New observables in topological instantonic field theories

作者：Losev Andrey; Slizovskiy Sergey^*

来源：Journal of Geometry and Physics, 2011, 61(10): 1868-1880.

DOI：10.1016/j.geomphys.2011.04.020

• Topological quantum mechanics
• Geometric field theory
• Topological field theory
• Equivariant cohomologies
• Integrated observables

Instantonic theories are quantum field theories where all correlators are determined by integrals over the finite-dimensional space (space of generalized instantons). We consider novel geometrical observables in instantonic topological quantum mechanics that are strikingly different from standard evaluation observables. These observables allow jumps of special type for the trajectory (at the point of insertion of such observables). They do not (anti)commute with evaluation observables and raise the dimension of the space of allowed configurations, while the evaluation observables lower this dimension. We study these observables in geometric and operator formalisms. Simple examples are explicitly computed; they depend on the linking of points.
The new "arbitrary jump" observables may be used to construct correlation functions computing, e.g., the linking numbers of cycles, as we illustrate on Hopf fibration.
We expect that such observables could be generalized in an interesting way to instantonic topological theories in all dimensions.

• 出版日期2011-10