Dear CP2K users, <div>I would like to raise again an issue I am encountering when performing TD-DFT computations using range-separated hybrids. At some point in the calculation in the TD-DFT part, some negative transitions appear from nowhere (see outfile). It seems to be really-system dependent and also depends on the truncation radius. I observed it when using wB97-xD and CAM-B3LYP.</div><div>I tried different version of CP2K: 2024.2, 2025.1 <span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px;"> </span><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px;">(compiled with the toolchain) </span>and I see the problem with both of them.</div><div>Do you have any idea where it comes from?</div><div>Thank you for your help!</div><div>Raphael Rullan</div>
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