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>> Românã
 
   
 

Nicolae Cotfas

University of Bucharest, Faculty of Physics, Bucharest-Magurele, Romania

Institution web page: http://www.fizica.unibuc.ro/fizica/Main.asp
Personal web page: http://fpcm5.fizica.unibuc.ro/~ncotfas
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Born: 1954

Interests: Coherent states, Quantum mechanics, Special functions, Mathematical models for quasicrystals and carbon nanotubes

Details:
1. Coherent states and their applications to quantum mechanics
2. Finite frames and finite frame quantization
3. Orthogonal polynomials, special functions and their applications
4. Mathematical models for quasicrystals and carbon nanotubes

Selected publications:
• Nicolae Cotfas and Daniela Dragoman. Properties of finite Gaussians and the discrete-continuous transition. J. Phys. A: Math. Theor. , 45, p. 425305 , 2012.
• Nicolae Cotfas and Liviu Adrian Cotfas. Hypergeometric type operators and their supersymmetric partners . Journal of Mathematical Physics, 52, p. 052101, 2011.
• Nicolae Cotfas, Jean Pierre Gazeau and Apostol Vourdas. Finite-dimensional Hilbert space and frame quantization. Journal of Physics A: Mathematical and Theoretical, 44, p. 175303, 2011.
• Nicolae Cotfas , Jean Pierre Gazeau and Katarzyna Górska . Complex and real Hermite polynomials and related quantizations. Journal of Physics A: Mathematical and Theoretical, 43, p. 305304, 2010.
• Nicolae Cotfas and Jean Pierre Gazeau. Finite tight frames and some applications. Journal of Physics A: Mathematical and Theoretical, 43, p. 193001, 2010.
• N. Cotfas. Gazeau-Klauder type coherent states for hypergeometric type operators. Central European Journal of Physics, 7, pp. 147-159, 2009.
• N. Cotfas. Symmetry properties of Penrose type tilings. Philosophical Magazine, 88, pp. 2017-2023, 2008.
• N. Cotfas. Aperiodic packings of clusters obtained by projection. Philosophical Magazine, 87, pp. 2823-2830, 2007.
• Nicolae Cotfas. Discrete quasiperiodic sets with predefined covering cluster. Philosophical Magazine, 86, pp. 895-900, 2006.
• Nicolae Cotfas. Systems of orthogonal polynomials defined by hypergeometric type equations. Electronic Transactions on Numerical Analysis (ETNA), 24, pp. 45-54, 2006.
• Nicolae Cotfas. Shape invariant hypergeometric type operators with application. Central European Journal of Physics, 4, pp. 318-330, 2006.
• Nicolae Cotfas. Discrete quasiperiodic sets with predefined local structure. Journal of Geometry and Physics, 56, pp. 2415-2428, 2006.
• Nicolae Cotfas. On the linear representations of the symmetry groups of single-wall carbon nanotubes. Journal of Physics A: Mathematical and General, 39, pp. 9755-9765, 2006.
• Nicolae Cotfas. An alternate mathematical model for single-wall carbon nanotubes. Journal of Geometry and Physics, 55, pp. 123-134, 2005.
• Nicolae Cotfas. Icosahedral multi-component model sets. Journal of Physics A: Mathematical and General, 37, pp. 3125-3132, 2004.
• Nicolae Cotfas. Systems of orthogonal polynomials defined by hypergeometric type equations. Central European Journal of Physics, 2, pp. 456-466, 2004.
• Nicolae Cotfas. Shape invariance, raising and lowering operators in hypergeometric type equations. Journal of Physics A: Mathematical and General, 35, pp. 9355-9365, 2002.
• Nicolae Cotfas. Penrose-type patterns obtained by projection from a 12D lattice. Journal of Physics A: Mathematical and General, 34, pp. L479-L482, 2001.


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