absorption.x kernel_scaling not implemented

[James Wu]

Hi all,

It appears that the kernel_scaling keyword has not been implemented. I checked the codebase and found it to correspond to the xct%scaling member, which is not being multiplied by the BSE kernel. Only a check of whether it is zero is performed.

I discovered this when extracting the A matrix of hbse.h5 for kernel_scaling = 1, 2 and noticing they were the same.

Cheers,

James

[Chih En Hsu]

 Hi James,

I’ve checked the source code in both the 4.0 and 3.0 versions, and the tag appears to be functioning correctly.
Although I can’t attach screenshots on this forum, you can verify this around line 224 in BSE/intkernel.f90, where the kernel is scaled prior to assembling the full BSE kernel.
I also revisited several of my previous calculations using this flag, and in those cases the A matrix in hbse.h5 is indeed scaled as expected.

Best,

Andy

jame...@berkeley.edu 在 2025年12月18日 星期四凌晨1:42:45 [UTC+8] 的信中寫道：

[James Wu]

Hi Andy,

Thank you for the clarification, I got things to work now!

--James