Hello everyone,<div><br></div><div>I try to obtain the polarizability by the linear response. However, I found that the polarizability obtained directly by analytical calculation is different with  that of the numerical calculation (plus/minus a small difference in each direction of electric field manually). </div><div>The analytical calculation:</div><div>   xx,yy,zz        8.08747        5.74058        8.50890<br>   xy,xz,yz        0.00000        0.36536       -0.00000<br>   yx,zx,zy        0.00000        0.36452       -0.00000<br></div><div>The numerical calculation:</div><div> xx,yy,zz        8.26014258       5.78583344        8.76026848<br>   xy,xz,yz        0.00000        0.43385292       -0.00000<br>   yx,zx,zy        0.00000        0.43385292  -0.00000<br></div><div>Attached file is my cp2k_input. Does anyone have some ideas about this.</div><div>Thanks in advance for any kind help</div>

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