Atomic Orbital Laplace-transformed MP2 Theory for Periodic Systems

3 Atomic Orbital Laplace-transformed MP2 Theory for Periodic Systems 

In [184] explicit expressions were presented for electron-correlation at the MP2 level and implemented for the total energy per unit cell and for the band structure of extended systems. Using MP2 for (the total energies of one deter- 

we briefly present the main points of Laplace MP2 theory for periodic systems. 

Equation (5.30) for the correlation energy in the MP2 approximation for molecules can be written in the form 

For periodic systems the MP2 correlation energy correction is given by an expression very similar to the molecular case [184] the only difference is the use of the crystalUne Bloch (canonical) orbitals instead of MOs  

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