Teaching Interest:
Physical Chemistry
Teaching Experience
1. Permanent aliation : (Since August' 2016)
Assistant Professor,
Department of Chemistry,
Jhargram Raj College,
Jhargram, Paschim Medinipur, West Bengal,
Pin-721507.
2. Previous aliation : (May' 2009-August' 2016)
Assistant Professor,
Department of Chemistry,
Barasat Govt. College,
10 K.N.C. Road, Barasat,
Kolkata- 700124.
3. Guest faculty :
(a) Department of Zoology, Jhargram Raj College.
(b) Department of Physics, Barasat Govt. College (2009-2016).
(c) Department of Chemistry and Bio-chemistry, Presidency University (2004-).
(d) Department of Chemistry and Industrial Chemistry, Ramakrishna Mission Vidyamandira
(2002-).
(e) Department of Chemistry, Ramakrishna Mission Vidyamandira (2010-).
(f) Department of Chemistry, Acharya Prafulla Chandra College (2010-2014).
(g) Department of Chemistry, Habra Sree Chaitnya College (2009-2014).
(h) Department of Chemistry (PG), Vivekananda Centenary College (autonomous)
(2012-2017).
(i) Department of Physics (PG), Gurudas College, (2018-).
(j) Department of Chemistry (PG), Haldia Govt. College, (2017-2018).
(k) Department of Chemistry (PG), Midnapore College (autonomous), (2018-).
(l) Department of Chemistry (PG), Midnapore city College, (2018-).
(m) Department of Chemistry (PG), Panskura Banamali College (autonomous), (2019-)
Details of Research Experience
1. Quantum Mechanics
(a) Electronic Structure Theory (Coupled Cluster Theory)
i. Reappraisal of the role of Size-Extensive Normalization for Multi-reference
Coupled Cluster (MRCC) theory using General Model Space: A Valence
Universal MRCC approach.
ii. An Externally-Corrected Size-Extensive Single-Root MRCC formalism: Its
kinship with the rigorously Size-Extensive State-Speci c MRCC Theory.
iii. An exact mapping of the state-speci c multi-reference coupled cluster theory
to a multi-reference dressed CI: an ecient way to bypass both intruders and
redundancy.
(b) Perturbation Theory in Quantum Mechanics
i. Energy Levels of a Particle Con ned in a Super-circular Box.
ii. Perturbative and non-perturbative studies with the delta-function potential.
iii. On the Sign of the Second Order Energy Shift in Rayleigh-Schrodinger Perturbation
Theory for any Non-degenerate state.
(c) Perturbation Theory in Quantum Dynamics
i. Fluctuation dynamics of a parametrically driven oscillator.
ii. Quantum wave packet revival of a con ned harmonic oscillator: crossover
of semi-classical time period from free particle in a box to simple harmonic
oscillator.
(d) Quantum Modelling
i. Free electron model to understand the aromaticity, antiaromaticity in cyclic
conjugated hydrocarbons.
ii. Graham's law of di usion: Quantum analogy and nonideality.
2. Statistical Mechanics:
(a) Casimir E ect
i. Quantum Ideal Gas in a Potential: Finite Temperature Casimir E ect.
ii. Ideal quantum gas in a nite sized container: speci c heat and Casimir force.
iii. Exact crossover function for the Casimir force in a non-interacting Bose gas.
iv. Casimir Force of a con ned Bose gas with a parabolic potential.
(b) Bose-Einstein Condensation
Bose-Einstein condensation, speci c heat and entropy of a nite number of particles
trapped harmonically in one dimension.
(c) Finite Size E ect on Ideal Gas
i. Statistical Mechanics for the supersymmetric partner of a particle in a box.
ii. Finite size e ect on classical ideal gas revisited.
iii. Finite size e ect on classical gas with attractive nonideality.
3. Thermodynamics:
(a) On the Joule-Thomson Coecient of van der Waals gas.
(b) On the Heat-capacity of van der Waals gas.
Selected publications
1. Method of Successive Approximation and its application in chemistry, P. Ghosh, S.
Ghosh and N. Bera?, Indian Journal of Physics, 2019, (Just accepted).
2. Revising Saha-Basu Equation of State, P. Ghosh, S. Ghosh and N. Bera?, Europen
Journal of Physics, 40(1), 01510, 2018.
3. On the Joule-Thomson coecient of van der Waals gas, P. Ghosh, S. Ghosh and
N Bera?, Indian Journal of Physics (communicated), 2018.
4. Finite Size E ect on Classical Ideal gas revisited, P. Ghosh, S. Ghosh, J. Mitra and
N. Bera?, Europen Journal of Physics, 36(5), 055046, 2015.
5. Classical and revival time periods of con ned harmonic oscillator, P. Ghosh, S. Ghosh
and N. Bera?, Indian Journal of Physics, 89(2), 157-166, 2015.
6. Free Electron Model to Understand the Aromaticity, Anti-aromaticity and Non-aromaticity
in Cyclic Conjugated Hydrocarbons, P. Ghosh, M. Sultana and N. Bera?, Aureole: An
Academic Journal, 3(2), 149-168, 2011.
7. Graham's law of di usion: Quantum analogy and non-ideality, C. Das, N. Bera, K.
Bhattacharyya, Journal of Chemical Science, 121(5), 607, 2009.
8. Exact crossover function for the Casimir force in a non-interacting Bose gas, N. Bera,
J. K. Bhattacharjee, The European Physics Journal D, 53(1), 21-26, 2009.
9. Perturbative and nonperturbative studies with the delta function potential, N. Bera,
K. Bhattacharyya, J. K. Bhattacharjee, American Journal of Physics, 76(3), 250-257,
2008.
10. On the sign of the second-order energy shift in the Rayleigh?Schrdinger perturbation
theory for a highly excited state, N. Bera, K. Bhattacharyya, J. K. Bhattacharjee,
Journal of Physics A: Mathematical and Theoretical, 41(4), 045301, 2008.
11. Energy levels of a particle con ned in a super-circular box, N. Bera, J. K. Bhattacharjee,
S. Mitra, S. P. Khastgir, The European Physics Journal D, 46(1), 41-50,
2008.
12. An externally-corrected size-extensive single-root MRCC formalism: Its kinship with
the rigorously size-extensive state-speci c MRCC theory, S. Das, N. Bera, S. Ghosh,
D. Mukherjee, Journal of Molecular Structure: THEOCHEM, 771(1-3), 79-87, 2006.
13. Reappraisal of the role of size-extensive normalization for multireference coupled cluster
(MRCC) theory using general model space: A valence universal MRCC approach,
N. Bera, S. Ghosh, D. Mukherjee, S. Chattopadhyay, The Journal of Physical Chem-
istry A, 109(50), 11462-11469, 2005.
Books Published:
1. Classical-Quantum Correspondence revisited: A case study in the context of linear Simple
Harmonic Oscillator, N. Bera, S. Ghosh, P.Ghosh, ISBN-13: 978-1536158106,
ISBN-10: 1536158100, Nova Publication, 15th August, 2019.
2. Physical Chemistry: Concepts & Models (Gaseous State and Transport Phenomena),
Volume 1, N. Bera, S. Ghosh, P.Ghosh, ISBN-10: 8192695263, ISBN-13: 978-
8192695266, Techno World Publication, Kolkata, 2018.
3. Physical Chemistry: Concepts & Models (Chemical Kinetics, Catalysis & Surface
Chemistry), Volume 2, N. Bera, S. Ghosh, P.Ghosh, ISBN-13: 978-9388347266,
Techno World Publication, Kolkata, 2019.
4. Mathematics & Statistics for Chemists, N. Bera, S. Ghosh, P.Ghosh, ISBN-10:
8192695263, ISBN-13: 978-9388347303, TechnoWorld Publication, Kolkata, 2019.
Awards
1. Held university rank 7 in CU in B. Sc. Chemistry (H), 2002.
2. CSIR-UGC NET (Chemical Science)- JRF (within top 20%), 2003-December.
3. GATE (Chemical Science), AIR-7, (2004).
4. SET (Chemical Science), (2004).
E-mail : nabakumarbera@gmail.com