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Details of Dr. KENFACK SADEM Christian


PERSONAL DATA

Gender

male 
Job title

Lecturer/Searcher 
Department

Department of Physics 
Address

institution 'International Chair in Mathematical physical and applications (CIPMA/ICMPA)
International Chair in Mathematical Physics and Applications (ICMPA  UNESCO CHAIR)
072 BP 50 Cotonou, Rep. of Benin
Current address:
University of Dschang
Physics Department
BP 67 Dschang
Cotonou
Zogbo
229
Until Jun 10, 2016
institution 'International Chair in Mathematical physical and applications (CIPMA/ICMPA)
International Chair in Mathematical Physics and Applications (ICMPA  UNESCO CHAIR)
072 BP 50 Cotonou, Rep. of Benin
Current address:
University of Dschang
Physics Department
BP 67 Dschang Cotonou Zogbo 229 Benin

Regions

Mediterranean Sea  Western Basin

Tel

+237 678 00 59 00 
Email

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PROFESSIONAL DATA

Degree

PhD 
Job type

Teaching/Education

Research Area(s)

Physical Oceanography
,
Physical Oceanography

Research Activities

Two fields of research interest:
1Physical Oceanography and applications/.
The West African monsoon system is a climatologically feature of major economic and social importance to the population of the region whose economy heavily relies on agriculture. Understanding its dynamics, variability at various timescales and predict its onset and evolution, would contribute toward food security and the stability of the region. Study of Sea Surface Temperature (SST) in tropical Atlantic is a research initiative aiming to understand the key physical interactions and feedbacks between ocean and West African monsoon. Achievement of this goal It is important to understand and quantify the role that Tropical Atlantic ocean play in the regulation of Tropical Africa climate and global change. Regional Climate Model (RegCM) and Nonlinear Principal Component Analysis (NLPCA) are the main tools of this research. The scope and goals of my research is to better understand the effect of Tropical Atlantic Ocean on West African monsoon.
2Condensed matter physics/.
A polaron is a quasi particle that arises as a result of a conduction electron (or hole) together with its self induced polarization in an ionic crystal or in a polar semiconductor. Polaronic effects has drawn much attention because of their potential applications, particularly for laser diodes .It also plays an important role in determining the properties of several compounds, such as hightemperature cuprate superconductors, colossal magnetoresistence manganites. Feynman path integral is the first tool of my research. The main conceptual ingredients of the Feynman path integral approach is the interaction of the electron (hole) with the polarization field that is modeled by introduction of the harmonic attraction between the electron (hole) and a “fictitious” particle with mass. The quantum twolevel system is a model which describe a number of physical objects such as atoms, quantum dots, molecular magnets, etc. The system can be excited from the ground state to the upper state by changing in time its parameters (due to external fields). Transition between two levels and time of transition is the goal of my research, depending of the environnement; LandauZener theory and LandauZenerStückelberg (LZS) interferometry theory is the second tool of my research.
Computation of energy and mass of polaron taking account surrounding environment effect is one of the particular objectives of this my research.
Nous focalisons notre étude sur la variabilité des phénomènes oceanique et Atmosphérique dans le Gulf de Guinée.

Research Region

38

Working languages

English; French;

Skills/Expertise

Physical Oceanography, climate change and applications

PUBLICATIONS (as reported by Dr. Kenfack CHRISTIAN)

 S. C. Kenfack , K. F. Mkankam , G. Alory, Y. du Penhoat , N. M. Hounkonnou , D. A. Vondou,and G. N. Bawe.Sea surface temperature patterns in Tropical Atlantic: principal component analysis and nonlinear principal nonlinear component analysis.Nonlin. Processes Geophys.doi:10.519412352014   3. Komkoua Mbienda, A. J., Tchawoua, C., Vondou, D. A., Choumbou, P., Kenfack Sadem, C. and Dey, S. (2016), Impact of anthropogenic aerosols on climate variability over Central Africa by using a regional climate model. Int. J. Climatol.. doi: 10.1002/joc.4701   J E Danga, S C Kenfack and L C Fai. Quantum wire and magnetic control of a spin qubit in the Landau?Zener?Stückelberg interferometry transition. Journal of Physics A: Mathematical and Theoretical, Volume 49, Number 19 (2016)   M. Tiotsop, A. J. Fotue, S. C. Kenfack, H. B. Fotsin, L. C. Fai. (2016) The effect of electromagnetic field and Coulomb impurity on polaron in RbCl triangular quantum dot qubit. Indian Journal of Physics. Online publication date: 22Mar2016.   A. J. Fotue, S. C. Kenfack, M. Tiotsop, N. Issofa, M. P. Tabue Djemmo, A. V. Wirngo, H. Fotsin and L. C. Fai. Temperature, impurity and electromagnetic field effects on the transition of a twolevel system in a triangular potential. Epjp, 31. DOI: 10.1140/epjp/i2016160759 (2016)   A.J. Fotue, N. Issofa, M. Tiotsop, S.C. Kenfack, M.P. Tabue Djemmo, A.V. Wirngo, H. Fotsin, L.C. Fai. (2016) Bound magnetopolaron in triangular quantum dot qubit under an electric field. Superlattices and Microstructures 90, 2029. Online publication date: 1Feb2016.   A.J. Fotue , N. Issofa , M. Tiotsop , S.C. Kenfack , M.P. Tabue Djemmo, A.V. Wirngo, H. Fotsin , L.C. Fai. Bound magnetopolaron in triangular quantum dot qubit under an electric field. Superlattices and Microstructures 90 (2016) 2029.   2. Komkoua Mbienda, A. J., Tchawoua, C., Vondou, D. A., Choumbou, P., Kenfack Sadem, C. and Dey, S. (2016), Sensitivity experiments of RegCM4 simulations to different convective schemes over Central Africa. Int. J. Climatol.. doi: 10.1002/joc.4707   Alain Jerve Fotue, Sadem Christian Kenfack, Nsangou Issofa, Maurice Tiotsop, Michel Pascal Tabue Djemmo, Amos Veyongni Wirngo, Hilaire Fotsin, Lukong Cornelius Fai. Decoherence of Polaron in Asymmetric Quantum Dot Qubit Under an Electromagnetic Field. American Journal of Modern Physics Volume 4, Issue 3 , May 2015, Pages:138148 DOI: 10.11648/j.ajmp.20150403.16.   M.B. Kenmoe , S.E. Mkam Tchouobiap , J.E. Danga C. Kenfack Sadem and L.C. Fai: Lie algebras for some specific dissipative Landau?Zener problems. Physics Letters A 379, 635?642, (2015).   S. C., Kenfack, A.J.Fotue, N.Issofa, JR.D.Djomou A.B.Tchapda, M.Tiotsop, L.C.Fai. Phase Transition of Polariton and Magnetopolariton in Semiconductor Microcavity. Journal of nanoand electronic physics. Vol.7No4, 04001 (7pp) (2015).   A. J. Fotue, N. Issofa, M. Tiotsop, S. C. Kenfack, M. P. Tabue Djemmo, H. Fotsin, and L. C. Fai: Electric and magnetic optical polaron in quantum dot Part 1: strong coupling. Journal of Semiconductors. Vol. 36, No. 7. 2015.   M.B. Kenmoe, S.E. Mkam Tchouobiap, C. Kenfack Sadem, B. tchapda and L.C. Fai: Nonadiabatic and adiabatic transitions at level crossing with decay: two and threelevel systems. J. Phys. A: Math. Theor. 48 095303 (21pp), (2015).   R. M. Keumo Tsiaze, S. E. Mkam Tchouobiap, A. J. Fotué, C. Kenfack Sadem, J. E. Danga, C. Lukong Faï, M. N. Hounkonnou: Finitesize and Fluctuation Effects on Phase Transition and Critical Phenomena using MeanField Approach Based on Renormalized Model. arXiv:condmat/9701129. 2013.   Fai., L.C. Fomethe, A. Fotue, A. Kenfack, S.C. Diffo, J.T. Mborong, V.B. and Domngang, S. (2010) Feynman Polaron Charateristics in Two Tubular Quantum Dots with Parabolic and Rectangular Potential Wells, journal of Computational and Theoretical Nanoscience , 7, 15011506   Fai, L.C. Fomethe, A. Mborong, V.B. Kenfack, S.C. Diffo, J.T. Domngang, S. and Ashok Mody, (2010). Screening effect on the polaron by plasmons in the field of selfaction potential in a planar nanocrystal, Superlattices and Microstructures, 47, 631647   Tchoffo, M. FAI., L. C. Issofa, N. Kenfack, S. C. and Diffo, J. T. (2009)Magnetopolaron in a cylindrical quantum dot, International Journal of Nanoscience (IJN), 8, 455?463   M. B. Kenmoe, S. C. Kenfack, A. J. Fotue, A. B. Tchapda, M. Tchoffo, L. C. Fai, J. E. Danga, M. E. Ateuafack, M. P. Djemmo: LandauZener transitions between two and three decaying levels. ArXiv: 1307.3878.2013.   A. J. Fotue, S. C. Kenfack, N. Issofa, M. Tiotsop, M. P. Djemmo, A. V. Wirngo, H. F., L. C. Fai: Energy Levels of Weak Coupling MagnetoOptical Polaron and Temperature Effect in Spherical Quantum Dot. American Journal of Modern Physics. 2015; 4(4): 158164. doi: 10.11648/j.ajmp.20150404.12   M Tiotsop, A J Fotue, S C Kenfack, N Issofa, H Fotsin, L C Fai. Effects of Shannon entropy and electric field on polaron in RbCl triangular quantum dot. Chin. Phys. B, 2016, 25(4):048401.   A. J. Fotue, M. Tiotsop, N. Issofa, S. C. Kenfack, A. V. Wirngo, H. Fotsin, L. C. Fai: Bound Magnetopolaron in an Asymmetric Cylindrical Quantum Dot Qubit in an Electric Field. American Journal of Modern Physics. 2015; 4(3): 109117. doi: 10.11648/j.ajmp.20150403.12   A. J. Fotue, S. C. Kenfack, N. Issofa, M. Tiotsop, M. P. Djemmo, A. V. Wirngo, H. F., L. C. Fai: Decoherence of Polaron in Asymmetric Quantum Dot Qubit Under an Electromagnetic Field. American Journal of Modern Physics. 2015; 4(3): 138148. doi: 10.11648/j.ajmp.20150403.16   A. J. Fotue, N. Issofa, M. Tiotsop1, S. C. Kenfack, M. P. Tabue Djemmo, A. V. Wirngo, H. Fotsin and L. C. Fai: Modified LeeLowPines Polaron in Spherical Quantum Dot in an Electric Field. Part 2: Weak Coupling and Temperature Effect. Physical Science International Journal. 7(2): 97106, 2015, Article no.PSIJ.2015.061   A. J. Fotue, N. Issofa, M. Tiotsop, S. C. Kenfack, M. P. Tabue Djemmo, A. V. Wirngo, H. Fotsin and L. C. Fai. Modified LeeLowPines Polaron in Spherical Quantum Dot in an Electric Field. Part 2: Weak Coupling and Temperature Effect . Physical Science International Journal 7(2): 97106, 2015, Article no.PSIJ.2015.061 ISSN: 23480130.   A. J. Fotue, S. C. Kenfack, H. Fotsin, M. Tiotsop, L. C. Fai and M. P. Tabue Djemmo: Modified LeeLowPines Polaron in Spherical Quantum Dot in an Electric Field. Physical Science International Journal. 6(1): 1525, ISSN: 23480130, (2015). 
