Extended variational principle for the Sherrington-Kirkpatrick spin-glass model
Extended variational principle for the Sherrington-Kirkpatrick spin-glass model
The recent proof by Guerra that the Parisi ansatz provides a lower bound on the free energy of the Sherrington-Kirkpatrick (SK) spin-glass model could have been taken as offering some support to the validity of the purported solution. In this work we present a broader variational principle, in which the …