Results 231 to 240 of about 107,982 (263)
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Representation of the spin operator in the spin-free second quantized approach
Journal of Molecular Structure: THEOCHEM, 1998Abstract This paper reports the representation of the spin operation S 2 , corresponding to an N-electron system, using the spin-free second quantization formalism. This approach allows to determine, in a suitable way, the S-representability of the second order reduced density matrix.
A. Torre, L. Lain
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Journal of Chemical Theory and Computation, 2009
We have recently proposed a method to evaluate the weights of resonance structures embedded in a molecular orbital by utilizing singlet-coupling scheme of an electron pair [J. Phys. Chem. A 2006, 110, 9028]. The method was formulated on the basis of the second quantization, in which a biorthogonal operator related to Mulliken population (MP) was used ...
Ikeda, Atsushi +3 more
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We have recently proposed a method to evaluate the weights of resonance structures embedded in a molecular orbital by utilizing singlet-coupling scheme of an electron pair [J. Phys. Chem. A 2006, 110, 9028]. The method was formulated on the basis of the second quantization, in which a biorthogonal operator related to Mulliken population (MP) was used ...
Ikeda, Atsushi +3 more
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High relaxation oscillation frequency operation of a QW-LD at the second quantized level
IEEE Journal of Quantum Electronics, 1994We describe a new approach for improving the relaxation oscillation frequency characteristics of quantum-well lasers at the second quantized level. Applying an antireflection (AR) and high-reflection (HR) coating to the laser facets suppresses lasing at the first quantized transition and promotes it at the second quantized transition.
T. Takeshita, M. Ikeda
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Perturbations of secondary-quantization operators
Functional Analysis and Its Applications, 1983openaire +1 more source
Koopman operator dynamical models: Learning, analysis and control
Annual Reviews in Control, 2021Stefan Sosnowski
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Crystal structure of trp represser/operator complex at atomic resolution
Nature, 1988Zbyszek Otwinowski
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Second quantized form of a two-particle operator
American Journal of Physics, 1976openaire +1 more source
Unusual location and function of the operator in the Escherichia coli galactose operon
Nature, 1979Benoit De Crombrugghe
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A nonlocal operator method for solving partial differential equations
Computer Methods in Applied Mechanics and Engineering, 2020Huilong Ren +2 more
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