Continuum Field Approximation for the η Pairing Mechanism of a Hubbard Model Within the Framework of a Mean-Field Theory |
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| Authors: | SU Gang |
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| Affiliation: | Department of Physics, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | A quantum field theory for the η pairing mechanism of a Hubbard model within the mean-field framework is presented in this letter. It is found that the energy spectrum has two separate branches, and the eigenfunction has a plane-wave type. This result differs from the discrete lattice case in momentum space. |
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