Dear Users and developers of Quantum espresso,<div> I have some question regarding D3 code .</div><div><br></div><div>I am interested in Anharmonic properties of crystals and for that i am using D3 code of quantum espresso while going through the source code i figured out that present version of quantum espresso calculates Anharmonic IFCs only for q=0,q' and q" .</div>
<div>So that mean that quantum espresso gives us anharmonic IFCs in reciprocal space something like phi(0,q',q') where phi denotes anharmonic IFC.</div><div><br></div><div>I have two questions on this </div><div>
<br></div><div>(1)--Whether my understanding is correct?</div><div>(2)--For my work i need anharmonic IFCs in real space means phi(0,l,l') </div><div>I known that this can be done by taking inverse Fourier transform of phi(0,q',-q') , but i am clue less after this .</div>
<div>Can anyone give me hint that how to proceed for inverse Fourier transform ...</div><div><br></div><div><br></div><div><br></div><div>I will be great-full to all of you.</div><div>Awaiting for responses </div><div><br>
</div><div><br></div><div><br></div><div>Thanks a lot</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div>With warm regards</div><div>David yang</div><div>NTU</div><div>Singapore </div><div>
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