Abstract
The natural degrees of freedom associated with pairing correlations are incorporated in a generalized BCS ansatz to describe ultrasmall superconducting grains. Pairing fluctuations associated with finite systems are fully taken into account. As an example, the formalism is applied to the reduced pairing Hamiltonian where we reproduce the exact solutions in the weak, crossover, and strong pairing regimes. The physical insight of the ansatz and its numerical simplicity make this theory an excellent tool to study pairing correlations in more complex and realistic systems than the one discussed here.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
