11 Months |
| UG or PG | College Name | From Date | To Date | Duration |
|---|---|---|---|---|
| PG | Lady Brabourne College | Feb, 2010 | Jan, 2025 | 14 Years 11 Month |
| UG | Lady Brabourne College | Dec, 2009 | Jan, 2025 | 15 Years 1 Month |
| UG | lady brabourne College | Dec, 2009 | Jan, 2025 | 15 Years 1 Month |
| UG | Hooghly Mohsin College | Jan, 2002 | Nov, 2009 | 7 Years 10 Month |
| 0 | - | - |
Area of Research and Interest
| Details |
|---|
| Thermodynamics |
| Electrostatics (UG) |
| Statistical Mechanics (UG and PG) |
| Solid State Physics (UG) |
| Computing in FORTRAN (UG and PG) |
| Computing in PYTHON (UG CBCS) |
| Non Linear Dynamics (PG) |
| A symmetric fixed point of a four dimensional reversible mapping can loose its stability due to the collision of two pairs of multipliers on the unit circle and then moving away to the complex plane in opposite directions along two conjugate rays. The effect of such collisions, at an irrational angle (i.e., incommensurable with π , on the behaviour of invariant curves(IC) around that symmetric fixed point describes the 'reversible Hopf bifurcation' (or Reversible Naimark Sacker bifurcation). We have studied exhaustively the various aspects of the reversible Hopf bifurcation in a family of four dimensional reversible maps. Instead of an irrational angle if two pairs of multipliers collide at or near a rational angle. at exp(ωi) with ω =2π p/q (p,q mutually prime), then q-periodic orbits are generally found to bifurcate and it is termed as resonant collision of order q. We have then studied in details the bifurcation of periodic orbits (period 2 to 6) as a result of resonant collision near rational angles . |
| The concept of Self Organised Criticality, introduced by BTW in terms of a cellular autamata model, is expected to be the underlying cause of a large class of phenomena involving dissipative, nonlinear transport in open systems. We studied the damage spreading in BTW model. We have also studied the onsets of avalanches and dissipations in the subcritical region of the BTW model . Studied extensively the statistical behaviour of BTW model in SOC state. |
| In Ising model, spontaneous magnetization decreases continuously as temperature increases and above a particular temperature, known as critical temperature, magnetization vanishes.. Near the transition temperature some physical quantities show power law behavior, which are characterized by a set of critical exponents. This critical exponents are calculated numerically with the help of mean field equation of state of Ising Ferromagnet and compared with the analytically estimates values. The dynamical behaviour of Ising ferromagnets in meanfield approximation is also studied. |
| Many natural phenomena show synchronisation. It has been studied extensively to understand the occurrence of synchronisation with the help of modeled dynamical system, coupled map lattice(CML). It has been obseved that synchronistion occurs in globally coupled chaotic maps. And the occurrence of synchronisation depends on the strength of global coupling parameter. We have observed that synchronisation occurs at lower values of global coupling strength parameter in case of Lozi map, if one of the parameter of the Lozi map, α, is kicked periodically from a value,α1 (correspondig to chaotic region of the map) to a value α2 (corresponding to fixed point behaviour of the map) compared to the case having fixed value of α1. |
Publication: Research Papers in Journals
| Sl No. | Year/Month | Title | Name of Journal | Volume / Page No. |
|---|---|---|---|---|
| 1 | Jan, 2023 | Transient Behavior of Damage Spreading in the Two-Dimensional Blume–Capel Ferromagnet, | Journal of Statistical Physics, | 190 (2023)1. |
| 2 | 2019 | Synchronization of globally coupled Lozi map using periodically varying parameter, | Acta Physica Polonica B | 50 (pg: 1671-1679) |
| 3 | 2018 | Generalisation of BTW Model with Next Nearest Neighbour | Acta Physica Polonica B | 49 (Pg :1705-1715) |
| 4 | 2017 | BTW Model with probabilistically nonuniform distribution of particles coming from the unstable sites | Acta Physica Polonica B | 48 (pg:207-215) |
| 5 | 2012 | Bose Einstein Condensation in arbitrary dimension | Acta Physica Polonica B | 43 (pg-1805) |
| 6 | 2011 | Evidence of invariance of time scale at critical point in Ising meanfield equation of state | Comm. Theo Phys. | 55 (Pg-1109) |
| 7 | 2011 | Cluster statistics in BTW automata | Acta Physica Polonica B | 42 (pg-19) |
| 8 | 2010 | Critical Slowing Down along the dynamic phase boundary in Ising meanfield dynamics | Int. J. Mod. Phys. C | 21 (pg-481) |
| 9 | 2008 | Inflection point as a manifestation of tricritical point in Ising meanfield dynamics, | Comm. Comp. Phys. | 3 (pg-397) |
| 10 | 2003 | Modelling and Computer simulation of an insurance policy: A search for maximum profit | Int.J.Mod. Phys. C | 14 (pg-1041) |
| 11 | 1999 | “Reduction of Noise in Chaotic Time series Data” | Pramana | 52 No-1 (pg-25) |
| 12 | 1998 | "Resonant Collision in 4D Reversible Maps, a description scenarios" | Physica D | 112 (pg-95) |
| 13 | 1998 | “Onsets of avalanches in the BTW model” | Physica A | 253 (pg-301) |
| 14 | 1997 | "Exotic Spectra, Wavefunctions and Transport in Incommensurate Lattices" | Pramana | 48 (pg-555) |
| 15 | 1997 | “Damage spreading in the 'sandpile' model of SOC” | Physica A | 247 (pg-327) |
| 16 | 1995 | "Fourth Order Resonant Collisions of Multipliers in Reversible Maps: Period-4 Orbits and Invariant Curves " | Physica D | 85 (pg-10) |
| 17 | 1993 | "Small angle Krein collision in a family of 4-D reversible maps" | Phys Rev E | 47(pg 3932) |
| 18 | 1993 | "Stability of invarriant curves in 4-D reversible maps near 1:1 resonance." | Physica-D | 63 (page 99) |
| 19 | 1993 | "Hopf bifurcation in four-dimensional reversible maps and renormalisation equations" | Phys-Lett A | 179 (pg-9) |
Talk/Lectures
| Sl No. | Date | Title | Organised By |
|---|---|---|---|
| 1 | 01-01-1995 | Theoretical Physics Seminar circuit programme | University of Pune |
| 2 | 01-01-1995 | Theoretical Physics Seminar circuit programme | Bharati Darshan University |
| 3 | 01-01-1995 | Theoretical Physics Seminar circuit programme | Indian Institute of Astrophysics (Bangalore) |
Oral/Poster Presentation
| Sl No. | Date | Title | Title of Conference | Organised By |
|---|---|---|---|---|
| 1 | 17-05-2015 | Random walk in continuum | National Seminer on Current Trends in Computational Physics -2015 | Department of Physics, Gour Banga University, Malda , WB |
Scholarship/Award/Felicitations
| Sl No. | Year/Month | Details of Awards |
|---|---|---|
| 1 | 2018 | Certificate of Outstanding Contribution in Reviewing by Elsevier |