Slavefermion

Slavefermion is a concept in many-body quantum mechanics that describes the behavior of a quantum system in terms of a set of collective variables. These collective variables, known as slavefermions, emerge as a way to encode the correlations between the individual particles in a complex quantum system.

The concept of slavefermions was first introduced in the context of intensive research into strong correlations in quantum systems. It has since been applied to a wide range of fields, including condensed matter physics, atomic physics, and quantum chemistry. In these fields, the slavefermion description provides a useful and compact way of treating the complexity of the many-body problem.

In a slavefermion approach, a physical fermion is decomposed into a bosonic degree of freedom and a slavefermion field. This decomposition is typically done for technical convenience, as it often leads to a decoupling of the slavefermion fields from the physical degrees of freedom. This decoupling allows for an approximate treatment of the many-body problem, which can be more manageable than dealing with the original complex system.

The slavefermion formalism has been used to study a variety of phenomena, including superconductivity, superfluidity, and the properties of quantum liquids. While the slavefermion approach is a simplification of the many-body problem, it has proven to be a useful tool for understanding complex quantum systems in numerical and analytical calculations.