9,981 research outputs found
A Proposal to Finance Long-Term Care Services through Medicare with an Income Tax Surcharge
Proposes expanding Medicare to cover comprehensive long-term care services, including home care and custodial nursing home care, and financing this expansion of benefits with a surcharge on federal income taxes
Dynamical properties of a two-dimensional electron gas in a magnetic field within the composite fermion model
We investigate the response of a two-dimensional electron gas, in the
fractional quantum Hall regime, to the sudden appearance of a localised charged
probe using the Chern-Simons theory of composite fermions. The dynamic
structure factor of the electron gas is found to have a major influence on the
spectral function of the probe. In particular, there is an orthogonality
catastrophe when the filling factor is an even-denominator filling fraction due
to the compressibility of the state, but there is no catastrophe at
odd-denominator filling factors because these states have a gap to excitations.
The catastrophe is found to be more severe for composite fermions in zero
effective magnetic field than it is for electrons in zero real magnetic field.
Oscillations in the spectral function, arising when the composite fermions are
at integer filling, have a period equal to the composite fermion cyclotron
energy. We propose a tunneling experiment which directly measures the spectral
function from which one could determine the composite fermion effective mass.Comment: 15 pages of REVTEX. Uses multicol package. Twoside option is default.
There are 29 figures in GIF format to save spac
- …