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quant-ph1999
Gaussian, Mean Field and Variational Approximation: the Equivalence
E. Prodan
We show the equivalence between the three approximation schemes for self-interacting (1+1)-D scalar field theories. Based on rigorous results of [1, 2], we are able to prove that t…
quant-ph1999
Transport properties of fermionic systems
E. Prodan
We extend the method discovered by A Y Alekseev et al to the case of fermions in external fields. A general formula for conductance G is proved. In the (1+1)-D case with symmetry a…