Dynamics of fermions coupling to a U „ 1 ... gauge field in the limit e
نویسنده
چکیده
In this paper we study the properties of a gas of fermions coupling to a U~1! gauge field at wave vectors q,L!kF at dimensions larger than 1, where L!kF is a high-momentum cutoff and kF is the Fermi wave vector. In particular, we shall consider the e2→` limit, where charge and current fluctuations at wave vectors q,L are forbidden. By generalizing a method reported in a previous paper @Phys. Rev. B 62, 7019 ~2000!#, we show that the system can be described as a ‘‘marginal’’ Fermi liquid of spin 1/2; chargeless fermions with vanishing wave functions overlap with the bare fermions in the system.
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Dynamics of fermions coupling to a U ( 1 ) gauge field in the limit e 2 → ∞
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