title: A theory of concepts and their combinations II: A Hilbert space representation creator: Aerts, Diederik creator: Gabora, Liane subject: Cognitive Psychology subject: Philosophy of Mind subject: Artificial Intelligence description: The sets of contexts and properties of a concept are embedded in the complex Hilbert space of quantum mechanics. States are unit vectors or density operators, and contexts and properties are orthogonal projections. The way calculations are done in Hilbert space makes it possible to model how context influences the state of a concept. Moreover, a solution to the combination of concepts is proposed. Using the tensor product, a procedure for describing combined concepts is elaborated, providing a natural solution to the pet fish problem. This procedure allows the modeling of an arbitrary number of combined concepts. By way of example, a model for a simple sentence containing a subject, a predicate and an object, is presented. publisher: Emerald contributor: Riegler, Alexander date: 2005 type: Journal (Paginated) type: PeerReviewed format: application/pdf identifier: http://cogprints.org/4771/1/hvf2.pdf identifier: Aerts, Diederik and Gabora, Liane (2005) A theory of concepts and their combinations II: A Hilbert space representation. [Journal (Paginated)] relation: http://cogprints.org/4771/