Effective field theory of non-attractor inflation

Effective Field Theory for Inflation

The methods of effective field theory are used to study generic theories of inflation with a single inflaton field. For scalar modes, the leading corrections to the R correlation function are found to be purely of the k-inflation type. For tensor modes the leading corrections to the correlation function arise from terms in the action that are quadratic in the curvature, including a parity-viola...

Effective Field Theories for Inflation

A non-reward attractor theory of depression.

A non-reward attractor theory of depression is proposed based on the operation of the lateral orbitofrontal cortex and supracallosal cingulate cortex. The orbitofrontal cortex contains error neurons that respond to non-reward for many seconds in an attractor state that maintains a memory of the non-reward. The human lateral orbitofrontal cortex is activated by non-reward during reward reversal,...

Non-Fermi Liquid Effective Field Theory of Dense QCD Matter

where vμ = (1, ~v). The field ψv describes particles and holes with momenta p = μ(0, ~v)+k, where k ≪ μ. We will write k = k0 + k‖ + k⊥ with ~k‖ = ~v(~k · ~v) and ~k⊥ = ~k − ~k‖. L4f denotes four-fermion operators in the BCS and zero sound channel. At energies below the screening scale gμ hard dense loops have to be resummed. The generating functional for hard dense loops in gluon n-point funct...

Effective Field Theory

Attempts to apply effective field theory (EFT) methods to nonrelativistic nucleon-nucleon (N N) scattering have raised questions about the nature and limitations of an EFT expansion when used nonperturbatively. We discuss the characteristics of a meaningful EFT analysis and compare them with traditional approaches to N N scattering. A key feature of an EFT treatment is a systematic expansion in...