How to compute the thermodynamics of a glass using a cloned liquid

The recently proposed strategy for studying the equilibrium thermodynamics of the glass phase using a molecular liquid is reviewed and tested in details on the solvable case of the $p$-spin model. We derive the general phase diagram, and confirm the validity of this procedure. We point out the efficacy of a system of two weakly coupled copies in order to identify the glass transition, and the necessity to study a system with $m<1$ copies ('clones') of the original problem in order to derive the thermodynamic properties of the glass phase.

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