Møller–Plesset perturbation theory (MP theory) is a quantum mechanical method used to calculate the electronic structure of many-body systems, particularly in quantum chemistry. It is based on perturbation theory, which provides a way to approximate the properties of a complicated system by starting from a simpler one and systematically adding corrections.

The nuclear ensemble approach is a concept used in nuclear physics and statistical mechanics to describe the behavior of a large collection of nuclear systems. It is particularly relevant when dealing with systems where quantum effects and statistical distributions play a significant role, such as in models of nuclear structure and reactions. In essence, the nuclear ensemble approach can be understood as follows: 1. **Ensemble of States**: Instead of considering a single nuclear state, the nuclear ensemble approach looks at a statistical mixture of many possible nuclear configurations.

Alberte Pullman is not widely recognized in popular culture or historical records, and there may not be significant information available under that name. It is possible that it could refer to a lesser-known individual, a character in a specific work of fiction, or a term used in a niche context.

Trihydrogen oxide is a chemical name for water (H₂O). It consists of two hydrogen atoms covalently bonded to one oxygen atom. The name "trihydrogen oxide" reflects its molecular composition, with "tri-" indicating three atoms of hydrogen (in this case, two atoms of hydrogen and one of oxygen). This terminology is sometimes used in scientific discussions, particularly in contexts emphasizing the chemical properties of water, but it is not commonly used in everyday language.

Emily A. Carter is a prominent theoretical chemist renowned for her contributions to the fields of chemistry, materials science, and nanotechnology. She is particularly known for her work on computational methods and the development of new materials, including catalysts and materials for energy applications. As of my last knowledge update in October 2023, she has held academic positions at institutions such as Princeton University and has served in administrative roles, including as the Dean of the School of Engineering and Applied Science at Princeton.

Ernest R. Davidson is a notable figure in the field of chemistry, particularly known for his contributions to computational chemistry and theoretical chemical methods. He has published extensively on topics such as quantum chemistry, molecular modeling, and statistical mechanics. Davidson's work has significantly impacted the development of algorithms and methodologies in computational chemistry, making it easier for researchers to simulate and understand chemical systems. If you were referring to something else or have a specific context in mind regarding Ernest R. Davidson, please provide more details!

George C. Schatz is a prominent American chemist known for his contributions to the fields of physical chemistry and materials science. He is particularly recognized for his research in areas such as nanoscience, molecular self-assembly, and theoretical modeling of chemical systems. As of my last update, he has held positions in academic institutions, including serving as a professor at Northwestern University. Schatz has published extensively in scientific journals and has been involved in various interdisciplinary studies that bridge chemistry, physics, and engineering.

Ali Alavi could refer to multiple individuals, but without specific context, it's difficult to pinpoint exactly which Ali Alavi you are referring to. He could be an academic, a professional in a certain field, or someone notable in a particular area such as business, arts, or sports.

Axel D. Becke is a prominent Canadian theoretical chemist known for his significant contributions to the field of computational chemistry, particularly in the development of density functional theory (DFT). He is best known for the Becke exchange and correlation functionals, which are essential components of many modern DFT methods. His work has had a substantial impact on the ability to predict molecular properties and reactions with greater accuracy.

Benjamin Widom (1921–2022) was a prominent American physical chemist known for his significant contributions to the fields of statistical mechanics and thermodynamics. He was involved in research that advanced the understanding of phase transitions and the behavior of complex fluids. Widom's work is recognized for its theoretical insights and has influenced various areas in physical chemistry, including the study of solutions and critical phenomena.

Bettina G. Keller is a researcher and academic known for her work in the field of psychology, specifically in areas such as cognitive psychology and the understanding of decision-making processes. Her research may encompass topics related to human behavior, cognition, and the psychological factors influencing decisions.

Charles Coulson refers to a notable American theoretical chemist known for his work in quantum chemistry. He is particularly recognized for his contributions to the development of computational methods and techniques used in the study of molecular systems. His work has significantly advanced the understanding of electron interactions and chemical bonding in molecules. In a different context, the name "Charles Coulson" may also refer to historical figures, local personalities, or fictional characters, depending on the specific reference or context.

As of October 2021, there's no widely recognized reference to "Christel Marian." It could be a person’s name or could refer to a specific context, product, work of art, or concept that has emerged recently or is more niche.

Christopher J. Cramer could refer to various individuals, but one prominent figure by that name is a professor of chemistry known for his work in computational chemistry and theoretical chemistry. He has contributed significantly to the field, particularly in the areas of chemical kinetics, reaction mechanisms, and computational methods to study chemical systems. If you're looking for information about a specific Christopher J. Cramer or a different context, please provide more details for a more tailored response!

An **aperiodic finite state automaton (AFSA)** is a type of finite state automaton (FSA) that possesses certain structural characteristics related to the periodicity of its states. In the context of automata theory, the concept of periodicity has to do with the behavior of the automaton as it processes inputs.

Christopher Longuet-Higgins was a prominent British scientist known for his contributions to the fields of cognitive science, psychology, and neuroscience. He is particularly notable for his work in the understanding of perception, cognitive processes, and the intersection of these with artificial intelligence. Longuet-Higgins has published extensively on topics such as visual perception, the processing of auditory information, and the theoretical foundations of cognitive models.

David Tannor is a name that could refer to various individuals, but one notable person associated with this name is a physicist known for his contributions to the field of laser science and molecular optics. He has conducted research in areas such as ultrafast phenomena and the interaction of light with matter.

Mark S. Gordon is a name that may refer to various individuals across different fields, including academia, business, or other domains. Without additional context, it’s difficult to pinpoint which Mark S. Gordon you are referring to.