Quantum mechanics

Composite number

Quantum spin Hall effect

Materials science

Fermi gas

Quantum oscillations

Economics

Fermi liquid theory

Berry connection and curvature

Physics

Mathematics

Fermion

Condensed matter physics

Geometry

Quantum

Composite material

Momentum (technical analysis)

Wave function

Quantum Hall effect

Finance

Electron

Fractional quantum Hall effect

Torus

Dirac fermion

Landau quantization

Composite fermion

Fermi Gamma-ray Space Telescope

Physical review. B./Physical review. B

Fractional quantum Hall effect fluids remain the prototype systems with topological order and strong interactions. They are usually well described as integer quantum Hall states of composite fermions, made of electrons and magnetic flux quanta. The authors investigate a two-dimensional electron gas in a magnetic field at half filling. This system should be described by a Fermi liquid of composite fermions in zero field and is uniquely suited to study the nature of composite fermions as, for instance, to determine if they are Dirac fermions. The composite Fermi liquid is indeed found to give an excellent approximation of the low-energy physics. It also shows unexpected features in the Berry curvature of the composite fermions.

Trial wave functions for a composite Fermi liquid on a torus